文献类型：期刊文献

英文题名：The influence of pre-absorbing water in coal on the viscosity of coal water slurry

作者：Zhang, Jie;Zhao, Hui;Wang, Chunyu;Li, Weifeng;Xu, Jianliang;Liu, Haifeng[1]

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

年份：2016

卷号：177

起止页码：19

外文期刊名：FUEL

收录：;EI(收录号：20161202128210);WOS:【SCI-EXPANDED(收录号:WOS:000373061800004)】；

基金：This study was supported by the National Natural Science Foundation of China (U1402272), Fundamental Research Funds for the Central Universities (WB1514074, WB1514076), and Shanghai Natural Science Foundation (15ZR1409500).

语种：英文

外文关键词：Coal water slurry; Porous material; Pre-absorbing water; Rheological characterization; Second fluid

摘要：Coal water slurry (CWS) with high solid content and low viscosity can allow for efficient and environmentally friendly gasification. In the process of CWS preparation, water will enter pores of coal particle to form inner water, resulting in a decrease in free water among particles and an increase in viscosity. However, pre-absorption of moisture from air was found to result in a sharp decrease of suspension viscosity, since small amount of air were sealed in particle pores. Coal particles have many polar functional groups, and pre-absorbed water sealed the entrance of pores through hydrogen bonds like a "bottle stopper", which effectively inhibited the diffusion of water from slurry into the pores of coal particles. Pre-absorption of water from air was also found to improve the efficiency of the second fluid (immiscible with water), and cause a further decrease in viscosity and yield stress. (C) 2016 Elsevier Ltd. All rights reserved.