文献类型：期刊文献

英文题名：Study on the fluidity of ash slag of liquefaction solid product and lignite co-gasification

作者：Wang, Jiajian[1];Liu, Xia[1];Guo, Qinghua[1];Cao, Xi[1];Wu, Hao[1];Yu, Guangsuo[1,2]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[2]Ningxia Univ, State Key Lab High Efficiency Utilizat Coal & Gre, Yinchuan 750021, Ningxia, Peoples R China

年份：2022

卷号：17

期号：1

外文期刊名：ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20214311061167);WOS:【SCI-EXPANDED(收录号:WOS:000710123000001)】；

基金：This work was supported by National Key R&D Program of China (2017YFB0602601 and 2017YFB0602404) and National Natural Science Foundation of China (21878093).

语种：英文

外文关键词：co-gasification; crystallization behavior; fusibility; liquefaction solid product; viscosity

摘要：The utilization of liquefaction solid product (LSP) obtained from fluidization reaction pyrolysis has become a pressing obstacle limiting the industrialization of coal liquefaction technology. In this work, gasification of LSP and Hami lignite coal (LC) and their blend at different ratios was investigated. In addition, the melt flow, mineral transformation, and crystallization behavior in the fusion process and cooling process were investigated. The results show that both LSP and LC are typical crystalline slags and cannot be applied to entrained flow gasification alone. The co-gasification of LC and LSP is a feasible method to improve their fluidity. At the ratio of 2:1 (LC to LSP), the blend has the lowest AFT. For molten slag, viscosity of the sample corresponded well to the structure of the slag. LC1:2LSP with higher Q(2) and Q(3) content showed a high viscosity, while LC1:2LSP with higher Q(0) and Q(1) content showed a lower viscosity. Besides, the size of the crystals generated during cooling is inversely proportional to the high-temperature viscosity of the sample, the migration of ions became difficult, and the growth of crystal size was inhibited at high viscosity. Meanwhile, the slag type of samples was influenced by the precipitated crystals. T-cv can be effectively reduced by blending LC with LSP in a certain proportion. The results provide a theoretical basis for the utilization of LSP for the operation of entrained flow gasification.