Effect of Iron Compounds on Coal Combustion Characteristics
Liu Yanhua, Che Defu, Li Yintang, Hui Shi'en, Xu Tongmo
(Xi'an Jiaotong University, Xi'an 710049, China)

Abstract: The effects of ferric/ferrous chloride and ferric oxide on the combustion characteristics of coal are investigated by using thermogravimetry and MSI compact gas analyzer. The experimental results show that iron compounds can intensify coal combustion reactions in the relatively low temperature zone. The prevailing mechanism is that ferric and ferrous chlorides behave like catalysts to change the chemical reaction kinetics for promoting the combustion process. The catalyzing function increases with the content fraction of ferric and ferrous chlorides in the coal. Ferric oxide in the coal exerts a negligible influence on the coal combustion.
Keywords: ferric chloride;ferrous chloride;coal combustion;ferric oxide.