The current work focused on defining the material science options to fabricate novel, high performing ethylene/ethane (C₂H₄/C₂H₆) separation carbon molecular sieve (CMS) dense film membranes. Three polymer precursors: Matrimid®, 6FDA-DAM and 6FDA:BPDA-DAM were used as precursors to the CMS membranes. CMS performances were tailored by way of tuning pyrolysis conditions such as the pyrolysis temperature, heating rate, pyrolysis atmosphere etc. The CMS dense film membranes showed attractive C₂H₄/C₂H₆ separation performance far exceeding the polymeric membrane performances. Semi-quantitative diffusion size pore distributions were constructed by studying the transport performance of a range of different penetrant gases as molecular sized probes of the CMS pore structure. This, in conjunction with separation performance data, provided critical insights into the structure-performance relationships of the CMS materials. The effects of testing conditions, i.e. the testing temperature, pressure and feed composition on C₂H₄/C₂H₆ separation performance of CMS dense films were also analyzed. These studies were useful not just in predicting the membrane behavior from a practical stand-point, but also in a fundamental understanding of the nature of CMS membrane separation. The study helped clarify why CMS membranes outperform polymeric membrane performance, as well as allowed comparison between CMS derived from different precursors and processing conditions. The effects on C₂H₄/C₂H₆ separation in the presence of binary gas mixture were also assessed to get a more realistic measure of the CMS performance resulting from competition and bulk flow effects. The current work thus establishes a framework for guiding research ultimately aimed at providing a convenient, potentially scalable hollow fiber membrane formation technology for C₂H₄/C₂H₆ separation

Olefin/paraffin separation is a large potential market for membrane applications. Carbon molecular sieve membranes (CMS) are promising for this application due to the intrinsically high separation performance and the viability for practical scale-up. Intrinsically high separation performance of CMS membranes for olefin/paraffin separations was demonstrated. The translation of intrinsic CMS transport properties into the hollow fiber configuration is considered in detail. Substructure collapse of asymmetric hollow fibers was found during Matrimidﾮ CMS hollow fiber formation. To overcome the permeance loss due to the increased separation layer thickness, 6FDA-DAM and 6FDA/BPDA-DAM polyimides with higher rigidity were employed as alternative precursors, and significant improvement has been achieved. Besides the macroscopic morphology control of asymmetric hollow fibers, the micro-structure was tuned by optimizing pyrolysis temperature protocol and pyrolysis atmosphere. In addition, unexpected physical aging was observed in CMS membranes, which is analogous to the aging phenomenon in glassy polymers. For performance evaluation, multiple "proof-of-concept" tests validated the viability of CMS membranes under realistic conditions. The scope of this work was expanded from binary ethylene/ethane and propylene/propane separations for the debottlenecking purpose to mixed carbon number hydrocarbon processing. CMS membranes were found to be olefins-selective over corresponding paraffins; moreover, CMS membranes are able to effectively fractionate the complex cracked gas stream in a preferable way. Reconfiguration of the hydrocarbon processing in ethylene plants is possible based on the unique CMS membranes.

Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-04-30T16:37:00Z No. of bitstreams: 1 CLÁUDIA DOURADO MEDEIROS - DISSERTAÇÃO PPGEQ 2014..pdf: 1542895 bytes, checksum: 5a74f0ba9e6514c2859c363f528e0b6f (MD5) / Made available in DSpace on 2018-04-30T16:37:00Z (GMT). No. of bitstreams: 1 CLÁUDIA DOURADO MEDEIROS - DISSERTAÇÃO PPGEQ 2014..pdf: 1542895 bytes, checksum: 5a74f0ba9e6514c2859c363f528e0b6f (MD5) Previous issue date: 2014-04-02 / Capes / As peneiras moleculares mesoporosas possuem um arranjo hexagonal de mesoporos com diâmetros de poros que variam de 2 a 10 nm, possuindo assim uma área superficial elevada. A adição de um metal a sua estrutura tem como função gerar a acidez ao material o tornando mais reativo, aumentado assim a possibilidade do seu uso como catalisador na indústria do petróleo. Atualmente, um dos problemas encontrados pelos pesquisadores para obtenção desse tipo de peneira, é o longo tempo de formação das estruturas. No presente trabalho as peneiras moleculares mesoporosas MCM-41 e Al-MCM-41 foram sintetizadas utilizando dois processos hidrotermais, a tradicional e por micro-ondas, com o objetivo principal de reduzir o tempo de síntese do material. A peneira molecular MCM-41 foi sintetizada utilizando o processo hidrotermal tradicional, 100 oC por 48 horas , como também utilizando o processo hidrotermal de micro-ondas através de três metodologias, adotando diferentes tempos e temperaturas. Tomando como base os resultados obtidos com as sínteses da peneira molecular MCM-41 por meio do método hidrotermal de micro-ondas, os mesmos métodos foram aplicados para a peneira molecular Al-MCM-41 nas mesmas condições de tempo e temperatura. Através dos difratogramas foi possível perceber que a estrutura hexagonal foi formada. Verificouse que o melhor tempo de síntese da Al-MCM-41 se deu com 60 minutos a 130 oC. A partir destes dados, foram realizadas novas sínteses, reduzindo o tempo gradativamente. Os resultados das análises de DRX, MEV e FTIR comprovam que as peneiras moleculares mesoporosas foram formadas, sendo possível identificar sua estrutura e morfologia. Os melhores resultados de síntese para as peneiras moleculares mesoporosas MCM-41 e Al-MCM-41, foram nos tempos 60 e 40 minutos e temperatura de 130 oC, respectivamente. / The mesoporous molecular sieves have a hexagonal arrangement of mesopores with pore diameters ranging from 2 to 10 nm, which implies in a high surface area. The addition of a metal into these structures has the function of generating acidity in the material making it more reactive, increasing the possibility of using it as a catalyst into the oil industry. Nowadays, one of the problems found by researches to obtain these type of molecular sieves is the long time of structure formation taken by these materials. In this study, the mesoporous molecular sieves MCM - 41 and Al -MCM -41 were synthesized using two traditional microwave, with the primary goal of reducing the time of synthesis of the material hydrothermal processes. The molecular sieve MCM -41 was synthesized using the traditional hydrothermal process 100 °C for 48 hours , as well as hydrothermal process using microwave by three methods , adopting different times and temperatures . Based on the results obtained with the synthesis of molecular sieve MCM -41 by hydrothermal microwave method, the same methods were applied to the molecular sieve Al -MCM -41 under the same conditions of time and temperature. Through the DRX patterns was observed that the hexagonal structure was formed. It was found that the best time of synthesis of Al- MCM-41 was given 60 minutes at 130 oC. From these data, new syntheses were carried out by reducing the time gradually. The results of DRX, MEV and FTIR show that the mesoporous molecular sieves were formed, it is possible to identify their structure and morphology. The best results for the synthesis of mesoporous molecular sieves MCM - 41 and Al -MCM -41, were at times 60 and 40 minutes and temperatures of 130 °C, respectively.

This thesis combines synthetic studies for isotopic enrichment with solid-state characterisation techniques to investigate two classes of microporous materials: zeolites and metal-organic frameworks (MOFs). These materials have a wide range of successful applications, from industrial catalysis to medicine, resulting in the increasing need for both a complete understanding of their unique structural features and synthetic methods to target new frameworks. Nuclear magnetic resonance (NMR) spectroscopy, thanks to its sensitivity to the local, atomic-scale, environment and its element specificity, is applied, in combination with powder X-ray diffraction (PXRD), electron microscopy, N2 adsorption and mass spectrometry, to the study of these materials. Oxygen atoms play a crucial role in the structure and chemistry of zeolites and MOFs, making 17O NMR an excellent tool for chemical and structural investigations. However, the low natural abundance of this isotope (0.037%) and the cost of 17O-enriched reactants require the development of atom-efficient synthetic processes for isotopic enrichment. In the first part of this work, the unconventional assembly-disassembly-organisation-reassembly (ADOR) method is applied to the Ge-doped UTL framework and optimised in reduced-volume conditions for economic enrichment to obtain 17O- and 29Si-enriched UTL-derived zeolites. In situ and ex situ solid-state characterisation studies show that isotopic enrichment not only enables a more detailed spectroscopic investigation, but also provides new insights into the mechanism of the ADOR process and its sensitivity to experimental conditions. In the second part of this work, dry gel conversion synthesis and a novel steaming procedure are studied as cost-effective 17O-enrichment pathways for Al, Ga and Sc mixed-metal terephthalate MOFs. 17O solid-state NMR spectroscopy, in combination with PXRD and electron microscopy, is employed to investigate cation disorder and 17O NMR spectra are shown to be sensitive to substitution of metal centers and conformational changes upon interaction with guest molecules.

