文献类型：期刊文献

英文题名：Preparation of CaO-Al2O3 sorbent and CO2 capture performance at high temperature

作者：Zhang, Mingming[1];Peng, Yunxiang[1];Sun, Yuzhu[1];Li, Ping[1];Yu, Jianguo[1]

机构：[1]E China Univ Sci & Technol, Coll Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：111

起止页码：636

外文期刊名：FUEL

收录：;EI(收录号：20132516440545);WOS:【SCI-EXPANDED(收录号:WOS:000321037600076)】；

基金：The authors are grateful to Mr. Longsheng Zhou and Ms. Ting Zhang for their help in characterization of samples. The authors thank Prof. Alirio E. Rodrigues heartily for his helpful revision on this work. The Research Received Financial Support from the China 863 program (Grant No. 2008AA062302).

语种：英文

外文关键词：Carbon dioxide; Calcium looping; CO2 capture; CaO; Al2O3

摘要：CaO-Al2O3 sorbents were synthesized through the citrate preparation route using citric acid, aluminum nitrate and CaCO3 as raw materials. In the final calcination step, a four-step heating mode, which might favor the formation of porous structure, was adopted to activate sorbents instead of the traditional one step activation procedure. The synthetic CaO-Al2O3 sorbents were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and Micrometrics ASAP 2010 apparatus. The CO2 capture capacity and long-term stability of the synthetic CaO-Al2O3 sorbent were tested with a thermogravimetric analyzer (TGA) over 100 carbonation and calcination cycles. Furthermore, the formation mechanism of the inert support substance in the prepared CaO-Al2O3 sorbent was analyzed. It was found that the synthetic CaO-Al2O3 sorbent with 9% Al2O3 additive had a higher specific surface area (958 m(2)/g) and larger pore volume (0.85 cm(3)/g), and the CO2 capture capacity, reaction kinetics and long-term cycle stability were improved significantly when compared with the performance of untreated CaO. (C) 2013 Elsevier Ltd. All rights reserved.