文献类型：期刊文献

英文题名：A numerical modelling study of SO2 adsorption on activated carbons with new rate equations

作者：Li, Ziyi[1,2]; Liu, Yingshu[1,2]; Wang, Haihong[3]; Tsai, Chuen-Jinn[4]; Yang, Xiong[1,2]; Xing, Yi[1]; Zhang, Chuanzhao[5]; Xiao, Penny[6]; Webley, Paul A.[6]

第一作者：Li, Ziyi

通讯作者：Yang, Xiong

机构：[1] School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China; [2] Beijing Higher Institution Engineering Research Center of Energy Conservation and Environmental Protection, Beijing, 100083, China; [3] Technology R&D Center Beijing, Beijing District Heating Group, Beijing District Heating Group, Beijing, 100028, China; [4] Institute of Environmental Engineering, National Chiao Tung University, University Road, Hsinchu, 30010, Taiwan; [5] College of Biochemical Engineering, Beijing Union University, Beijing, 100023, China; [6] Department of Chemical Engineering, The University of Melbourne, Victoria, 3010, Australia

第一机构：School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China

通讯机构：[1]School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China

年份：2018

卷号：353

起止页码：858-866

外文期刊名：Chemical Engineering Journal

收录：EI(收录号：20183205653429);Scopus(收录号：2-s2.0-85050865901)

语种：英文

外文关键词：Gas adsorption - Particle size - Diffusion - Activated carbon - Physisorption

摘要：Modelling dynamic adsorption of sulfur dioxide (SO2) on activated carbons (ACs) is significant in guiding practical desulphurization processes and making highly efficient use of adsorbents in terms of the adsorption rate which largely depends on particle size. In this work, models derived from the Vermeulen and an improved linear driving force (LDF) rate equation were studied for the first time on SO2 adsorption over AC particles with different sizes. For larger particles (≥3 mm), breakthrough curves predicted by the Vermeulen equation showed good agreement with experimental data, demonstrating that intraparticle diffusion resistance varied with particle size, feed concentration, adsorption time and location. For smaller particles (1 mm), a correction on the volume-averaged adsorption capacity as a function of adsorption time and saturation in the rate equation was developed to avoid the underestimation of adsorption rate due to the inappropriate parabolic concentration profile inherent in the conventional LDF model. By providing a concentration gradient and adsorption rate closer to actual values, the improved LDF equation was confirmed to provide excellent prediction results on 1-mm particles. Different modelling characteristics of the two models indicates varying effects of intraparticle diffusion on adsorption rate with particle size regarding the specificity of SO2 physisorption on ACs. ? 2018 Elsevier B.V.