文献类型：期刊文献

英文题名：Combustion characteristics and reactions of stacked wet pulverized magnesium

作者：Xiao, Qiuping[1,2];Zhang, Zhiwei[3];Shen, Xiaobo[3,4];Cai, Chenren[2];Ma, Pan[2];Li, Yuehua[2];Chen, Wanghua[1]

机构：[1]Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Peoples R China;[2]Shanghai Res Inst Chem Ind, 2666 West Guangfu Rd, Shanghai 200062, Peoples R China;[3]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2023

卷号：268

外文期刊名：ENERGY

收录：;EI(收录号：20230413441308);WOS:【SCI-EXPANDED(收录号:WOS:000924793800001)】；

基金：Acknowledgements This work was supported by the Shanghai Science and Technology Committee (Grant No. 20DZ2250500 and 20DZ1200903) and the Na-tional Natural Science Foundation of China (Grant No. 22078095 and No. 22278135) . The authors sincerely thank these supports.

语种：英文

外文关键词：Magnesium; Flame spread; Moisture content; Particle size; Reactions

摘要：Experiments were conducted to investigate the combustion of stacked wet pulverized magnesium. The flame spread over the stack was imaged by infrared camera. The flame shape, flame height, flame spread speed and combustion duration were extracted from infrared images and analyzed. It turned out that the flame spread behavior was closely related to the particle size and moisture content. The smallest particle size at 27 mu m had the most violent combustion compared to 61 mu m and 90 mu m at the same moisture content. With constant particle size, the flame intensity was reinforced as increasing the moisture content reaching the maximum between 20% and 25%. The flame spread would be attenuated instead with higher moisture content. It was believed to be resulted from the competition of chemical (positive) and thermal (negative) effect of water on magnesium combustion. The combustion process and reactions were scrutinized through direct observation and characterization of collected products. The product would either remain original prism-like strip shape or break down to scattered powders. During flame spread, the magnesium would react with oxygen, nitrogen, carbon dioxide and water in air yielding products with disparate colors. Finally, the combustion mechanism was deeply interpreted based on product morphology and reaction analysis.