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, X[1];Xing, Y[1];Yang, X[2]

机构：[1]Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;[2]Beijing Higher Inst Engn Res Ctr Energy Conservat, Beijing 100083, Peoples R China;[3]Beijing Dist Heating Grp, Technol R&D Ctr Beijing, Beijing 100028, Peoples R China;[4]Natl Chiao Tung Univ, Inst Environm Engn, Univ Rd, Hsinchu 30010, Taiwan;[5]Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China;[6]Univ Melbourne, Dept Chem Engn, Melbourne, Vic 3010, Australia

第一机构：Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China

通讯机构：[1]corresponding author), Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;[2]corresponding author), Beijing Higher Inst Engn Res Ctr Energy Conservat, Beijing 100083, Peoples R China.

年份：2018

卷号：353

起止页码：858-866

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000441527900084)】；

基金：The authors would like to express the gratitude to the National Key R&D Program of China (No. 2017YFC0210302), the National Postdoctoral Program for Innovative Talents (No. BX201700029), the China Postdoctoral Science Foundation (No. 2018M630075), the Fundamental Research Funds for the Central Universities (No. FRF-TP-17-063A1, FRF-BD-18-015A), and the Beijing Natural Science Foundation (No. 8174064).

语种：英文

外文关键词：Adsorption; Sulfur dioxide; Activated carbons; Breakthrough curve modelling; Intraparticle diffusion

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.