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Separation of branched hexane isomers using zeolite BEA for the octane improvement of gasoline pool
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Orientador(es)
Resumo(s)
A sorption study of single, binary, ternary and quaternary mixtures of hexane (C6) isomers nhexane (nHEX), 3-methylpentane (3MP), 2,3-dimethylbutane (23DMB) and 2,2-
dimethylbutane (22DMB) was performed in commercial pellets of zeolite BETA (BEA
structure), covering the temperature range between 423 K and 523 K and partial pressures up to 0.3 bar. From these data, single and multicomponent adsorption equilibrium isotherms were collected. An extended tri-site Langmuir model (TSL) was developed to interpret accurately the equilibrium data, and a dynamic adsorption model was developed and tested predicting with a good accuracy the behaviour of multicomponent fixed bed experiments. At
the partial pressures studied, the sorption hierarchy in the zeolite BETA is: nHEX>3MP>23DMB>22DMB. BEA structure demonstrates a significant selectivity between C6 isomers, especially at low coverage, giving a good perspective regarding future work
Descrição
Palavras-chave
Adsorption Hexane isomers
Contexto Educativo
Citação
Bárcia, Patrick; Silva, José A.C.; Rodrigues, Alirio (2007). Separation of branched hexane isomers using zeolite BEA for the octane improvement of gasoline pool. Studies in Surface Science and Catalysis. p. 955-960.