文献类型：期刊文献

英文题名：Product distribution and free radical reaction behavior during coal liquefaction in solvents with different hydrogen donor indexes

作者：Zhang, Yuanlin[1,2];Sun, Shuo[1,2];Huang, Sheng[1,2];Wu, Shiyong[1,2];Wu, Youqing[1,2]

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

年份：2025

卷号：120

外文期刊名：JOURNAL OF THE ENERGY INSTITUTE

收录：;EI(收录号：20250817917024);WOS:【SCI-EXPANDED(收录号:WOS:001432095100001)】；

基金：This work was supported by National Key R & D Program of China (2022YFB4101300) and National Natural Science Foundation of China (22378129) .

语种：英文

外文关键词：Direct coal liquefaction; Free radical concentration; Proton donor quality index; Active hydrogen

摘要：In this manuscript, the products distribution was studied in solvents with different proton donor quality index (PDQIs), and the reaction behavior of radicals was investigated using ESR. Besides, the correlation between products distribution and characteristics of radical's reaction was investigated. The results showed that increasing temperature and PDQI had a significant promoting effect on coal conversion. When the PDQI of solvent was 30, yields of oil-gas were always maintained at maximum value compared to other solvents, which was up to 42.70 wt% at 450 degrees C. The free radical's concentration (CR) of residue and asphaltene (AS) decreased gradually with increasing PDQI, and the difference of CR of residue at different temperatures also reduced. The g value of residue increased significantly as PDQI increased from 10 to 20, while g value of residue (2.0033-2.0037) decreased significantly at the PDQI of 30, which may be due to that heteroatom in residue combined with more active hydrogen. A high correlation existed between the amount of hydrogen supplied by THN (NH) and CR of residue with increasing temperature, and the correlation could be enhanced as PDQI increased. However, the CR in asphaltene was less correlated with NH. Besides, the CR of residue was significantly correlated with coal conversion and oil-gas yield.