文献类型：期刊文献

英文题名：Sol-gel-Derived Synthetic CaO-Based CO2 Sorbents Incorporated with Different Inert Materials

作者：Zhao, Changjun[1];Zhou, Zhiming[1];Cheng, Zhenmin[1]

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

年份：2014

卷号：53

期号：36

起止页码：14065

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20144200097994);WOS:【SCI-EXPANDED(收录号:WOS:000341544300027)】；

基金：The authors acknowledge financial support from the National Natural Science Foundation of China (21276076), the Program for New Century Excellent Talents in University (NCET-13-0801), the Fundamental Research Funds for the Central Universities (222201313011), and the "111" project (B08021).

语种：英文

外文关键词：Magnesia - Sol-gels - Sorbents - Sorption - Zirconium compounds - Aluminum compounds - Carbon dioxide - Perovskite

摘要：A series of CaO-based sorbents incorporated with different inert materials (Ca2SiO4, Ca3Al2O6, CaTiO3, CaZrO3, and MgO) were prepared by a simple citrate solgel method. The structureproperty relationship of the sorbents was explored, and the cyclic CO2 capture capacity and stability of the sorbents were evaluated. It was found that the complexation time, dispersion agent, calcium precursor, and inert material had significant effects on the sorbent structure and performance. The best CaO-based sorbent stabilized by CaZrO3 (29.1 wt %) had a stable CO2 capture capacity of 0.45 g(CO2)/g(sorbent) over 30 consecutive cycles, which was mainly ascribed to the small grains, accessible pores, and homogeneous distribution of CaO and CaZrO3 in the sorbent. Under severe but more realistic conditions (10 min of carbonation in 15% CO2/N-2 at 650 degrees C, 5 min of calcination in 80% CO2/N-2 at 1000 degrees C), this sorbent exhibited a constant capacity of 0.16 g(CO2)/g(sorbent) (carbonation conversion of 29%) after 50 cycles.