کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
75709 49122 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of Si/Al ratio on hexane isomers adsorption equilibria
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Influence of Si/Al ratio on hexane isomers adsorption equilibria
چکیده انگلیسی

In this work we aim to have a better knowledge of the influence of silica/alumina ratio (SAR) on the adsorption equilibrium of hexane isomers on MFI zeolites. With a manometric set-up coupled with a micro-calorimeter we did address adsorption properties and heats of adsorption of n-hexane, 2-methylpentane, 2,2-dimethylbutane and 2,3-dimethylbutane on three samples with different Si/Al ratio. The branched isomers all show a type I isotherm on the three samples, while n-hexane presents a dual site for SAR 1600 and 100, and type I for SAR 50. The Si/Al ratio has a large influence on the adsorption equilibrium properties, in addition the Henry’s constant and initial heats of adsorption increase with aluminium content. The saturation loading decreases with the increasing aluminium content. The differential heat of adsorption of n-hexane increases slightly with loading, whereas the heat of adsorption of branched hexanes presents a decrease with loading. The three MFI zeolite samples present equilibrium selectivity towards n-hexane.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 111, Issues 1–3, 15 April 2008, Pages 171–177
نویسندگان
, , , ,