Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-10-25T22:51:05Z No. of bitstreams: 1 AnaxmandroPereiraDaSilva_DISSERT.pdf: 3779038 bytes, checksum: fe46ec18ca67f9d7742871dc36d43a2a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-12-16T21:11:59Z (GMT) No. of bitstreams: 1 AnaxmandroPereiraDaSilva_DISSERT.pdf: 3779038 bytes, checksum: fe46ec18ca67f9d7742871dc36d43a2a (MD5) / Made available in DSpace on 2016-12-16T21:11:59Z (GMT). No. of bitstreams: 1 AnaxmandroPereiraDaSilva_DISSERT.pdf: 3779038 bytes, checksum: fe46ec18ca67f9d7742871dc36d43a2a (MD5) Previous issue date: 2016-01-29 / Acidentes ambientais envolvendo derramamento de ?leo e seus derivados em meios h?dricos e solo s?o comuns e preocupantes, comprometendo a qualidade do meio ambiente. Uma forma econ?mica e eficiente de remediar estes derramamentos de ?leo ? o emprego do m?todo de sor??o utilizando fibras naturais ou biomassa. O objetivo deste trabalho foi de investigar a capacidade sorvente da fibra de Calotropis Procera para remo??o de petr?leo em meio salino atrav?s de sua caracteriza??o microestrutural. As an?lises realizadas na fibra foram: MEV, DRX, FRX, FTIR, densidade da fibra, ?ngulo de contato e TG/DSC. O petr?leo foi classificado em seu grau API, viscosidade e densidade. Foram realizados ensaios de adsor??o em sistema din?mico nos tempos de 30 e 60 segundos e 100RPM. Os efluentes gerados foram caracterizados pelo teor de ?leos e graxas. Os resultados obtidos atrav?s das an?lises de caracteriza??o da fibra evidenciaram suas propriedades hidrof?bica, oleof?lica, baixa cristalinidade, baixa densidade confirmando sua caracter?stica de flutuabilidade, e a presen?a de compostos org?nicos caracterizando sua origem natural e biodegrad?vel. A estabilidade t?rmica da fibra se mant?m at? a temperatura aproximada de 230?C, ocorrendo perda de massa significativa de 50% na temperatura de 330?C. O petr?leo possui seu grau API 33?, viscosidade de 0,0139 Pas (T=40?C) e densidade de 0,68 g/cm3 (T=15,55?C). O melhor ensaio de adsor??o foi no tempo de 60 segundos, obtendo o valor m?dio de TOG menor que 20 mg/L, atendendo as exig?ncias da resolu??o n? 430/2011-CONAMA. A fibra Calotropis Procera apresentou capacidade de sor??o de hidrocarbonetos, mostrando sua viabilidade no tratamento de efluentes da ind?stria petrol?fera em meio salino, contribuindo para a preserva??o ambiental. / Environmental accidents involving petroleum oil spills and its derivatives in water environment bodies and soil is common and troubling, compromising the quality to the environment. To rectify these oil spills is the use of sorption method by employing natural fibers and biomass is one form of an economic and efficient way. The objective of this work was to investigate the adsorbent capacity of Calotropis Procera fiber for the removal of petroleum oil in a saline water environment, using its microstructural characteristics. These characteristics of the fibers were evaluated using SEM, XRD, XRF, FTIR, fiber density, contact angle and TGA / DSC. The petroleum oil was classified according to its API degree, viscosity and density. Adsorption experiments, under a dynamic system for the times of 30 and 60 seconds and at 100RPM, were carried out. The effluents generated were characterized by the oil and grease content. The results from the fiber characterization analysis, evidenced their properties of hydrophobic, oleophilic, low crystallinity and low density, furthermore, confirming their buoyancy characteristic, and the presence of organic compounds, characterize the fibre being a natural and biodegradable source. The thermal stability of the fiber was maintained until an approximate temperature of 230?C, occurring significant loss of mass of 50% at a temperature of 330?C. The oil has its API 33? degree, viscosity of 0.0139 Pas (T = 40?C) and density 0.68 g / cm3 (T = 15,55?C). The best adsorption test was in the time of 60 seconds, getting an average value of TOG less than 20 mg / L, attending the requirements of Resolution No. 430/2011-CONAMA The Calotropis Procera fiber proved to have an acceptable sorption capacity of hydrocarbon, showing its viability in the treatment of the oil industry effluents in saline conditions, contributing toward the preservation of environment.