文献类型：期刊文献

英文题名：Influence of Small Oxygen-Containing Organic Molecules on the Rheology of the Coal Water Slurry

作者：Zhang, Jie[1,2];Zhao, Hui[1,2];Wang, Chunyu[1,2];Li, Weifeng[1,2];Xu, Jianliang[1,2];Liu, Haifeng[1,2]

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

年份：2016

卷号：30

期号：7

起止页码：5506

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20163102660957);WOS:【SCI-EXPANDED(收录号:WOS:000380523200034)】；

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

语种：英文

外文关键词：Coal - Elasticity - Hydrophobicity - Hydrophilicity - Water pollution - Industrial water treatment - Slurries - Surface chemistry - Oxygen - Yield stress - Wastewater treatment - Fourier transform infrared spectroscopy

摘要：To alleviate the increasingly serious water pollution, industrial wastewater is expected to be treated by coal gasification. In this paper, the usability of wastewater in the coal water slurry (CWS) was evaluated. The influences of common components in industrial wastewater, small oxygen-containing organic molecules, on the rheology of the CWS were researched. The viscosity and yield stress of the CWS were found to increase with the presence of small organic molecules. The microstructures and mechanisms of slurries were characterized using confocal laser scanning microscopy (CLSM), Fourier transform infrared spectroscopy (FTIR), and contact angle measurement. In the CWS, the hydrophobic surface of the coal particle was found to absorb small oxygen-containing organic molecules and turn hydrophilic. It resulted in thicker hydration layers and less amount of free water. In addition, dispersants were difficult to absorb at the hydrophilic surface, weakening the steric and electrostatic repulsions between particles. Thereby, industrial wastewater (containing small oxygen-containing organic molecules) has negative impacts on the CWS preparation. Further steps are expected to be researched to weaken and eliminate these negative impacts, to improve the treatment technology of industrial wastewater.