Utilize este identificador para referenciar este registo: https://hdl.handle.net/10216/99576
Autor(es): Patrick S. Bárcia
José A. C. Silva
Alírio E. Rodrigues
Título: Separation of branched hexane isomers on zeolite BETA
Data de publicação: 2007
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.
Descrição: 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 C6 isomers (especially at low coverage), thereby suggesting a means of solving this difficult separation problem.
Assunto: Engenharia química, Engenharia química
Chemical engineering, Chemical engineering
Áreas do conhecimento: Ciências da engenharia e tecnologias::Engenharia química
Engineering and technology::Chemical engineering
URI: https://hdl.handle.net/10216/99576
Tipo de Documento: Artigo em Revista Científica Internacional
Condições de Acesso: restrictedAccess
Aparece nas coleções:FEUP - Artigo em Revista Científica Internacional

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
56656.pdf
  Restricted Access
943.69 kBAdobe PDF    Request a copy from the Author(s)


Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.