A facile Solvent/Nonsolvent Preparation of Sintering-Resistant MgO/CaO Composites for High-Temperature CO2 Capture
A facile Solvent/Nonsolvent Preparation of Sintering-Resistant MgO/CaO Composites for High-Temperature CO2 Capture
复制标题
用于高温 CO2 捕获的耐烧结 CaO/MgO 复合材料的简便溶剂/非溶剂制备
DOI：
10.1002/ente.201800300
复制
发表时间：
2018-12-01
影响因子：
3.8
通讯作者：
Wang, Qiang
中科院分区：
文献类型：
--
作者：
Huang, Liang;Zheng, Qianwen;Wang, Qiang
For CaO-based high-temperature CO2 sorbents, excellent cyclic stability is highly desired for its practical applications. Among all techniques, preparation of CaO-based composites is one of the most widely accepted strategies, and the mixing status between CaO and the inert supporting material is crucial for its anti-sintering property. This work provides a new strategy for preparing nanometrically dispersed MgO/CaO composites with significantly improved cyclic stability. The so called solvent/nonsolvent synthesis method can endow a simultaneous solidification of Ca and Mg and result in a nano-meter level mixing of CaO and MgO. The optimized sorbent Mg/Ca-0.2 retained 95.3 % (13.45 mmol g(-1)) of its initial capacity after 7 cycles, while the control CaAc2-CaO only retained 52.9 % (8.67 mmol g(-1)) of its initial capacity. The addition of MgO also increase the CO2 sorption and desorption kinetics after several cycles. We believe that this new and facile solvent/nonsolvent synthesis method is also promising for the preparation of other highly mixed metal oxides.
