Catalytic action of natural iron–manganese ores on the process of ammonia removal form producer gas

The applicability of iron–manganese catalysts (ores of natural origin) with different ratios between iron and manganese to the decomposition of ammonia in producer gas from coal gasification is considered. The results of experimental studies in this area are presented. It was established that all of the test ores were the catalysts of ammonia decomposition at 400–750°C with a total degree of 0.92–0.995 or higher. The best result of 0.997 was obtained on the catalyst containing 50.5 wt % manganese and 1.3 wt % iron. However, a specific regularity in the effect of the iron and manganese content of the ores on the degree of ammonia removal was not revealed. It was hypothesized that the textural and structural characteristics of the catalyst affect the efficiency of ammonia removal.