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-27T12:21:52Z No. of bitstreams: 1 MarcilioDosSantosTavares_TESE.pdf: 4345486 bytes, checksum: 8f84f78e0923aad2b8781e75eb8573ea (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-30T12:18:04Z (GMT) No. of bitstreams: 1 MarcilioDosSantosTavares_TESE.pdf: 4345486 bytes, checksum: 8f84f78e0923aad2b8781e75eb8573ea (MD5) / Made available in DSpace on 2017-01-30T12:18:04Z (GMT). No. of bitstreams: 1 MarcilioDosSantosTavares_TESE.pdf: 4345486 bytes, checksum: 8f84f78e0923aad2b8781e75eb8573ea (MD5) Previous issue date: 2016-07-29 / O conhecimento da composi??o do petr?leo e seus produtos ? uma necessidade imprescind?vel numa refinaria para o ajuste das condi??es do processo. Desta forma a otimiza??o do refino de petr?leo ? fundamental para a predi??o da distribui??o dos produtos e sua qualidade. Realizar o estudo cin?tico da degrada??o t?rmica e catal?tica na presen?a da ze?lita H ?Beta e avaliar os produtos obtidos por PY - CG/ MS de petr?leo leve foi o objetivo principal deste trabalho. Contudo, foram feitas correla??es de dados obtidos atrav?s da destila??o Simulada por Cromatografia a G?s (SIMDIST), da an?lise termogravim?trica (TG/DTG) e da pir?lise acoplada a um espectr?metro de massas (GC/MS), para auxiliar nas an?lises dos dados obtidos. Atrav?s da t?cnica de Fluoresc?ncia de Raios X por Energia Dispersiva (EDX), seguindo o m?todo ASTM D4294 foi poss?vel determinar o teor de enxofre contido na amostra. A termogravimetria (TG/DTG) apresentou tr?s etapas de perdas de massa, onde a primeira etapa est? relacionada ? remo??o de hidrocarbonetos e compostos org?nicos leves. Na segunda etapa ocorre a decomposi??o de arom?ticos de alta massa molecular. E na terceira etapa, ocorreu a degrada??o de coque. Atrav?s da t?cnica de PY ? GC/MS foram detectados os produtos de degrada??o da amostra de petr?leo nas temperaturas de 250?C, 350?C e 450?C, com e sem a presen?a da ze?lita H-Beta. A degrada??o t?rmica e catal?tica da amostra de petr?leo leve foi realizada da temperatura ambiente at? 900?C, nas raz?es de aquecimento de 5, 10 e 20oC min-1. As curvas geradas pela TG/DTG apresentaram uma degrada??o mais acelerada na amostra de petr?leo sem catalisador H-Beta. Esses resultados foram ratificados pela energia de ativa??o, calculada atrav?s do m?todo cin?tico ? Livre (Vyazovkin modelfree Kinetic), em que a presen?a do catalisador reduziu a energia, em especial na faixa de craqueamento, mostrando a efici?ncia do processo, principalmente para a obten??o de materiais leves da composi??o da amostra de petr?leo leve, como diesel e gasolina. / Knowledge of the oil composition and its products is an absolute necessity in a refinery for adjusting the process conditions. Thus the optimization of petroleum refining is essential for predicting the distribution of products and their quality. Perform the kinetic study of the thermal and catalytic degradation in the presence of zeolite H -Beta and evaluate the products obtained by PY-GC/MS of light oil was the main objective of this work. However, data correlations were made obtained by Simulated Distillation by Gas Chromatography (SIMDIST), the thermal gravimetric analysis (TG / DTG) and pyrolysis coupled to a mass spectrometer (GC/MS), to assist in the analysis of data. Through Fluorescence technique of X-ray energy dispersive (EDX) following the ASTM D4294 method it was possible to determine the sulfur content in the sample. Thermogravimetry (TG/DTG) showed three-step weight loss, where the first stage relates to the removal of light hydrocarbons and organic compounds. The second step is decomposition of aromatic high molecular weight. And the third stage was the degradation of coke. Through the technique PY-GC/MS were detected degradation products of the oil sample at temperatures of 250?C, 350?C and 450?C, with and without the presence of zeolite H-Beta. The thermal and catalytic degradation of light oil sample was carried out from room temperature to 900C, the heating rates of 5, 10 and 20 ? C min-1. The curves generated by TG/DTG showed a faster degradation in the sample oil without H-Beta catalyst. These results were confirmed by activation energy calculated using the kinetic method - Free (Vyazovkin modelfree Kinetic) in the presence of the catalyst decreased energy, in particular in cracking band, showing the process efficiency, particularly for obtaining lightweight materials of light oil sample composition, such as diesel and gasoline.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-09T21:56:36Z No. of bitstreams: 1 EvanimekBernardoSabinoDaSilva_TESE.pdf: 6744348 bytes, checksum: f090e76c94eab2c1452d1ff7b48943a1 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-10T17:34:06Z (GMT) No. of bitstreams: 1 EvanimekBernardoSabinoDaSilva_TESE.pdf: 6744348 bytes, checksum: f090e76c94eab2c1452d1ff7b48943a1 (MD5) / Made available in DSpace on 2017-02-10T17:34:07Z (GMT). No. of bitstreams: 1 EvanimekBernardoSabinoDaSilva_TESE.pdf: 6744348 bytes, checksum: f090e76c94eab2c1452d1ff7b48943a1 (MD5) Previous issue date: 2016-08-15 / O presente trabalho foi realizado com a finalidade de observar a aplica??o do tratamento eletrocin?tico e o comportamento de seus fen?menos (eletr?lise, eletro-osmose, eletromigra??o e eletroforese) na descontamina??o de solos carbon?ceo contaminado por componentes ex?geno. Para a comprova??o desta, foi realizada uma s?rie de experimentos para determina??o de melhor volume para trtamento, assim modificando as c?lulas eletrocin?ticas utilizadas. Os experimentos foram realizados em c?lula com volumes internos diferentes, variando de 0.2 L, 1.5 L e 3.0 L, variando assim o volume para melhor comprotar as amostras, desta forma favorecendo a defini??o de uma c?lula com melhor rendimento para o experimental. Em ambos os experimentos desenvolvidos o solo foi contaminado com concentra??es diferentes de petr?leo bruto da forma??o Umburana, variando entre 500 mg/L a 2500 mg/L, desta maneira constituindo a matriz sedimentar carbon?fera contaminada. Para configura??o da amostra utilizou-se de uma quantidade de sedimento com peso variando entre 0,05 Kg, 0.8 Kg e 1,5 Kg de rocha sedimentar carbon?fera macerada, o processamento foi feito para que esta atigisse uma fra??o granulometrica de 35# (mesh) ou 0.5 mm. A s?rie de experimentos ser? discutida em tr?s grandes unidades; Experimentos preliminares, interm?diarios e finais nos quais se consolidou uma metodologia para o Remedia??o Eletrocin?tica de Solos (RES) com maior rendimento devido s interferencias construtivas da propria c?lula utliada. Os eletrodos utlizados para a remedia??o foram o ?nodo Dimensionalmente Estavel (DSA) de Rut?nio-Tit?nio-?xido (Ti/Ru0,34Ti0,66O2) e eltrodos de Gr?fite Carbono (gr?fite sp2) aplicando diferentes correntes eletricas. A elimina??o dos compostos org?nicos foi monitorada mediante Carbono Org?nico Total (COT), Potencial Zeta (?) e medidas espectrofotom?tricas (UV-Vis?vel). Tamb?m foram feitas medida de potencial Hidrog?nio-i?nico (pH), condutividade (S/cm), e volume de vaporiza??o do eletr?lito utilizado (Na2SO4). Os resultados indicaram descontamina??o do meio entre 50% a 80% com baixo custo de 0.04 Real/kWh, sendo um bom percentual para remo??o de derivados de petroleo em solo. Os testes duraram entre 72 h a 480 h e foi verificada a remo??o de poluentes org?nicos nos compartimento cat?dico e an?dico, e com provavel carga de metais pesado. O potencial zeta indicou que os compostos org?nicos s?o transportados devido aos fen?menos de eletromigra??o e eletro-osmose, e confirma que o tamanho das part?culas varia ao decorrer do tempo de descontamina??o, formando assim ?cluster? de part?culas eletricamente carregadas que em sua grande maioria det?m carga negativa. A eletr?lise dos eletr?litos favoreceu a forma??o de um gradiente de pH, formando assim uma frente ?cida/b?sica constatada por n?lise dos eletrolitos nos reserv?torios, esta permitindo um aumento na mobilidade dos contaminantes do solo para os reservatorios. O efluente residual contaminado com petr?leo, tamb?m foi tratado com ox?da??o an?dica utlizando de eletrodo de dimanete dopado com boro (DDB) e densidades de corrente de 20 e 60 mA/cm2, os n?veis finais de descontamina??o atingido pelo tratamento acoplado foram de 80% no residual do efluente, definindo um alto n?vel de descontamina??o. / This work was carried out with the purpose of observing the application of electrokinetic treatment and behavior of its phenomena (electrolysis, electro-osmosis, electromigration and electrophoresis) in the decontamination of carbonaceous soils contaminated by exogenous components. To test this, a series of experiments was performed to determine the best volume treatment thus modifying electrokinetic cells used. The experiments were performed in cells with different internal volumes ranging from 0.2 L, 1.5 L and 3.0 L, thus varying the volume to better comprotar samples thus favoring the development of a cell with better performance for the experiment. In both experiments developed soil was contaminated with different concentrations of crude oil from the formation Umburana ranging from 500 mg/L to 2500 mg/L, thus constituting the contaminated sediment coal matrix. For configuration of the sample used is an amount of sediment weighing between 0.05 kg, 0.8 kg and 1.5 kg of coal sedimentary rock macerated, processing was done so that is reached one granulometric fraction of 35 # (mesh ) or 0.5 mm. A series of experiments will be discussed in three main units; Preliminary experiments, intermediate and final in which consolidated a methodology for Electrokinetic Remediation of Soils (RES) with higher yield due to constructive interference of s own utliada cell. The utlizados electrodes for remediation were Dimensionally Stable Anode (DSA) of ruthenium-titanium-oxide (Ti/Ru0,34Ti0,66O2) and electrodes of graphite carbon (graphite sp2) applying different currents eletricas. The removal of organic compounds was monitored