文献类型：期刊文献

英文题名：Characteristics of Different Sized Slag Particles from Entrained-Flow Coal Gasification

作者：Pan, Chanchan[1];Liang, Qinfeng[1];Guo, Xiaolei[1];Dai, Zhenghua[1];Liu, Haifeng[1];Gong, Xin[1]

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

年份：2016

卷号：30

期号：2

起止页码：1487

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20160902007704);WOS:【SCI-EXPANDED(收录号:WOS:000370679000079)】；

基金：This work was supported by the National High Technology Research and Development Program of China (2013AA051103), the National Natural Science Foundation of China (U1402272), the National Natural Science Foundation of China (21376082), Fundamental Research Funds for the Central Universities (WB1314046), and Shanghai Natural Science Foundation (15ZR1409500).

语种：英文

外文关键词：Byproducts - Crystal structure - Particle size - Fluorescence spectroscopy - Spectrometry - Carbon - Scanning electron microscopy - Pore size - Pore structure - X ray diffraction analysis - Particle size analysis

摘要：Gasification slags are byproducts of the coal gasification process, including fine slags (slags from filter) and coarse slags (slags from lock hopper). The characteristics of gasification slags with different particle sizes were investigated by the loss on-ignition (LOI) method, scanning electron microscopy (SEM) with energy dispersive spectrometry (EDS), pore structure analysis, X-ray diffractometry (XRD), and X-ray fluorescence spectrometry (XRF). The relationships between the particle size and the characteristics of slags, which include residual carbon content, surface characteristics, pore structure, crystal mineral content, and ash composition, were analyzed and obtained. For fine slags, carbon content, specific surface area, porosity, and crystal content increase with particle size. For coarse slags, medium sized (105-280 mu m) particles contain the most residual carbons and crystal minerals, followed by the smaller (0-105 mu m) particles. Si/Al/Ca/Mg/K tends to concentrate in larger coarse slags, while Fe/S/P tends to concentrate in smaller particles. Different characteristics of different sized slags are mainly due to their different processes experienced in the gasifier. It is considered that particle fragmentation, ash agglomeration, and slag deposition should be taken into account.