The Effects of Catalysts on the Mean Structure of Solvent-Refined Coal in Coal Liquefaction

Article abstract of DOI:10.1246/bcsj.60.653

The effects of MoO3, Fe2O3, or SnO on the conversion and the solvent-refined coal (SRC) yield of Taiheiyo coal were small, whereas their effects on the structure of SRC were large.SRC wass separated into four fractions by successive extraction in order to clarify the differences in SRC's among the catalysts.The formation of SnO2 after the liquefaction was confirmed.It was considered that the oxygen-abstraction ability and the radical-stabilization ability of SnO prevented the retrogressive reaction of coal, SRC, and model compounds.MoO3 and Fe2O3 have a higher ability to hydrogenate and accelerate the hydrocracking of coal and coal-model compounds than does SnO, but their ability to suppress the retrogressive reaction producing heavier compounds is small.