by Total Organic Carbon (TOC), Zeta potential (?) and spectrophotometric measurements (UV-Visible). They were also made Hydrogen ion-potential measurement (pH), conductivity (mS/cm) and the volume of vaporization of the electrolyte used (Na2SO4). The results indicated decontamination of the medium between 50% to 80% with low cost 0.04 Real/kWh, with a good percentage for removal of oil derivatives on the ground. The tests lasted between 72 h to 480 h and checked for removal of pollutants in the cathodic and anodic compartment, with possible load heavy metals. The zeta potential indicated that the organic compounds are transported due to electromigration and electro-osmosis phenomena, and confirms that the particle size varies during the decontamination time, thus forming "cluster" of electrically charged particles that mostly holds negative charge. Electrolysis of electrolyte favors the formation of a pH gradient, thus forming an acid/base face detected by analysis of the electrolyte in the reservoirs, it is enabling an increase in mobility of soil contaminants to the reservoirs. The residual effluent contaminated with oil, has also been treated with anodic oxidation utlizando of electrode the dimond doped with boron (DDB) and current densities of 20 and 60 mA/cm2, the final levels of decontamination achieved by coupled treatment were 80% in the residual effluent defining a high level of decontamination.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-13T19:30:59Z No. of bitstreams: 1 SemuelEbenezerDantasCosta_DISSERT.pdf: 2332965 bytes, checksum: 24eae1eac20acde1c606345ae154f7cf (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-14T18:58:51Z (GMT) No. of bitstreams: 1 SemuelEbenezerDantasCosta_DISSERT.pdf: 2332965 bytes, checksum: 24eae1eac20acde1c606345ae154f7cf (MD5) / Made available in DSpace on 2017-02-14T18:58:51Z (GMT). No. of bitstreams: 1 SemuelEbenezerDantasCosta_DISSERT.pdf: 2332965 bytes, checksum: 24eae1eac20acde1c606345ae154f7cf (MD5) Previous issue date: 2016-08-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / As rochas naturais usadas em ensaios de recupera??o avan?ada de petr?leo apresentam alto custo de obten??o, s?o anisotr?picas e, al?m disso, h? a necessidade de realiza??o de v?rios ensaios para estudos detalhados de algum m?todo de recupera??o avan?ada. Por esta causa, este estudo consistiu na obten??o de arenitos sint?ticos feitos a partir de areia da praia e argila cer?mica que tivessem propriedades semelhantes ?s de rochas naturais. Para isto, variaram-se a concentra??o de argila (20 a 40%, em massa), a press?o de compacta??o (100 a 200 kgf/cm2) e a temperatura de sinteriza??o (850 a 950 ?C) e foi feito um planejamento fatorial 23 com triplicata no ponto central, com o aux?lio do software Statistica 8.0. Tamb?m foram realizadas an?lises de composi??es qu?mica e mineral?gica dos materiais, de reologia dos fluidos e de recupera??es convencionais de petr?leo. Os resultados mostraram que aumentos na press?o de compacta??o, concentra??o de argila e a redu??o da temperatura causam redu??o da porosidade e permeabilidade e aumento na resist?ncia ? compress?o uniaxial. Os modelos gerados para estas vari?veis-resposta s?o significativos e preditivos, descrevendo satisfatoriamente o conjunto de dados, os quais tiveram boa reprodutibilidade. O arenito sint?tico AS 10 foi escolhido para os ensaios de recupera??es convencionais de petr?leo por apresentar maior resist?ncia ? compress?o uniaxial e por ter permeabilidade semelhante ? do arenito Berea, o mais usado em ensaios de recupera??o avan?ada em todo o mundo. Os ensaios de recupera??es convencionais com o AS 10 mostraram a rela??o inversa entre a viscosidade do petr?leo e o fator de recupera??o. Al?m disso, os fatores de recupera??es convencionais ficaram pr?ximos aos de ensaios com arenitos naturais que usaram petr?leo com viscosidade semelhante. / The natural rocks used for studying enhanced oil recovery (EOR) are expensive to acquire and are also anisotropic. Moreover, any detailed study on enhanced recovery requires several tests. For those reasons, this work consisted on obtaining synthetic sandstones composed of beach sand and ceramic shale, both with properties similar to those found in natural rocks. In order to do so, variations were performed on shale concentration (from 20 to 40% in weight), on compaction pressure (from 100 to 200 kgf/cm2) and on syntherization temperature (from 850 to 950 ?C), and a 2? factorial design with centerpoint triple replicates was done, using the Statistica 8.0 software. Experiments aiming to analyse the material chemical and mineralogical compositions, the fluids rheology and the conventional oil recovery were also performed. The results showed that increases in