Preparation of ternary composite Ca-based material CaO-Ca3Al2O6-MgO for high-temperature CO2 capture

被引：0
|
作者：
机构：
[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology
来源：
Li, P. (liping_2007@ecust.edu.cn) | 1600年 / Materials China卷 / 65期
关键词：
Alumina; Calcium oxide; Carbon dioxide; Deactivation; Magnesium oxide; Sorbents;
D O I：
10.3969/j.issn.0438-1157.2014.01.029
中图分类号：
O61 [无机化学]; TQ [化学工业];
学科分类号：
070301 ; 0817 ; 081704 ;
摘要：
Synthetic sintering-resistant calcium based material for high-temperature CO2 capture was prepared by doping Al2O3 and MgO into CaO using wet chemical method. The synthetic materials with pore structure developed consist of three substances, CaO, Ca3Al2O6 and MgO. Lower mass ratio of Ca3Al2O6/MgO gives smaller grain size of the synthetic material. CO2 capture capacities and cyclic carbonation/calcination (670/900°C) stability were evaluated in thermogravimetric analyzer under the simulated 10%(vol., the same below) CO2 (90% N2). It is found that the synthetic CaO-Ca3Al2O6-MgO material presents good performance to capture CO2 from the flue gas, and the mass ratio of Ca3Al2O6/MgO has significant effect on CO2 capture performance. Lower mass ratio leads to faster carbonation reaction rate and higher CaO conversion. Moreover, the deactivation mechanism of synthetic material and the anti-sintering mechanism of doping agents were studied through analysis of specific surface area, pore volume, micro morphology, element distribution, phase composition and grain size of CaO-Ca3Al2O6-MgO material after multicycle carbonation/calcination. © All Rights Reserved.
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页码：227 / 236
页数：9
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