Conselho Nacional de Desenvolvimento Científico e Tecnológico / The significant increase of carbon dioxide emissions in the atmosphere comes intensifying the global warming. The search for energetic source that turn emission down is of great importance, as well as the use of complementary actions like dioxide carbon capture process of the main emissions sources. From among some processes already very well-known industrially highlights chemical absorption with alkanolamine, which shows some disadvantages in being costly and generate waste derived from recovery. The use gas-solid selective in carbon dioxide adsorption has very advantages over absorption liquid amine such as easy handling without risks to the environment and recovering of adsorbent material, being possible to use industries plants with continuous flux. In this context were synthesized through hydrothermal method two materials of family M41S of type MCM-41 and MCM-48. Then the materials were impregnated with ethylenediamine by wet impregnation method. These materials were used for the carbon dioxide adsorption process and were characterized by several physic-chemical techniques. The powder X-ray diffraction patterns of the samples showed all peaks characteristics of MCM-41 and MCM-48 before and after impregnation with amines. The absorption spectrum in the infrared region showed bands due to Si-O and O-Si-O bonds in all materials and N-H bonds due to presence of amine in the supports after impregnation process. The thermogravimetric curves showed that stability of material containing amines is up to 100 °C. The materials showed N2 adsorption isotherms type IV, some with hysteresis type H1 and high surfaces areas (over 1000 m2 g-1). Carbon dioxide capture tests in flux system and atmosphere pressure showed significant drawbacks in the capture capacities of carbon dioxide for the materials impregnated with ethylenediamine in comparison to the values obtained with the MCM-41 and MCM-48 supports alone. Tests with closed system and pressure variation in the range of 0.5 to 30 bar allowed the construction of the isotherms to prepared materials of which were fitted using the Langmuir model. The results showed that the samples of MCM-41 and MCM-48 without impregnation are favorable for applications where high pressures are required. / O aumento significativo das emissões de dióxido de carbono na atmosfera vem acentuando o efeito do aquecimento global. A busca por fontes energéticas que minimizem as emissões é de grande importância, como também o uso de ações complementares como processos para captura deste gás das principais fontes emissoras. Dentre alguns processos já bem conhecidos industrialmente, destaca-se a absorção química com alcanolaminas, a qual apresenta algumas desvantagens por ser dispendiosa e gerar rejeitos da sua recuperação. O uso da adsorção gás-sólido seletiva de dióxido de carbono tem muitas vantagens sobre a absorção com aminas líquidas, tais como: fácil manipulação sem riscos ao ambiente, e recuperação do material adsorvente, podendo-se utilizar plantas industriais com fluxo contínuo. Neste contexto, foram sintetizados através do método hidrotérmico dois materiais da família M41S do tipo MCM-41 e MCM-48. Em seguida os materiais foram impregnados com etilenodiamina, através do método de impregnação por via úmida. Estes materiais foram utilizados para o processo de adsorção de dióxido de carbono e foram caracterizados por diversas técnicas físico-químicas. Os difratogramas de raios-X das amostras sintetizadas apresentaram os picos característicos do MCM-41 e do MCM-48 antes e após a impregnação com aminas. Os espectros de absorção na região do infravermelho mostraram bandas devido às ligações Si-O e O-Si-O em todos os materiais e de ligações N-H devido à presença da amina nos suportes após a impregnação. As curvas termogravimétricas mostraram que a estabilidade do material contendo aminas é de até 100 °C. Todos os materiais apresentaram isotermas de adsorção de N2 do tipo IV, alguns com histerese do tipo H1 e elevadas áreas superficiais (acima de 1000 m2 g-1). Os testes de captura de dióxido de carbono em sistema com fluxo e pressão atmosférica mostraram significativas reduções nas capacidades de captura para os materiais impregnados em comparação com os valores obtidos com os suportes MCM-41 e MCM-48. Testes com sistema fechado e variação de pressão na faixa de 0,5-30 bar permitiram o levantamento de isotermas de equilíbrio para os materiais preparados as quais foram ajustadas através do modelo de Langmuir. Os resultados mostraram que as amostras de MCM-41 e MCM-48 são favoráveis para aplicações onde altas pressões são requeridas.

