CALORIMETRIC AND CATALYTIC INVESTIGATION OF ALKANES REACTIVITY OVER A VARIETY OF MFI STRUCTURES

被引:16
作者
AUROUX, A [1 ]
TUEL, A [1 ]
BANDIERA, J [1 ]
BENTAARIT, Y [1 ]
GUIL, JM [1 ]
机构
[1] CSIC,INST QUIM FIS ROCASOLANO,E-28006 MADRID,SPAIN
关键词
ALKANE ADSORPTION; CRACKING; MICROCALORIMETRY; SUBSTITUTED MFI; ZEOLITES;
D O I
10.1016/0926-860X(93)85192-R
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
Various substituted MFI zeolites have been investigated using adsorption microcalorimetry of different alkanes. The acid strength of the zeolite protons decreased following the sequence H-Al-MFI > H-Ga-MFI > H-Fe-MFI. The heats of adsorption decreased with the basicity of the alkane in the order n-butane > isobutane > propane. The variation of cracking selectivity in the conversion of alkanes was correlated with the basicity of the C-C bond. The selectivity towards dehydrogenation was related to the increased basicity of the C-H bond or to the attenuation of the acid strength of the zeolite.
引用
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页码:181 / 190
页数:10
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