Ru/MgO sol-gel prepared catalysts for ammonia synthesis

被引：34
作者：
Moggi, P
Predieri, G
Maione, A
机构：
[1] Univ Parma, Dept Organ & Ind Chem, I-43100 Parma, Italy
[2] Univ Parma, Dept Gen & Inorgan Chem, I-43100 Parma, Italy
[3] Catholic Univ Louvain, Dept Chem, B-1348 Louvain, Belgium
来源：
CATALYSIS LETTERS | 2002年 / 79卷 / 1-4期
关键词：
ruthenium-based catalyst; preparation; characterization; sol-gel; ammonia synthesis;
D O I：
10.1023/A:1015340200507
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 new method of preparation of alkali-promoted Ru/MgO catalysts, based on a sol-gel procedure, starting from magnesium ethoxide, Ru-3(CO)(12) and a cesium compound has been designed. The gels were subjected to an activation/reduction procedure to substantially obtain Ru-CsOH/MgO. The activated catalysts were tested in ammonia synthesis at atmospheric pressure. It was clear that the sol-gel prepared Cs-promoted Ru/MgO catalysts are much more active, under the same reaction conditions, than the analogous catalysts prepared by impregnation procedures.
引用
收藏
页码：7 / 15
页数：9
相关论文
共 7 条
[1]  
Di Silvestri F, 1998, STUD SURF SCI CATAL, V118, P219
[2]   SURFACE ORGANOMETALLIC CHEMISTRY - CHEMISORPTION AND THERMODECOMPOSITION OF RU3(CO)12 ON PARTIALLY HYDROXYLATED MAGNESIA AND RELATED OXIDES [J].
DORNELAS, L ;
THEOLIER, A ;
CHOPLIN, A ;
BASSET, JM .
INORGANIC CHEMISTRY, 1988, 27 (07) :1261-1265
[3]  
Jennings J. R., 1991, CATALYTIC AMMONIA SY
[4]   SYNTHESIS OF MAGNESIUM-OXIDE BY THE SOL-GEL METHOD - EFFECT OF THE PH ON THE SURFACE HYDROXYLATION [J].
LOPEZ, T ;
GARCIACRUZ, I ;
GOMEZ, R .
JOURNAL OF CATALYSIS, 1991, 127 (01) :75-85
[5]  
Moggi P., 1999, APPL CATAL A-GEN, V182, P257
[6]   Ruthenium catalysts for ammonia synthesis at high pressures: Preparation, characterization, and power-law kinetics [J].
Rosowski, F ;
Hornung, A ;
Hinrichsen, O ;
Herein, D ;
Muhler, M ;
Ertl, G .
APPLIED CATALYSIS A-GENERAL, 1997, 151 (02) :443-460
[7]   SURFACE CHARACTERIZATION OF THE RU3(CO)12/AL2O3 SYSTEM .1. INTERACTION WITH THE HYDROXYLATED SURFACE [J].
ZECCHINA, A ;
GUGLIELMINOTTI, E ;
BOSSI, A ;
CAMIA, M .
JOURNAL OF CATALYSIS, 1982, 74 (02) :225-239
1