Relation between acid and catalytic properties of chlorinated γ-alumina -: A 31P MAS NMR and FTIR investigation

被引：21

作者：

Guillaume, D ^{[1
]}

Gautier, S ^{[1
]}

Alario, F ^{[1
]}

Devès, JM ^{[1
]}

机构：

[1] Inst Francais Petr, F-92852 Rueil Malmaison, France

来源：

OIL & GAS SCIENCE AND TECHNOLOGY-REVUE D IFP ENERGIES NOUVELLES | 1999年 / 54卷 / 04期

关键词：

NMR; infrared TMP; thermodesorption; acid sites; strength distribution; gamma alumina; chlorine; catalytic properties; cracking reactions;

D O I：

10.2516/ogst:1999046

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In this paper, we have studied the effect of chlorine on the surface properties of gamma-alumina, especially on their acid properties. The use of FTIR spectroscopy and P-31 MAS NMR of adsorbed trimethylphosphine allows to propose a chlorination mechanism. To correlate the surface properties of these chlorinated gamma-alumina with their catalytic properties, we have used a model reaction, the cracking of n-heptane under reforming conditions. The analysis of the correlation between acid properties determined by P-31 MAS NMR and the catalytic results (in terms of activities and selectivities) allows to identify which sites are involved in the cracking reaction.

引用

页码：537 / 545

页数：9

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