57. Development of Iron-based Catalyst for Direct Coal Liquefaction : The Properties of Limonite Ore and its Liquefaction Activity

Abstract

The properties of limonite ore were investigated in relation to the catalytic activity for the direct coal liquefaction. α-FeOOH and α-Fe_2O_3 were observed in some limonite ores by powder x-ray diffraction and Mossbauer spectroscopy analysis. A molecule ratio of H_2O/Fe was calculated from iron content and the weight loss during the heating of limonite ore. It was found that the excellent catalytic activity was indicated with a specific limonite ore which had a high molecule ratio of H_2O/Fe with no content of α-Fe_2O_3.