Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/3274
Título: Separation of branched hexane isomers on zeolite BETA
Autor: Bárcia, Patrick da Silva
Silva, José A.C.
Rodrigues, A.E.
Palavras-chave: Adsorption
Data: 2007
Editora: Multi Science
Citação: Barcia, Patrick; Silva, Jose A. C. ; Rodrigues, Alirio (2007). Separation of branched hexane isomers on zeolite BETA. Adorption Science & Technology. ISSN 0263-6174. 25:3-4, p.169-183.
Resumo: An experimental study of the single, binary, ternary and quaternary fixed bed adsorption of hexane isomers onto zeolite BETA was performed covering the temperature range between 423 K and 523 K and partial pressures up to 0.3 bar. Adsorption equilibrium isotherms were collected from breakthrough experiments. Based on an analysis of sorption events at the molecular level, a Tri-Site Langmuir model (TSL) was developed to interpret the equilibrium data with good accuracy. At the partial pressures studied, it was found that the degree of branching was related to the affinity; the sorption hierarchy was most favourable towards the linear isomer and least favourable towards the di-branched ones. A mathematical model based on a linear driving force (LDF) was developed and used to test the experimental data. It was found that the model predicted the behaviour of the fixed bed experiments with good accuracy. Zeolite BETA demonstrated significant selectivity between branched C-6 isomers (especially at low coverage), thereby suggesting a means of solving this difficult separation problem.
Peer review: yes
URI: http://hdl.handle.net/10198/3274
DOI: 10.1260/026361707782398173
ISSN: 0263-6174
Aparece nas colecções:CIMO - Artigos em Revistas Indexados à WoS/Scopus

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