PATHWAY FOR THE CATALYTIC CONVERSION OF CARBOXYLIC-ACIDS TO HYDROCARBONS OVER ACTIVATED ALUMINA

被引：65

作者：

LEUNG, A ^{[1
]}

BOOCOCK, DGB ^{[1
]}

KONAR, SK ^{[1
]}

机构：

[1] UNIV TORONTO,DEPT CHEM ENGN & APPL CHEM,TORONTO,ON M5S 1A4,CANADA

来源：

ENERGY & FUELS | 1995年 / 9卷 / 05期

关键词：

D O I：

10.1021/ef00053a026

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：

Pure saturated carboxylic acids ranging from C-4 to C-12 were pyrolyzed at a WHSV of approximate to 0.46 h(-1) over activated alumina at 450 degrees C and atmospheric pressure. The carboxylic acids produced symmetrical ketones that further degraded to methyl ketones and hydrocarbons presumably via a gamma-hydrogen transfer mechanism. The lower molar mass carboxylic acids yielded greater percentages of symmetrical ketones than the higher molar mass carboxylic acids. The organic liquid pyrolysate of butanoic acid (C-4) contained 78% 4-heptanone whereas the organic liquid pyrolysate of dodecanoic acid (C-12) contained negligible amounts of diundecyl ketone and greater percentages of hydrocarbons. Further pyrolysis of ketone-containing product yielded hydrocarbons. Similar compositions of the pyrolytic products from dodecanoic acid and diundecyl ketone revealed that virtually all of the carboxylic acid degraded to hydrocarbons via the symmetrical ketone. Monoenes were the major hydrocarbon products from ketones and were formed by gamma-hydrogen transfer rearrangement, and/or reduction (disproportionation) to alcohol followed by dehydration. Methyl ketones had a distinct preference for reduction to monoenes (containing the same number of carbon atoms) following the latter route.

引用

页码：913 / 920

页数：8

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