compaction pressure and in shale concentration and decreases in temperature lead to decreases in porosity and permeability and to increases in resistance to uniaxial compression. The models generated to theses response variables are meaningful and predictive, describing accurately the data, which presented a good reproducibility. The AS 10 synthetic sandstone was used for the conventional oil recovery experiments mainly for having the greatest resistance to uniaxial compression and for displaying permeability similar to the Berea sandstone, which is the most used in enhanced recovery worldwide. The conventional oil recovery experiments using the AS 10 showed the inverse relationship between oil viscosity and recovery factor. Furthermore, the conventional recovery factors found were similar to those from natural sandstone performed with oil having a similar viscosity.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-09-05T19:25:25Z No. of bitstreams: 1 AlvaroGustavoPauloGalvao_DISSERT.pdf: 2667387 bytes, checksum: 5bf60c0285a5be566d4b19dddc68fd68 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-09-13T21:41:06Z (GMT) No. of bitstreams: 1 AlvaroGustavoPauloGalvao_DISSERT.pdf: 2667387 bytes, checksum: 5bf60c0285a5be566d4b19dddc68fd68 (MD5) / Made available in DSpace on 2017-09-13T21:41:06Z (GMT). No. of bitstreams: 1 AlvaroGustavoPauloGalvao_DISSERT.pdf: 2667387 bytes, checksum: 5bf60c0285a5be566d4b19dddc68fd68 (MD5) Previous issue date: 2017-06-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Enxofre ? o terceiro elemento mais abundante no petr?leo e ? considerado um dos principais contaminantes presentes nessa matriz, podendo ocorrer nas formas de sulfetos, tiofenos, mol?culas polic?clicas contendo oxig?nio e nitrog?nio etc. Podem provocar corros?o, envenenamento de catalisadores automotivos e de processos do refino. Na queima dos combust?veis, quando presentes, d?o origem aos ?xidos SOX, que contribuem com a forma??o da chuva ?cida, acidez do solo e problemas respirat?rios na popula??o. Logo, a determina??o de enxofre ? de primordial interesse tanto para a ind?stria petroqu?mica quanto na ?rea da qu?mica anal?tica. Diante dessa conjuntura, ? proposto neste trabalho o desenvolvimento de um procedimento de preparo de amostras de petr?leo para determina??o por Cromatografia de ?ons (IC) do teor de enxofre como sulfato (SO4 2-). Para tal, a decomposi??o por via ?mida em sistema fechado assistida por radia??o micro-ondas, auxiliada pela a??o oxidativa de H2O2, foi o procedimento adotado, onde a temperatura e pot?ncia m?xima de 230 ?C e 1000 W, respectivamente, foram utilizadas no programa de aquecimento. Seis amostras de petr?leo (?API entre 18,75-25,17) foram analisadas, sendo as concentra??es m?dias de enxofre obtidas entre 377,50 e 3321,74 mg Kg-1, com DP entre ? 1,02 e ? 9,56. Para efeitos da avalia??o dos resultados obtidos, realizou-se a determina??o do teor de enxofre nas amostras em estudo utilizando a t?cnica UVF, fundamentada na norma oficial ASTM D5453-12, onde correla??es entre 85,43 e 106,43% foram alcan?adas, evidenciando a efici?ncia do m?todo proposto na convers?o das esp?cies de enxofre contidas nas amostras a sulfato e sua determina??o por IC. A efici?ncia do procedimento de decomposi??o adotado foi testada atrav?s do RCC% e do EOMD%, sendo alcan?ados teores entre 6,72 e 15,73% e 85,85 e 94,14%, respectivamente, demonstrando a efici?ncia do procedimento de decomposi??o utilizado. / Sulfur is the third most abundant element in petroleum and is considered one of the main contaminants present in this matrix, and may occur in the forms of sulfides, thiophenes, polycyclic molecules containing oxygen and nitrogen etc. They can cause corrosion, poisoning of catalysts used in refining and in automobiles. In fuel combustion, when present, they give rise to SOX oxides, which contribute to the formation of acid rain, soil acidity and respiratory problems in the population. Therefore, the determination of sulfur is of primary interest for the petrochemical industry as well as for analytical chemistry. Considering this situation, it is proposed the development of a procedure for the preparation of petroleum samples for the determination of the sulfur content of sulfur (SO4 2-) by Ion Chromatography (IC). For this, the wet decomposition assisted by microwave radiation, assisted by the oxidative action of H2O2, was the adopted procedure, where the maximum temperature and power of 230 ?C and 1000 W, respectively, were used in the program of heating. Six petroleum samples (?API between 18.75-5.17) were analyzed, with the mean concentrations of sulfur being between 377.50 and 3321.74 mg Kg-1, with a standard deviation between ? 1.02 and ? 