A KINETIC FEATURE OF CATALYTIC GASIFICATION OF CARBONS - ACTIVATION OF NICKEL AND IRON CATALYSTS DURING GASIFICATION

被引：13

作者：

NISHIYAMA, Y

HAGA, T

TAMURA, O

SONEHARA, N

机构：

[1] Chemical Research Institute of Nonaqueous Solutions, Tohoku University, Sendai, 980, 1-1

来源：

CARBON | 1990年 / 28卷 / 01期

关键词：

carbon gasification; catalysis; rate increase;

D O I：

10.1016/0008-6223(90)90112-C

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：

A unique rate increase with time in catalytic gasification of carbons by hydrogen was examined as to its dependence on reaction conditions, catalyst species, carbon substrates and so on, to clarify the reason of the phenomenon. It was marked with a porous substrate at relatively low temperature when nickel or iron was the main catalyst. By heating carbon substrate in hydrogen at 850 to 900°C before catalyst impregnation, the rate increase disappeared. Comparing several possible explanations, it is concluded that the rate increase with conversion is due to the recovery of metal catalyst from deactivation caused by heteroatoms on carbon surface. The hydrogen pretreatment resulted in a high rate of gasification with hydrogen as well as steam. © 1990.

引用

页码：185 / 191

页数：7

共 37 条

[21] GASIFICATION OF COALS TREATED WITH NON-AQUEOUS SOLVENTS .2. EFFECT OF LIQUID-AMMONIA TREATMENT ON GASIFICATION WITH HYDROGEN [J].