文献类型：期刊文献

英文题名：Adsorption equilibria and kinetics of CO₂ and N₂ on activated carbon beads

作者：Shen, Chunzhi[1,2];Grande, Carlos A.[1];Li, Ping[2];Yu, Jianguo[2];Rodrigues, Alirio E.[1]

机构：[1]Univ Porto, LSRE, Associate Lab LSRE LCM, Dept Chem Engn,Fac Engn, P-4200465 Oporto, Portugal;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Coll Chem Engn, Shanghai 200237, Peoples R China

年份：2010

卷号：160

期号：2

起止页码：398

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000279137900002)】；

基金：The authors are grateful for the financial support of China 863 program (Grant No. 2008AA062302), Shanghai International Cooperation Project (Grant No. 08160704000), Shanghai Pujiang Talent program (Grant No. 08PJ14034) and the fellowship from China Scholarship Council (CSC) for the stay of C.S. at LSRE. The authors also acknowledge Professor Ling Licheng to provide the activated carbon beads.

语种：英文

外文关键词：Adsorption; Carbon dioxide; Pitch-based activated carbon; Virial model; Multisite Langmuir; Breakthrough curve

摘要：Knowledge of adsorption equilibria and kinetics of pure gases is required for designing an adsorption process for a new material that can be scaled-up to large amounts. In this work, adsorption equilibrium data of CO2 and N-2 on pitch-based activated carbon (AC) beads at 303, 333, 363, 393, and 423 K ranging from 0 to 100 kPa and at 303,333 K ranging from 0 to 4000 kPa were presented. The adsorption capacity is 1.918 mol/kg for CO2 and 0.270 mol/kg for N-2 at 303 K and 100 kPa. The full set of data was fitted with both Virial adsorption equation and multisite Langmuir model. The diffusion of single gases in the microporous structure of AC beads was studied by diluted breakthrough experiments performed over the same temperature range of 303-423 K. A mathematical model was employed in the simulation of breakthrough curves. It was determined that for CO2 and N-2, the controlling mechanism is micropore diffusion. The micropore diffusivity constant (D-c/r(c)(2)) for carbon dioxide and nitrogen obtained at 303 K is 1.058 x 10(-2) and 7.185 x 10(-2) s(-1), respectively. The data reported in this work allows modeling of any adsorption processes with this new material. (C) 2010 Published by Elsevier B.V.