Studies on the equilibrated thermodesorption of <Emphasis Type="Italic">n</Emphasis>-hexane from ZSM-5 zeolite |
| |
Authors: | Dorota Majda Wacław Makowski |
| |
Institution: | 1.Centro de Investiga??o em Química, Departamento de Química,Faculdade de Ciências da Universidade do Porto,Porto,Portugal;2.Instituto de Ciências Biomédicas Abel Salazar, ICBAS,Universidade do Porto,Porto,Portugal |
| |
Abstract: | Equilibrated thermodesorption (TPED) and quasi-equilibrated temperature programmed desorption and adsorption (QE-TPDA) were
employed as methods for studying the influence of different extraframework cations (Na+, K+, Li+, Cu2+, Zn2+, or Mg2+) on adsorption of n-hexane on ZSM-5 zeolite with high Al content (Si/Al = 15). Considerable influence of the cations on both
initial adsorption in the micropores and ordering of the adsorbed molecules, occurring at high coverages, has been observed.
This influence is reflected by the values of the adsorption enthalpy and entropy, determined by fitting the dual site Langmuir
(DSL) adsorption function to the equilibrated thermodesorption profiles. However, no clear correlation between the determined
parameters and properties of the extraframework cations could be found. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|