9.56. For the purposes of the evaluation of the obtained results, the sulfur content in the samples under study was evaluated using the UVF technique, based on the official standard ASTM D 5453-12, where correlations between 85.43 and 106.43% were reached, evidencing the efficiency of the method proposed in the conversion of the sulfur species contained in the samples to sulfate and its determination by IC. The efficiency of the adopted decomposition procedure was tested using RCC% and EDMO%, with levels between 6.72 and 15.73% and 85.85 and 94.14% being respectively achieved, demonstrating the efficiency of the decomposition procedure used.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-11-01T22:40:26Z No. of bitstreams: 1 CarlosHumbertoRiosMendesJunior_DISSERT.pdf: 1738341 bytes, checksum: 8d27f4a6e6c8165dad20fde97b288c9f (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-11-14T00:23:14Z (GMT) No. of bitstreams: 1 CarlosHumbertoRiosMendesJunior_DISSERT.pdf: 1738341 bytes, checksum: 8d27f4a6e6c8165dad20fde97b288c9f (MD5) / Made available in DSpace on 2017-11-14T00:23:14Z (GMT). No. of bitstreams: 1 CarlosHumbertoRiosMendesJunior_DISSERT.pdf: 1738341 bytes, checksum: 8d27f4a6e6c8165dad20fde97b288c9f (MD5) Previous issue date: 2017-09-25 / A presente obra se disp?e a analisar a quest?o do labor ligado ? ind?stria do petr?leo quando este ocorre em plataformas e embarca??es de apoio mar?timo, no ?mbito da Zona Econ?mica Exclusiva brasileira. Pretende-se primordialmente, sob o prisma do princ?pio basilar do Direito do Trabalho que ? o Princ?pio da Prote??o, verificar com o aux?lio do m?todo hipot?tico-dedutivo a possibilidade de efetiva??o de direitos atrav?s da normatiza??o atualmente incidente sobre o setor, isto diante do contexto ambivalente da descoberta da possibilidade de extra??o na camada do "pr?-sal" aliada ? recente crise no pre?o do barril de petr?leo. De in?cio, ? trazida uma contextualiza??o quanto ? cria??o e desenvolvimento da ind?stria do petr?leo brasileira, sua expans?o para o mar, bem como as caracter?sticas do espa?o mar?timo onde a maior parte da explora??o no pa?s ocorre: a Zona Econ?mica Exclusiva. Em seguida, partindo da Constitui??o Federal de 1988, ? abordado o sistema de prote??o laboral no Brasil, sua import?ncia e princ?pios, seu di?logo de fontes e as particularidades do trabalho embarcado ? que implicam na necessidade de uma prote??o espec?fica. Posteriormente, se analisa aspectos quanto ? terceiriza??o intensa ao qual se submete o setor e ? quest?o da aplicabilidade ou n?o da legisla??o laboral sobre os contratos internacionais de trabalho, comuns na ?rea. Por fim, parte-se para uma an?lise das normas, em sentido amplo, aplic?veis tanto na atua??o do petroleiro propriamente dito como na do tripulante das embarca??es de apoio mar?timo. Este estudo se utilizou dos m?todos monogr?fico e hipot?tico-dedutivo, com revis?o de doutrina e jurisprud?ncia relativas ao tema e investiga??o das normas em sentido amplo incidentes. / This work intends to analyze the question of labour related to the oil industry when it occurs in platforms and maritime support vessels, within the scope of the Brazilian Exclusive Economic Zone. It is intended, primarily, under the prism of the fundamental principle of Labor Law, which is the Principle of Protection, to verify with the help of the hypothetical-deductive method the possibility of actualizing rights through the normatization currently pertaining to the sector, this against the ambivalent context of the discovery of the possibility of extraction in the "pre-salt" layer allied to the recent crisis in the price of the oil barrel. Initially, a contextualization about the creation and development of the Brazilian oil industry is brought, its expansion into the sea, as well as the characteristics of the maritime space where most of the exploration in the country occurs: the Exclusive Economic Zone. Next, starting from the 1988 Federal Constitution, the system of labour protection in Brazil is approached, its importance and principles, its dialogue of sources and the particularities of the offshore work, which incurs in the need of a specific protection. After, aspects on the intense outsourcing to which the sector is subjected and on the question of the applicability or not of the labor legislation on the international labour contracts, which are common in the area, are analyzed. Finally, we incur in an analysis of the norms, in a broad sense, applicable both to the performance of the oil workers themselves as well as to the crew of the maritime support vessels. This study used the monographic and hypothetical-deductive methods, with a review of doctrine and jurisprudence related to the topic and investigation of the applicable norms, in a broad sense.

