文献类型：期刊文献

英文题名：Synergistic hydro-modification of low-rank coal with syngas and hydrogen-donor solvents for caking property enhancement

作者：Zhou, Jie[1,2];Cao, Song[1,2];Huang, Sheng[1,2];Wu, Youqing[1,2];Wu, Shiyong[1,2]

机构：[1]State Key Lab Coal Liquificat Gasificat & Utilizat, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Resource Utilizat Carbon containing W, Minist Educ, Shanghai 200237, Peoples R China

年份：2026

卷号：414

外文期刊名：FUEL

收录：;EI(收录号：20260319939751);WOS:【SCI-EXPANDED(收录号:WOS:001674366400001)】；

基金：This research was supported by the National Natural Science Foun-dation of China (22378129) , Fundamental and Interdisciplinary Disci-plines Breakthrough Plan of the Ministry of Education of China

语种：英文

外文关键词：Low-rank coal; Syngas with different CO contents; Hydro-modification; Hydrogen-donating ability; Mild conditions

摘要：Hydro-modification of low-rank coal using syngas and hydrogen-donor solvents (containing some water) was investigated to enhance its caking property. The effects of temperature, atmosphere, and solvent hydrogendonating ability (evaluated by proton donor quality index, PDQI) on the caking index (GRI) and the influence of specific components of modified coal on GRI were systematically studied. Results indicated that the GRI first increased and then decreased with temperature. A synergistic effect between H2 and a small proportion of CO (20 vol%) in syngas (SNG) maximized CO conversion and increased the content of caking components (asphaltenes AS and pre-asphaltenes PA). The GRI correlated positively with solvent PDQI in the range of 9-21, but declined when PDQI exceeded 21, because excessively high PDQI will lead to further hydrogenation of the caking substances into non-caking oil, water and gas. Hydrogen from solvent playing a more critical role than gaseous hydrogen. PA contributed more significantly to caking property than AS, THF-IS has not caking property, and the dispersion state of caking components was identified as a key factor affecting GRI. Under optimized conditions (350 degrees C, SNG, reaction pressure 8-10 MPa, solvent PDQI 12-18), a high GRI of 70-78 and a yield of approximately 93.6 % were achieved. This work demonstrates a mild and effective pathway for upgrading lowrank coal into caking coal.