1S H Kelemen, G N C, eorge, M I. Gorbaly. Direet determination and quantifieatiop of sulphur forms in heavy petroleum and coalsl. The X - ray photoeleetron spectroscopy (XPS) approach [J] .fuel, 1990, 69 (8):939 -944.
8J Casanovasa, J M Ricarta, Francesc lliasbf, etc. The interpretation of X - ray photoelectron spectra of pyrolized S - containing carbonaceous materials [ J ] . fuel, 1997, 76: 1347-1352.
9W H Calkins, R J Torres - Ordonez, Bongjin Jung, etc. Comparison of Pyrolytic and X - ray Spectroscopic Methods for Determining Organic Sulfur Species in Coal [J] .energy & fuels, 1992, 6:411 -413.
8[7]Yasuo Ohtsuka. Rate enhancement and in-situ desulphurization bu iron-calcium catalyst in the gasification of coalchar[J]. Nenryo Kyokai-Shi. 1987, 66(2):1031~1036
9Meffe S, Perkson A, Trass O. Coal I3enefication and Organic Sulfur Removal. Fuel, 1996, 75 (1): 25--30.
10Amir Attar. Chemistry, Thermodynamics and Kinetics of Reactions of Sulphur in Coal Gas Reactions: A Review. Fuel,1978, 57 (4): 201 --212.