Made available in DSpace on 2015-04-14T13:46:36Z (GMT). No. of bitstreams: 1 406829.pdf: 3392583 bytes, checksum: 6bdd9a6da7867db36e2dedee06c1f6e2 (MD5) Previous issue date: 2008-10-24 / A presente pesquisa prop?e-se, atrav?s do estudo de caso da Refinaria Ipiranga, a compreender o desenvolvimento e o fortalecimento da imagem institucional deste grupo empresarial que iniciou suas atividades na cidade de Rio Grande (RS) nos anos 1930. O objetivo deste estudo ? analisar como a empresa privada, nacional e familiar foi constru?da e a forma encontrada para enfrentar as dificuldades, diante da sucess?o de governos e per?odos de instabilidade s?cio-econ?mica. Tamb?m tem-se como objetivo o estudo da trajet?ria deste grupo familiar que se manteve durante trinta anos no mercado e se transformou num forte grupo empresarial. A metodologia utilizada nesta pesquisa consiste em revis?o bibliogr?fica dos temas pertinentes, pela hist?ria oral e pelo acervo documental desta empresa. Nesta busca, tendo sido delimitado o per?odo de 1930 a 1967, prioriza-se a an?lise dos elementos componentes da comunica??o visual que constru?ram a marca Ipiranga. O foco se estabelece na medida em que se observa o grau de relev?ncia que ? colocado na proje??o de uma empresa atrav?s da sua imagem.

Made available in DSpace on 2014-12-17T15:41:44Z (GMT). No. of bitstreams: 1 HeraldoSA_capa_ate_cap4_conclusao_e_referencias.pdf: 658887 bytes, checksum: 11fc03947cae68eafc72706a5e9ce665 (MD5) Previous issue date: 2008-02-10 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Due to the need of increasing production in reservoirs that are going through production decline, methods of advanced recovery have frequently been used in the last years, as the use of conventional methods has not been successful in solving the problem of oil drifting. In this work, the efficiency of different microemulsionated systems in the flow of oil from cores from Assu and Botucatu formations. Regarding drifting tests, cores were calcinated at a temperature of 1000?C, for 18 hours, with the aim of eliminating any organic compound present in it, increasing the resultant permeability. Following, the cores were isolated with resin, resulting in test specimens with the following dimensions: 3.8 cm of diameter and 8.7 cm of length. Cores were saturated with brine, composed of aqueous 2 wt % KCl, and oil from Guamar? treatment station (Petrobras/RN). A pressure of 20 psi was used in all tests. After core saturation, brine was injected again, followed by oil at constant flow rate. The system S3 - surfactant (anionic surfactant of short chain), isoamillic alcohol, pine oil, and water - presented the best drift efficiency, 81.18%, while the system S1E commercial surfactant, ethyl alcohol, pine oil, and distilled water presented low drift efficiency, 44,68% / Diante da necessidade de aumentar a produ??o de reservat?rios que se encontram em decl?neo de produ??o, os m?todos de recupera??o avan?ada v?m sendo bastante utilizados nos ?ltimos anos, visto que apenas os m?todos convencionais n?o t?m solucionado o problema de deslocamento de ?leo. Neste trabalho estudou-se a efici?ncia de diferentes sistemas microemulsionados no deslocamento de ?leo de testemunhos da forma??o Assu e da forma??o Botucatu. Para os ensaios de deslocamento, os testemunhos foram calcinados a uma temperatura de 1000?C, durante 18 horas, com a finalidade de eliminar qualquer mat?ria org?nica presente e aumentar a permeabilidade. Em seguida, os mesmos foram isolados com resina, apresentando as seguintes dimens?es: 3,8 cm de di?metro e 8,7 cm de comprimento. Para a satura??o dos testemunhos foi utilizado salmoura, composta de KCl a 2% em peso, e ?leo oriundo da Esta??o de Tratamento de Guamar? (Petrobras/RN) e em todos os ensaios utilizou-se press?o de 20 psi. Os ensaios de inje??o seguiram as seguintes etapas: para determinar a permeabilidade inicial, foi injetada salmoura, atrav?s do testemunho, em seguida, com o testemunho saturado com salmoura, foi injetado ?leo, ? vaz?o constante. Ap?s a satura??o do testemunho, foi injetada salmoura novamente a fim de obter o percentual de recupera??o pelo m?todo convencional. Para determinar a recupera??o de ?leo pelo m?todo especial foi injetada microemuls?o no testemunho, ? vaz?o constante. Dentre os resultados obtidos o sistema S3, composto de TC (tensoativo ani?nico de cadeia curta), ?lcool iso-am?lico, ?leo de pinho e ?gua destilada apresentou a melhor efici?ncia de deslocamento, 81,18%. Enquanto que o sistema S1E, composto por TA (tensoativo ani?nico comercial), ?lcool et?lico, ?leo de pinho e ?gua destilada apresentou uma baixa efici?ncia de deslocamento, apenas 44,68%

