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Previous issue date: 2013-07-31 / The underground natural gas found associated or not with oil is characterized
by a mixture of hydrocarbons and residual components such as carbon dioxide
(CO2), nitrogen gas (N2) and hydrogen sulfide (H2S), called contaminants. The H2S
especially promotes itself as a contaminant of natural gas to be associated with
corrosion of pipelines, to human toxicity and final applications of Natural Gas (NG).
The sulfur present in the GN must be fully or partially removed in order to meet the
market specifications, security, transport or further processing. There are distinct and
varied methods of desulfurization of natural gas processing units used in Natural Gas
(UPGN). In order to solve these problems have for example the caustic washing,
absorption, the use of membranes and adsorption processes is costly and great
expenditure of energy. Arises on such findings, the need for research to active
processes of economic feasibility and efficiency. This work promoted the study of the
adsorption of sulfide gas in polymer matrices hydrogen pure and modified. The
substrates of Poly(vinyl chloride) (PVC), poly(methyl methacrylate) (PMMA) and
sodium alginate (NaALG) were coated with vanadyl phosphate compounds
(VOPO4.2H2O), vanadium pentoxide (V2O5), rhodamine B (C28H31N2O3Cl) and ions
Co2+ and Cu2+, aiming to the adsorption of hydrogen sulfide gas (H2S). The
adsorption tests were through a continuous flow of H2S in a column system (fixed
bed reactor) adsorption on a laboratory scale. The techniques used to characterize
the adsorbents were Infrared spectroscopy (FTIR), thermogravimetry analysis (TGA),
X-ray fluorescence (XRF), the X-ray diffraction (XRD) electron microscopy (SEM).
Such work indicates, the results obtained, the adsorbents modified PMMA, PVC and
NaALG have a significant adsorptive capacity. The matrix that stood out and had the
best adsorption capacity, was to ALG modified Co2+ with a score of 12.79 mg H2S / g
matrix / O g?s natural encontrado no subsolo associado ou n?o ao petr?leo se
caracteriza por uma mistura de hidrocarbonetos e componentes residuais tais como
o di?xido de carbono (CO2), o g?s nitrog?nio (N2) e o sulfeto de hidrog?nio (H2S),
denominados de contaminantes. O H2S em especial se promove como contaminante
do g?s natural por estar associado ? corros?o de dutos (gasodutos), ? toxidade
humana e a aplica??es finais do G?s Natural (GN). O teor de enxofre presente no
GN deve ser totalmente ou parcialmente removido, visando atender as
especifica??es de mercado, seguran?a, transporte ou processamento posterior. H?
distintos e variados m?todos de dessulfuriza??o do g?s natural usados nas
Unidades de Processamento do G?s Natural (UPGN). Visando solucionar tais
problemas temos como exemplo a lavagem c?ustica, a absor??o, o uso de
membranas e a adsor??o, sendo processos onerosos e com grande disp?ndio
energ?tico. Surge, diante de tais constata??es, a necessidade de pesquisa de
processos ativos de viabilidade econ?mica e efici?ncia. O presente trabalho
promoveu o estudo da adsor??o do g?s sulfeto de hidrogr?nio em matrizes
polim?ricas puras e modificadas. Os substratos de Poli(cloreto de vinila) (PVC),
Poli(metacrilato de metila) (PMMA) e alginato de s?dio (NaALG), foram recobertos
com os compostos de fosfato de vanadila (VOPO4.2H2O), pent?xido de van?dio
(V2O5), rodamina B (C28H31N2O3Cl) e os ?ons Co2+ e Cu2+, objetivando-se a adsor??o
do g?s sulfeto de hidrog?nio (H2S). Os ensaios de adsor??o se deram atrav?s de um
fluxo cont?nuo de H2S em um sistema de coluna (reator de leito fixo) de adsor??o em
escala de laborat?rio. As t?cnicas utilizadas para a caracteriza??o dos adsorventes
foram ? espectroscopia de infravermelho (FTIR), a an?lise termogravimetria (TG), a
fluoresc?ncia de raios X (FRX), o difra??o de raios X (DRX), a microscopia eletr?nica
de varredura (MEV). Tal trabalho indica, pelos resultados obtidos, que os
adsorventes modificados de PMMA, PVC e NaALG t?m uma capacidade adsortiva
significativa. A matriz que se destacou e apresentou a melhor capacidade de
adsor??o, foi a de ALG modificada com Co2+ tendo um resultado de 12,79 mg de
H2S/g de matriz
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/17710 |
| Date | 31 July 2013 |
| Creators | Oliveira, Marconi Sandro Franco de |
| Contributors | CPF:59668741404, http://lattes.cnpq.br/6868773742105583, Barros, Br?ulio Silva, CPF:00735018405, Motta, Fabiana Villela da, CPF:24779953839, http://lattes.cnpq.br/9918299069511517, Menezes, Jorge Fernando Silva de, CPF:56967950487, http://lattes.cnpq.br/7799441763950977, Farias, Robson Fernandes de |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Qu?mica, UFRN, BR, F?sico-Qu?mica; Qu?mica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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