STUDIES ON KINETICS OF AMMONIA-SYNTHESIS OVER RUTHENIUM CATALYST SUPPORTED ON ACTIVE-CARBON

Citation
Z. Kowalczyk et al., STUDIES ON KINETICS OF AMMONIA-SYNTHESIS OVER RUTHENIUM CATALYST SUPPORTED ON ACTIVE-CARBON, Applied catalysis. A, General, 138(1), 1996, pp. 83-91
Citations number
23
Categorie Soggetti
Chemistry Physical","Environmental Sciences
ISSN journal
0926860X
Volume
138
Issue
1
Year of publication
1996
Pages
83 - 91
Database
ISI
SICI code
0926-860X(1996)138:1<83:SOKOAO>2.0.ZU;2-6
Abstract
The rate of ammonia synthesis was measured for ruthenium and iron cata lysts under high (100 bar) and under atmospheric pressures. The effect of ammonia concentration in the gas phase on reaction rate was measur ed at 400, 430, and 470 degrees C for p = 100 bar at 370 and 400 degre es C for p = 1 bar. It was found that ruthenium is less sensitive than iron to the increase of ammonia pressure in the gas phase. It is also much less sensitive to changes in the total pressure (for p(H2):p(N2) = const.). At relatively high conversion degrees the ruthenium cataly st used was several times more active than the fused iron catalyst at 100 bar and 25-40 times more active under atmospheric pressure.