文献类型：期刊文献

英文题名：Experimental and modeling on co-gasification of biomass and coal with multiple mixing modes on liquid slag surface

作者：Zhou, Wenting[1,2];Dong, Zizheng[1,2];Zhang, Haigang[3];Shen, Zhongjie[1,2];Liu, Haifeng[3]

机构：[1]East China Univ Sci & Technol, Natl Energy Coal Gasificat Technol Res & Dev Ctr, POB 272, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China;[3]Liaoning Petrochem Univ, Fushun 113001, Liaoning, Peoples R China

年份：2026

卷号：528

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20260119845717);WOS:【SCI-EXPANDED(收录号:WOS:001658302600001)】；

基金：This study is supported by the National Natural Science Foundation of China (22378130) , the Key R & D Program of Xinjiang Uygur Auton-omous Region (2022B03026-1) .

语种：英文

外文关键词：Coal; Biomass; Co-gasification; Mixing mode; Liquid surface; Reaction kinetics

摘要：The mixing mode of multiple feedstocks in a reactor is critical for the conversion and kinetic study of heterogeneous reactions. The current work investigated the influence of different mixing modes of biomass (wood powder) and torrefied wood powder with coal on the liquid surface on the co-gasification reaction. A reaction model considering the mixing mode was proposed to predict the conversion and multiphase mass transfer. Experimental results indicated that the mixed mode significantly enhanced the co-gasification rate, delayed the release of the gas product H2 in the early reaction stage, and further caused different graphitization degree of the residual carbon. The mix mode advanced the peak time of concentrated H2 release by approximately 50 % relative to the C-B-S mode. The ID1/IG value of the Mix sample is approximately 49 % higher than that of the layered sample B-C-S (ID1/IG = 1.875), indicating a higher degree of structural disorder. Both experimental and modeling results demonstrated that the mixed mode significantly improved mass-transfer efficiency. Among the co-gasification samples under different bed structures, Mix and MixT exhibited the highest DA0 values, reaching 0.287 cm2/s and 0.338 cm2/s, respectively. The effective diffusion coefficient (DA0) of the Mix sample was about 71 % higher than that of the layered sample B-C-S (DA0 = 0.168 cm2/s). The DA0 of the MixT sample was approximately 18 % higher than that of the non-torrefied sample. Model predictions agreed well with experimental data, with an average relative error within +/- 6.5 %. The fluctuations in DA were attributed to the combined effects of organic matter consumption and ash-layer resistance.