文献类型：期刊文献

英文题名：Experimental studies on the explosion characteristics of coal/syngas/ air mixtures

作者：Dou, Zengguo[1,2];Shen, Xiaobo[1,3];Zhou, Mingchuan[4];Wang, Zhengang[4];Du, Miaosen[1];Liu, Haifeng[1,2];Wang, Fuchen[1,2]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[4]SINOPEC Res Inst Safety Engn Co Ltd, State Key Lab Safety & Control Chem, Qingdao 266071, Peoples R China

年份：2024

卷号：368

外文期刊名：FUEL

收录：;EI(收录号：20241515906186);WOS:【SCI-EXPANDED(收录号:WOS:001226734100001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 22078095 and 22278135) and the Shanghai Science and Technology Committee (Grant No. 21QC1400400) . The authors

语种：英文

外文关键词：Explosion limit; Transportation; Gasification; Combustion mechanism

摘要：To study the explosion characteristics of pulverized coal with syngas/air conditions, micron particle dust explosion experiments are carried out in a 20L spherical explosion vessel. This experiment verifies the safety of syngas carrying pulverized coal transportation when the solid-gas ratio is 300 kg/m3, and the pressure sensor captures the overpressure dynamics. The results show that the explosion intensity increases first and then decreases with the increase of coal dust concentrations, and the maximum value of 0.81 MPa occurs at the concentration of 325 g/m3. The lower explosion limit (LEL) of coal/syngas/air mixtures is 50 g/m3, while the upper explosion limit (UEL) is 4000 g/m3. The experiments are carried out with varied coal dust concentrations. Scanning electronic microscopy, proximate and FTIR analysis of raw coal and explosive products show that the syngas/air atmosphere can reduce the Lower Explosive Limit of pulverized coal. The volatile matter is the main component involved in the reaction during the explosion of pulverized coal, while the absorption peaks of -OH and aliphatic -CH3 and -CH2 in the explosion products are significantly weakened compared with the raw coal.