文献类型：期刊文献

英文题名：Preparation of high concentration coal water slurry of lignite based on surface modification using the second fluid and the second particle

作者：Chen, Xing[1,2];Wang, Chunyu[1,2];Wang, Ziyu[1,2];Zhao, Hui[1,2];Liu, Haifeng[1]

机构：[1]East China Univ Sci & Technol, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, POB 272,130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Shanghai 200237, Peoples R China

年份：2019

卷号：242

起止页码：788

外文期刊名：FUEL

收录：;EI(收录号：20190406422670);WOS:【SCI-EXPANDED(收录号:WOS:000459430100079)】；

基金：This research was supported by the National Natural Science Foundation of China (21878095), the Shanghai Engineering Research Center of Coal Gasification (18DZ2283900), the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Lignite; Surface modification; The second fluid; The second particle

摘要：Lignite is difficult to be used in the preparation of high concentration coal water slurry. To improve its slurryability, two methods based on surface modification were investigated. In method I, the second fluid which is immiscible with the continuous phase of the suspension was added to the dried lignite particles to form a thin hydrophobic membrane. And in method II, the second particle which has a good hydrophobicity was dispersed in the second fluid and added to the lignite. Apparent viscosity of CWS of lignite decreased obviously by method I, and it had a further decreased by method II. And the results of contact angle showed that there was an obvious increase in hydrophobicity of lignite particles, which were corresponding to the decrease of apparent viscosity of CWS of lignite. Microscopically, the structure image obtained by the confocal laser scanning microscope showed the existence form of the second fluid in CWS of lignite, which revealed the causes of the decrease of apparent viscosity on the particle scale. In this study, the maximum slurry concentration (MSC) of lignite prepared by method II increased from 53.4 wt% to 56.3 wt%, and the slurry had a good fluidity.