A comparative study on deposited and mixed iron oxide catalysts for hydrogenation of coal

Abstract

The activity and selectivity of two modes of using iron oxide catalysts for hydrogenation of coal have been compared. In one mode of application, the hydrated oxide of iron was deposited on coal by keeping it suspended in the aqueous solution of an iron salt and adding ammonium hydroxide to it. In the other case, the hydrated oxide was precipitated under exactly similar conditions in the absence of coal and was mixed with the powdered coal. For the same concentration of iron and under identical conditions of reaction, the overall efficiency of the deposited form of catalyst was found to be superior to the mixed type.