文献类型：期刊文献

英文题名：In situ study on the formation mechanism of bubbles during the reaction of captured chars on molten slag surface

作者：Shen, Zhongjie;Liang, Qinfeng;Xu, Jianliang;Liu, Haifeng[1]

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

年份：2016

卷号：95

起止页码：517

外文期刊名：INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER

收录：;EI(收录号：20160101752419);WOS:【SCI-EXPANDED(收录号:WOS:000370111200047)】；

基金：This study was supported by the National High Technology Research and Development Program of China (2013AA051103), the National Natural Science Foundation of China (U1402272) and the National Natural Science Foundation of China (21376082).

语种：英文

外文关键词：Char; Slag; Gasification; Bubble; Formation mechanism

摘要：Bubbles in the liquid slag affect the rheology and thermal conductivity, and formed porous structures after cooling or quench in the industrial gasifier. In this study, we applied a high temperature stage microscope (HTSM) to investigate the formation mechanism of bubbles during char gasification on molten slag surface. The initial bubble diameter and the formation time were measured by ImageJ software. Bubbles formed on the char-slag interface and formation time of the initial bubble increased with increasing initial particle size. Bubble accumulative volume for a single char particle increased with the shrinkage of particle. Results also showed that gas product from fine particles tended to diffuse into liquid slag and form the bubbles, with the comparison of bubble accumulative volume and gas product volume from a single particle. In addition, particle diameter at the initial bubble formation time was proportional to the initial particle size. The formation mechanism of bubbles was analyzed and predicted, which showed approximate results for the experiment data and was available for the bubble formation. (C) 2015 Elsevier Ltd. All rights reserved.