文献类型：期刊文献

英文题名：Numerical study on the inter-pellet effects of centimeter-level biochar pellets in a hot O2/CO2 atmosphere

作者：Zhang, Chang[1,2];Tang, Longfei[1,2];Hu, Zichao[1,2];Ma, Yi[1,2];Pan, Weitong[1,2];Chen, Xueli[1,2];Ding, Lu[1,2];Wang, Fuchen[1,2]

机构：[1]Minist Educ, Engn Res Ctr Resource Utilizat Carbon containing W, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Shanghai 200237, Peoples R China

年份：2025

卷号：315

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20252118480408);WOS:【SCI-EXPANDED(收录号:WOS:001500332200001)】；

基金：This work was supported by the projects of the National Key Research and Development Program of China (2023YFD2201602) .

语种：英文

外文关键词：Biochar; Gasification; Inter-pellet effects; CO2/O2 atmosphere; CFD simulation

摘要：Biomass gasification in the fixed bed reactor is a highly multiscale process, where a clear mechanism of the inter-pellet effects is of great importance. In this study, three typical pellet configurations were proposed to investigate the synergistic effects of geometry and inflow factors on a double-pellet system. A steady-state shrinking core model was also established to describe the morphological evolution of cylindrical pellets. Results showed that the inter-pellet effects were mainly ascribed to the inhomogeneous heat and mass distributions, which would be further enhanced with a higher L/D ratio, a lower interval spacing and a stronger reaction intensity. The local consumption rates of pellets with different configurations were severely inhibited, from only 6.02 % to 27.28 % of the original values. Besides, the inter-pellet effects were suppressed with the shrinking process, which in reverse led to a more uniform morphological evolution, providing a theoretical basis for the actual industrial process.