The study of adsorption of n-alkanes in zeolite pores represents both a fundamental problem in molecular thermodynamics and also a problem with substantial industrial importance. Until mid 19th century, adsorption was mainly used for purification processes such as removal of H2S and mercaptans from natural gas and organic matter from water. However, with the emergence of molecular sieves, especially zeolites, adsorption processes have become an attractive alter- native to distillation in large scale separation of mixtures that have low relative volatility into streams each enriched in one of the components. The pore di- ameters of molecular sieves are of the order of molecular diameters and hence selective adsorption can be achieved by both a difference in adsorbate-adsorbent interactions of various species and obstruction by the pore walls to some of the species in the mixture. The existing adsorption theories such as Henry’s law, Langmuir adsorption model and BET isotherm are incapable of predicting the adsorption isotherms of n-alkanes in zeolite pores. The reason is that in microporous adsorbents, the sorbate molecular mechanisms are influenced by geometrical constraints also. This limitation in the use of theory can be overcome by developing a molecular model and using computers to mimic the real system. This nature of simulation is called molecular simulations. With the development of advanced algorithms, improved force-field parameters and very high computational power of present day computers, molecular simulations have become an important tool in studying adsorption on micro-porous materials. Adsorption experiments of mixtures of long chain alkanes into silicalite under liquid phase conditions show selectivity inversion and azeotrope formation. These effects are due to the subtle interplay between the size of the adsorbed molecules and pore topology of the adsorbent. The underlying molecular mechanisms responsible for selective uptake of one of the components cannot be obtained from experiments but can be realized through simulations. Therefore, in this study, the selective uptake of lighter component during liquid phase adsorption of C14/C15 and C15/C16 n-alkane binary mixtures in the zeolite silicalite is understood through configurational bias grand canonical Monte Carlo (CB- GCMC) molecular simulation technique and a course-grained siting analysis. The simulations are conducted under conditions of low and high loading. The siting pattern of the adsorbates inside the zeolite pores is used to explain the selectivity as seen in experiments.

No description available.

Atualmente, o tipo de propelente para produtos em aerossol mais usado no mundo é uma mistura de hidrocarbonetos leves (butano e propano - sendo o primeiro em maior proporção). Parte de seu processo de produção é a dessulfurização do butano líquido, através de adsorção em leito fixo usando peneiras moleculares 13X. A literatura científica não apresenta muitas publicações sobre o tema e considerando que a técnica de adsorção é fortemente dependente de dados experimentais para seu maior entendimento, é objetivo deste trabalho estudar este processo através do equilíbrio de adsorção, das curvas de ruptura e do desenvolvimento de um modelo matemático que represente o funcionamento de uma coluna de adsorção de leito fixo a temperatura constante. Obtiveram-se dados sobre o equilíbrio de adsorção por meio de ensaios em banho finito comparando-se a interação de diferentes compostos de enxofre com a peneira molecular 13X e o efeito da temperatura. Utilizou-se a técnica de cromatografia gasosa como método analítico para obtenção dos teores de compostos sulfurados e de hidrocarbonetos. O modelo de Langmuir apresentou bom ajuste aos dados experimentais. Avaliando-se a interação dos componentes sulfurados com a zeólita 13X, identificou-se diferenças significativas, sendo a maior em ordem decrescente: etil-mercaptana, n-propil-mercaptana e terc-butil-mercaptana, respectivamente. A dinâmica do processo de adsorção foi estudada através da obtenção das curvas de ruptura em leitos em escala laboratorial e piloto. Avaliaram-se as influências da variação da concentração de entrada da n-propil-mercaptana e da velocidade do fluido em leito fixo recheado com zeólitas 13X, mantendo os demais parâmetros constantes. Conforme esperado o aumento da concentração inicial reduz o tempo de ruptura, aumenta a quantidade total adsorvida pelo leito e