文献类型：期刊文献

英文题名：The effect of temperature on soot formation during syngas production by the partial oxidation process

作者：Gao, Ming[1,2,3];Wang, Peiyao[1];Cheng, Liang[1];Yu, Fangchao[1];Ding, Lu[1,2];Zhao, Ling[2];Yang, Wenming[3];Wang, Fuchen[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Resource Utilizat Carbon containing W, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China;[3]Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore

年份：2025

卷号：526

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20254919665551);WOS:【SCI-EXPANDED(收录号:WOS:001636424200003)】；

基金：This work was financed by the National Natural Science Foundation of China (22178114) , the National Key Research and Development Program of China (2024YFB4006700) , and the China Postdoctoral Sci-ence Foundation (2025M771128, 2025T013ZGMK) .

语种：英文

外文关键词：POX; Soot formation; Precursor; Temperature; Growth mechanism

摘要：Partial oxidation (POX) is currently the most economically favorable technology for large-scale hydrogen production. To eliminate soot during the POX of methane-rich feedstocks, this study investigates the effect of temperature on the soot formation process. The findings challenge conventional engineering understandings of high-temperature soot suppression. By regulating the heat supply-dissipation balance, the system temperature was increased from 1000 degrees C to 1300 degrees C while maintaining constant inlet conditions. Soot precursor yield decreased from 3.21 % to 1.25 %, whereas soot yield increased from 0.02 % to 1.71 %. The increase in temperature promotes the conversion of soot precursors into soot particles. Polycyclic aromatic hydrocarbons tend to become heavier through various small molecule addition reactions. The dominant growth pathways are through hydrogen-abstraction-acetylene-addition (HACA) and hydrogen-abstraction-vinylacetylene-addition (HAVA) mechanisms, which remain highly sensitive and kinetically active at elevated temperatures. The increase in temperature also reduces the particle size of soot, and it also leads to a higher graphitization degree and fewer defects of soot. Soot finally performs a lower oxidative reactivity from high temperatures. This study provides theoretical support for the long-term, safe, and stable operation of industrial units.