High-temperature low-pressure adsorption of branched C5-C8 alkanes on zeolite beta, ZSM-5, ZSM-22, zeolite Y, and mordenite

被引：214

作者：

Denayer, JF

Souverijns, W

Jacobs, PA

Martens, JA

Baron, GV

机构：

[1] Free Univ Brussels, Dept Chem Engn, B-1050 Brussels, Belgium

[2] Katholieke Univ Leuven, Ctr Surface Chem & Catalysis, B-3001 Heverlee, Belgium

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1998年 / 102卷 / 23期

关键词：

D O I：

10.1021/jp980674k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Henry constants, low-coverage adsorption enthalpies, van't Hoff preexponential factors, and separation factors of C-5-C-8 alkanes are determined on beta, ZSM-5, ZSM-22, mordenite, and Y zeolites at 473-648 K using tracer and perturbation chromatographic techniques. Three different adsorption behaviors were encountered depending on the zeolite type: (1) nonselective competitive adsorption of isoalkanes and n-alkanes inside the micropores (zeolite Y), (2) preferential adsorption of the n-alkanes over the isoalkanes inside the micropores (beta, ZSM-5 and mordenite), and (3) selective adsorption of the n-alkanes in the micropores and of the isoalkanes on the external crystal surfaces (ZSM-22). Linear and mono-and multibranched alkanes can be separated on columns of ZSM-22 and beta zeolites.

引用

页码：4588 / 4597

页数：10