não altera o comportamento da zona de transferência de massa (ZTM). Analisando-se a elevação da velocidade, nota-se também uma diminuição no tempo de ruptura e um aumento da ZTM. O modelo matemático apresentado considera os balanços de massa microscópicos aplicados ao leito, os fenômenos de transporte de massa com modelo de dispersão axial e transporte por convecção da fase líquida para a superfície da partícula e as isotermas de adsorção. As equações diferenciais parciais resultantes foram adimensionalizadas e resolvidas empregando-se o método de diferenças finitas, implementado por código Matlab®. A partir da simulação matemática das condições experimentais obtiveram-se os parâmetros de dispersão axial e de transferência de massa que possibilitaram uma boa reprodução do tempo de ruptura quanto do perfil da zona de transferência de massa para os experimentos em escala laboratorial e piloto. / Currently, the kind of propellant for aerosol products most widely used in the world is a blend of light hydrocarbons (butane and propane - the first in greater proportion). Part of the production of propellant is the desulfurization of liquid-phase butane by molecular sieves 13X in a fixed bed. The scientific literature concerning the adsorption of the mercaptans using zeolite are scarce and considering that the adsorption technique is strongly dependent on experimental data for its better knowlegde, the aim of this work was to study this process by adsorption equilibrium, the breakthrough curves and the development of a mathematic model, simulation and comparison with the operation of a fixed-bed pilot and laboratory-scale column. Adsorption equilibrium parameters were obtained using finite bath experiment and comparing the interaction of different sulfur compounds with molecular sieve 13X and the temperature effect. It was used the gas chromatography as an analytical method in order to obtain the levels of hydrocarbons and sulfur compounds. The Langmuir model well fit the experimental data. Significant differences were identified in the interaction of the sulfur components with zeolite 13X. The major interactions of the sulfur components are in decreasing order: ethyl-mercaptan, n-propyl-mercaptan and terc-butyl-mercaptan. The dynamic of the adsorption process was studied by obtaining the breakthrough curves in laboratory and pilot scale. It was investigated the influence of the initial concentration of n-propyl mercaptan and the fluid velocity in a fixed bed packed with zeolite 13X keeping the other parameters constant. As it was expected, as the inlet sulfur concentration increases the break point time decrease, and enhances the total amount adsorbed by the bed. Analyzing the increase in velocity on the breakthroug profile, it was noted that also decreases the break point time and causes a greater decline of the curve resulting in greater ZTM and anticipating the bed saturation time. The model equations account the mass balance applied in the flowing liquid phase in the column, transport phenomena as the effect of axial dispersion and convection from liquid phase to the adsorbent surface and adsorption isotherm. Finite difference method was used to solve the dimensionless general partial differential equations and it was implemented by Matlab® software. From mathematical simulation of experimental conditions it were obtained the axial dispersion parameters and mass transfer coefficient which allowed a fair agreement in predicting break point time and the mass transfer zone profile.

In this thesis, we investigate in detail, certain important problems in cryptography and coding theory. In the first part of this thesis, we discuss the number field sieve and compare the two ways in which the sieving step is implemented -one method using the line sieve and the other using the lattice sieve. We discuss why the lattice sieve performs better than the line sieve in the presence of large primes -this has not been attempted before. In the second part of this thesis, we design low-correlation CDMA sequences over the Quadrature Amplitude Modulation (QAM) alphabet. The sequences proposed in this thesis have the lowest value of the maximum correlation parameter as compared to any other family in the literature. In the third part of this thesis, we design large families of optimal two-dimensional optical orthogonal codes for optical CDMA. The size of these codes is larger than any other code in the literature.

Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-04-30T16:52:44Z No. of bitstreams: 1 RAPHAEL DA SILVA EDUARDO - DISSERTAÇÃO PPGEQ 2014..pdf: 2452018 bytes, checksum: 88b5f90f5371eb8c9bb004e2e69c6bd8 (MD5) / Made available in DSpace on 2018-04-30T16:52:44Z (GMT). No. of bitstreams: 1 RAPHAEL DA SILVA EDUARDO - DISSERTAÇÃO PPGEQ 2014..pdf: 2452018 bytes, checksum: 88b5f90f5371eb8c9bb004e2e69c6bd8 (MD5) Previous issue date: 2014 / Capes / A síntese de Fischer-Tropsch, reação de polimerização de gás de síntese na presença de um catalisador, se apresenta como uma oportunidade sustentável de geração de combustíveis de alta qualidade. Diante da necessidade de desenvolvimento de novos materiais, este trabalho tem como objetivo avaliar o desempenho de catalisadores Fe/Cu/K/SBA-15TEOS e Fe/Cu/K/SBA-15CCA na síntese de Fischer-Tropsch. Os catalisadores foram preparados utilizando peneiras moleculares do tipo SBA-15 como suporte, sintetizadas com diferentes fontes de sílica (tetraortosilicato-TEOS e cinzas da casca de arroz-CCA). Os metais foram impregnados por via úmida, utilizando sais como precursores metálicos. As peneiras moleculares SBA-15TEOS e SBA-15CCA foram caracterizadas por Difração de raios X (DRX), Espectrometria de raios x de Energia Dispersiva (EDX), Microscopia Eletrônica de Varredura (MEV) e Capacidade de Adsorção Física de Nitrogênio (BET). Os catalisadores Fe/Cu/K/SBA-15TEOS e Fe/Cu/K/SBA-15CCA foram caracterizados por Difração de raios X (DRX), Espectrometria de raios x de Energia Dispersiva (EDX), Capacidade de Adsorção Física de Nitrogênio (BET) e Redução a Temperatura Programada (RTP). Pelos resultados obtidos, a peneira molecular SBA-15CCA se assemelhou à SBA-15TEOS, sendo caracterizadas como materiais mesoporosos de morfologia típica, porém com resultados distintos de área específica (490 m2/g para SBA-15TEOS e 112 m2/g para SBA-15CCA). Os catalisadores apresentaram composições de sílica, ferro, cobre e potássio nas proporções pré-definidas e boa dispersão sobre a peneira molecular, a qual manteve sua estrutura mesoporosa, porém com redução de área específica após impregnação (257,3 m2/g para Fe/Cu/K/SBA-15TEOS, 91,7 m2/g para Fe/Cu/K/SBA15CCA). Pelos resultados de RTP, foi possível verificar as faixas de temperatura de redução típicas das fases óxidas do ferro e a influência do cobre nesse processo. A avaliação catalítica na síntese de Fischer-Tropsch foi satisfatória na razão molar H2/CO de 1:1, convergindo a altas frações de hidrocarbonetos líquidos. O catalisador Fe/Cu/K/SBA-15TEOS proporcionou excelente conversão a hidrocarbonetos de frações mais pesadas C10+ (78,18%); o catalisador Fe/Cu/K/SBA-15CCA apresentou moderada conversão a hidrocarbonetos líquidos C5+ (54,47%). / The Fischer-Tropsch polymerization reaction of synthesis gas in the presence of a catalyst, is presented as a sustainable opportunity to generate high quality fuels. Given the need for development of new materials, this work aims to evaluate the performance of catalysts Fe/Cu/K/SBA-15TEOS and Fe/Cu/K/SBA-15CCA in Fischer-Tropsch synthesis. The catalysts were prepared using molecular sieves type SBA-15 as support, synthesized with different silica sources (TEOS - tetraortosilicate and rice husk ash - CCA). The metals were impregnated wet method using metal salts as precursors. The molecular sieves SBA-15TEOS and SBA-15CCA were characterized by X-ray diffraction (XRD), X-ray Spectrometry Energy Dispersive (EDX), Scanning Electron Microscopy (SEM) and Physical Adsorption Capacity of Nitrogen (BET). The Fe/Cu/K/SBA-15TEOS and Fe/Cu/K/SBA-15CCA catalysts were characterized by X-ray diffraction (XRD), X-ray Spectrometry Energy Dispersive (EDX), Physical Adsorption Capacity of Nitrogen (BET) and Temperature Programmed Reduction (TPR). From the results obtained, the molecular sieve SBA15CCA resembled the SBA-15TEOS, being characterized as mesoporous materials typical morphology, but with different results of specific area (490 m2/g for SBA15TEOS and 112 m2/g for SBA- 15CCA). The catalysts showed compositions of sílica, iron, potassium and copper in pre-defined and good dispersion of the molecular sieve, which retained its mesoporous structure proportions, but with reduced specific area after impregnation (257.3 m2/g for Fe/Cu/K/SBA-15TEOS 91.7 m2/g for Fe/Cu/K/SBA-15CCA); By the TPR results, it was possible to check the temperature ranges typical reduction of iron oxides phases and the influence of copper in this process. The catalytic reviewed in Fischer-Tropsch synthesis was satisfactory molar ratio H2/CO of 1:1, the converging high fractions of liquid hydrocarbons. The catalyst Fe/Cu/K/SBA-15TEOS provided excellent conversion to hydrocarbons heavier fractions C10+ (78.18%); Fe/Cu/K/SBA-15CCA catalyst showed moderate conversion to liquid hydrocarbons C5+ (54.47%).