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-12-04T21:21:09Z No. of bitstreams: 1 TancredoDantas_DISSERT.pdf: 2256850 bytes, checksum: 1e1c2e473307cb7d65b98c24ec08c412 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-12-09T00:15:43Z (GMT) No. of bitstreams: 1 TancredoDantas_DISSERT.pdf: 2256850 bytes, checksum: 1e1c2e473307cb7d65b98c24ec08c412 (MD5) / Made available in DSpace on 2017-12-09T00:15:43Z (GMT). No. of bitstreams: 1 TancredoDantas_DISSERT.pdf: 2256850 bytes, checksum: 1e1c2e473307cb7d65b98c24ec08c412 (MD5) Previous issue date: 2016-10-04 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A ind?stria da constru??o civil emprega uma grande diversidade de aditivos desenvolvidos para uso em concretos e argamassas e que apresentam excelente desempenho na modifica??o do comportamento do cimento Portland. Algumas dessas propriedades encontram fun??es an?logas ou similares na engenharia de po?os de petr?leo, como por exemplo, os antiespumantes, dispersantes ou redutores de fric??o, controladores de filtrado e retardadores de pega. Este estudo foi desenvolvido com o objetivo de avaliar e especificar produtos qu?micos alternativos para compor sistemas de aditivos adequados ? formula??o de pastas de cimento para aplica??o em po?os de petr?leo onshore caracterizados por temperaturas a partir de 180?F (82?C), po?os depletados e po?os sujeito ? inje??o de vapor. Durante o per?odo de execu??o do estudo, foram selecionados produtos qu?micos de acordo com sua fun??o. Estes produtos foram especificados segundo normas internas da Petrobras e os testes foram realizados de acordo com a norma API RP 10B. Alguns dos aditivos apresentaram grande potencial para aplica??o em pastas de cimento para temperaturas elevadas, incluindo antiespumantes, controladores de filtrado, dispersantes e retardadores de pega. / The civil construction industry employs a wide diversity of admixtures developed to use in concrete and mortars, but that exhibits excellent performance for oilwell slurries. Some properties meet analogous functions, for example, antifoam, dispersants or friction reducers, fluid loss control agent and set retarders. This study was developed with the objective to evaluate and specify alternative chemical products to be used as admixtures for the formulation of cement slurries for application in onshore oil wells, characterized by temperatures of 180?F (82?C), mature wells and wells subjected to steam injection. During the study, chemical products were selected according its functions. These additives were specified according to PETROBRAS internal standards and the tests were realized according to API RP 10B standards. Some additives presented great potential for application in cement slurries for high temperatures, including antifoams, fluid loss control agents, dispersants and setting retarders.

Made available in DSpace on 2014-12-17T14:07:03Z (GMT). No. of bitstreams: 1 PriscilaSG_DISSERT.pdf: 2914308 bytes, checksum: 264d0eaf11deaccd2e57b10185cf49cb (MD5) Previous issue date: 2012-07-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Grautes are dry mixes with hydraulic characteristics widely used in construction. This material comprises cement, mineral additives and dosed in accordance with the desired properties. The use of grautes in cementing oil wells potentially increases the precision in the composition of the mixture, since it is requires only the addition of the mixing water before its pumping. Such benefit may be availed in cementing wells since the formulations grautes meet the temperature and pressure characteristics typical of wells. The objective of this study is to evaluate the effect of adding different percentages of industrial minerals properties of light grautes for onshore oil wells. For the formulation of the employees were grautes light industrial minerals and waste minerals abundant in the Northeast, in addiction to Portland cement and chemical additives Special class. Grautes were formulated with densities between 1.55 g/cm3 (13.0 lb/gal) and 1.68 g/cm3 (14 lb/gal). Tests results showed that grautes with higher density in the range studied meet the specifications for cementation of shallow wells onshore. The compositions lighter can also be adjusted for applying the material in the cementation of oil wells / Grautes s?o misturas secas com caracter?sticas hidr?ulicas amplamente empregadas na constru??o civil. Este material ? constitu?do por cimento, minerais e aditivos dosados de acordo com as propriedades desejadas. A utiliza??o de grautes na cimenta??o de po?os de petr?leo potencialmente incrementa a precis?o na composi??o da mistura, uma vez que ? necess?ria apenas a adi??o da ?gua de mistura antes de seu bombeio. Tal benef?cio pode ser aproveitado na cimenta??o de po?os desde que as formula??es de grautes atendam ?s caracter?sticas de temperatura e press?o t?picas dos po?os. O objetivo deste trabalho ? avaliar o efeito da adi??o de diferentes percentuais de minerais industriais nas propriedades de grautes leves para po?os de petr?leo onshore. Para a formula??o dos grautes foram empregados minerais industriais leves e res?duos minerais abundantes na regi?o Nordeste, al?m de cimento Portland classe Especial e aditivos qu?micos. Foram formulados grautes com densidades entre 1,55 g/cm3 (13,0 lb/gal) e 1,68 g/cm3 (14,0 lb/gal). Foram realizados ensaios de compacidade, reologia e controle de filtrado. Os resultados mostraram que os grautes que apresentam maior densidade na faixa estudada atendem ?s especifica??es para cimenta??o de po?os rasos onshore. As composi??es mais leves podem, tamb?m, ser ajustadas para a aplica??o do material na cimenta??o de po?os de petr?leo