Research progress and prospect of sulfur migration and transformation in coal liquefaction residue
Chang Weike
Xu Jie
Sun Wei
Chen Shengli
Zhang Shengzhen
Abstract：Based on the research status of sulfide migration and transformation in coal liquefaction residue,the origin and distribution of sulfur in coal liquefaction residue were introduced.The migration and transformation process of sulfide in coal liquefaction residue during hydrogenation,gasification,pyrolysis and combustion were summarized.The influencing factors of sulfur conversion were described,and the development prospect of sulfur migration and transformation in coal liquefaction residue was forecasted.The results show that sulfur in inorganic minerals is gradually convertes to organic sulfur,and H2S is the important medium in the conversion process.The gaseous sulfides,such as H2 S,CS2 and SO2,are the main gaseous by-products during the conversion of coal liquefaction residue.Part of the sulfide is converted to macromolecular organic sulfur as the secondary product,affecting the quality and use of products.In order to rationally and effectively utilize the coal liquefaction residue,it is necessary to develop new approaches for converting inorganic sulfur into elemental sulfur or macromolecule organic sulfur.The recycling of gas sulfide and development of new coal liquefaction catalyst with less elemental sulfur additive are feasible.
Keywords：coal liquefaction residuesulfurconversionsulfide
Publication Date：2017-01-01