SELECTIVE CONVERSION OF DECANE INTO BRANCHED ISOMERS - A COMPARISON OF PLATINUM/ZSM-22, PLATINUM/ZSM-5 AND PLATINUM USY ZEOLITE CATALYSTS

被引：176

作者：

MARTENS, JA ^{[1
]}

PARTON, R ^{[1
]}

UYTTERHOEVEN, L ^{[1
]}

JACOBS, PA ^{[1
]}

FROMENT, GF ^{[1
]}

机构：

[1] STATE UNIV GHENT, PETROCHEM TECH LAB, B-9000 GHENT, BELGIUM

来源：

APPLIED CATALYSIS | 1991年 / 76卷 / 01期

关键词：

BETA-SCISSION; DECANE; HYDROCRACKING; HYDROGENOLYSIS; ISOMERIZATION; PORE MOUTH; ZEOLITES;

D O I：

10.1016/0166-9834(91)80007-J

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：

Detailed product distributions from the bifunctional conversion of decane over Pt/ZSM-22, Pt/ZSM-5 and Pt/USY catalysts are compared. In contrast to other zeolites, the product selectivities from decane on Pt/ZSM-22 vary largely with the reaction conditions. Pt/ZSM-22 produces high yields of feed isomers under mild reaction conditions. Molecular graphics suggest that the isomerisation of decane cannot occur entirely inside the micropores of ZSM-22 crystals. It is suggested that isomerisation of decane on ZSM-22 is an example of zeolite pore-mouth catalysis. Type C hydrocracking of methylnonanes (involving beta-scission of secondary into secondary alkylcarbenium ions) does not occur on Pt/ZSM-22, due to the limited access of these molecules in the zeolite pores. Hydrogenolysis on the platinum metal and type D hydrocracking of decane (involving beta-scission of secondary into primary alkylcarbenium ions) account for the formation of cracked products.

引用

页码：95 / 116

页数：22

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