AMMONIA-SYNTHESIS OVER ALUMINA AND MAGNESIA SUPPORTED RUTHENIUM - COMPARATIVE KINETIC-STUDY OF THE PROMOTIVE ACTION OF METALLIC AND IONIC POTASSIUM

被引：24

作者：

BARIS, H ^{[1
]}

GLINSKI, M ^{[1
]}

KIJENSKI, J ^{[1
]}

WOKAUN, A ^{[1
]}

BAIKER, A ^{[1
]}

机构：

[1] SWISS FED INST TECHNOL, DEPT IND & ENGN CHEM, CH-8092 ZURICH, SWITZERLAND

来源：

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

关键词：

ALUMINA - CATALYSTS - Supported - POTASSIUM AND ALLOYS;

D O I：

10.1016/S0166-9834(00)82512-9

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：

The influence of metallic potassium (K) and KNO//3 promoters on the ammonia synthesis kinetics over Al//2O//3 and MgO supported ruthenium has been investigated in a fixed-bed reactor at 500 - 725 K and 150 kPa. Promotion with K increased the turnover frequency (TOF) of the Al//2O//3 supported Ru about 90 times and TOF of the MgO supported Ru about 60 times at 623 K. The KNO//3 promoter precursor, which is suggested to be transformed to KOH during reduction, exhibited a comparatively small effect on the ammonia synthesis activities of these catalyst systems. Ammonia synthesis rates were about first order with respect to nitrogen over both promoted and unpromoted systems.

引用

页码：295 / 301

页数：7

共 9 条

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