文献类型：期刊文献

英文题名：Adsorption and Desorption of Carbon Dioxide and Nitrogen on Zeolite 5A

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

机构：[1]Univ Porto, Dept Chem Engn, Associate Lab LSRE LCM, Lab Separat & React Engn LSRE,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：2011

卷号：46

期号：3

起止页码：434

外文期刊名：SEPARATION SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20111113744484);WOS:【SCI-EXPANDED(收录号:WOS:000288274200010)】；

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 the China Scholarship Council (CSC) for the stay of Z. L. at LSRE.

语种：英文

外文关键词：adsorption; carbon dioxide; desorption; nitrogen; zeolite 5A

摘要：The adsorption equilibrium data of CO2 and N2 at (303, 333, 363, 393, 423) K ranging 0-1bar on zeolite 5A is reported. The pressure and temperature range covers the operating pressure in adsorption units for CO2 capture from power plants. Experimental data were fitted by the multi-site Langmuir model. The adsorbent is much more selective to CO2: loading at 303K and 100kPa is 3.38mol/kg while loading of N2 at the same pressure is 0.22mol/kg. The Clausius-Clapeyron equation was employed to calculate the isosteric enthalpy of adsorption. The fixed-bed adsorption and desorption of carbon dioxide and nitrogen on zeolite 5A pellets has been studied. A model based on the bi-LDF approximation for the mass transfer, taking into account the energy and momentum balances, had been used to describe the adsorption kinetics of carbon dioxide and nitrogen. The model predicted satisfactorily the breakthrough curves obtained with carbon dioxide-nitrogen mixtures. Desorption process (consisting of depressurization, blowdown, and purge) was also performed. Following the feasibility of concentration and capture of carbon dioxide from flue gases by Pressure Swing Adsorption (PSA) process was simulated. A CO2 recovery of 91.0% with 53.9% purity was obtained using a five-step Skarstrom-type PSA cycle.