SUPPORT AND PROMOTER EFFECT OF RUTHENIUM CATALYST .3. KINETICS OF AMMONIA-SYNTHESIS OVER VARIOUS RU CATALYSTS

被引：172

作者：

AIKA, K ^{[1
]}

KUMASAKA, M ^{[1
]}

OMA, T ^{[1
]}

KATO, O ^{[1
]}

MATSUDA, H ^{[1
]}

WATANABE, N ^{[1
]}

YAMAZAKI, K ^{[1
]}

OZAKI, A ^{[1
]}

ONISHI, T ^{[1
]}

机构：

[1] GIFU VOCAT TRAINING COLL, IBIGUN, GIFU, JAPAN

来源：

APPLIED CATALYSIS | 1986年 / 28卷 / 1-2期

关键词：

KINETIC PARAMETERS - PROMOTER EFFECT - RATE DETERMINING STEP;

D O I：

10.1016/S0166-9834(00)82492-6

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：

Ammonia synthesis over Ru powder, Ru/Al//2O//3, Ru-CsOH/Al//2O//3, Ru-CsOH, Ru/MgO, and Ru-CsOH/MgO was studied kinetically under 79 kPa (600 torr) at around 598 K. The kinetic expression was found to be affected markedly by the kind of support or promoter. The reaction order in N//2 was unity for all the catalysts. However, the order in NH//3 was negative and that in H//2 was positive for Ru/Al//2O//3 and Ru/MgO, while the orders were near zero and negative respectively for other catalysts. It is shown that N//2 adsorption is the rate determining step, and that the reaction is retarded by the different adsorbed species the nature of which depends upon the kind of support and promoter.

引用

页码：57 / 68

页数：12

共 23 条

[1] SUPPORT AND PROMOTER EFFECT OF RUTHENIUM CATALYST .1. CHARACTERIZATION OF ALKALI-PROMOTED RUTHENIUM ALUMINA CATALYSTS FOR AMMONIA-SYNTHESIS [J].