Kinetic Studies of Ammonia Formation over Fe and Mo Containing HZSM-5 Catalysts

R. B. Unde and A. G. Gaikwad

Abstract
The direct reduction of nitrogen with hydrogen over iron and/or molybdenum containing HZSM-5 catalysts was carried out at different mole ratio of nitrogen and hydrogen. The effect of temperature from 575 K to 773 K was carried out on direct reduction of nitrogen with hydrogen. The loading of Fe and Mo on catalyst was varied from 1 to 10 % in order to explore the effect of the bimetallic combination in the presence of each other on ammonia synthesis. The rate of reduction of bimetallic catalyst with hydrogen in the process of preparation of reduced catalyst was determined. It was observed that the reduction of iron and molybdenum depends on their proportion loaded on H-ZSM-5. The rate of direct reduction of nitrogen over the catalyst by hydrogen has been determined. The results show that the rate of ammonia formation on reduced catalyst depends on the combination of the proportion of Fe and Mo in the catalyst.

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Keywords
Kinetic studies, ammonia synthesis, supported catalyst, iron and molybdenum