文献类型：会议论文

英文题名：Study on the hydrothermal treatment of Shenhua coal

作者：Wang, Zhicai[1];Shui, Hengfu[1,3];Pei, Zhanning[1];Gao, Jinsheng[2]

机构：[1]Anhui Univ Technol, Key Lab Anhui Educ Dept, Sch Chem & Chem Engn, Maanshan 243002, Peoples R China;[2]E China Univ Sci & Technol, Coll Resource & Environm Engn, Shanghai 200273, Peoples R China;[3]Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China

会议论文集：9th China-Japan Symposium on Coal and C (1) Chemistry

会议日期：OCT 22-28, 2006

会议地点：Chengdu, PEOPLES R CHINA

语种：英文

外文关键词：hydrothermal treatment; Shenhua coal; swelling; extraction; hydro-liquefaction

摘要：In this paper, the hydrothermal treatment of Shenhua coal was carried out under 0.1 MPa (initial pressure) nitrogen and different temperature. Effects of hydrothermal treatment on the structure and the hydro-liquefaction activity of Shenhua coal were investigated by the ultimate and proximate analyses, the FTIR measurements and TG analyses of hydrothermally treated coals, and the characterizations of extraction and swelling properties, and the batch hydro-liquefaction of treated coal were also carried out. The results indicate that hydrothermal treatment above 200 degrees C can increase the hydrogen content of treated coal and decrease the yield of volatiles and the content of ash, especially a large amount of CO and CH4 are found in gas products obtained by the hydrothermal treatment above 250 degrees C. Hydrothermal treatment disrupts the weak covalent bond such as ether, ester and side-chain substituent by hydrolysis and pyrolysis, and changes the distribution of H-bond in coal. The swelling ratio and the Soxhlet extraction yield of treated coal decrease with the increase of hydrothermal treatment temperature. The conversion of liquefaction and the yield Of CS2/NMP mixed solvent extraction at ambient temperature are enhanced by hydrothermal treatment at 300 degrees C. Therefore hydrogen donation reactions and the rupture of non-covalent bond and weak covalent bonds present in the process of hydrothermal treatment resulting in the changes of structure and reactivity of Shenhua coal. The results show that the hydro-liquefaction activity of Shenhua coal can be improved by hydrothermal pretreatment between 250 degrees C and 300 degrees C. (c) 2007 Elsevier Ltd. All rights reserved.