High‐Temperature Capture of CO2 on Lithium‐Based Sorbents Prepared by a Water‐Based Sol‐Gel Technique |
| |
| Authors: | Ke Wang Xinyong Wang Pengfei Zhao Xin Guo |
| |
| Affiliation: | 1. School of Electric Power Engineering, China University of Mining and Technology, Xuzhou, China.;2. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, China. |
| |
| Abstract: | A convenient water‐based sol‐gel technique was used to prepare a highly efficient lithium orthosilicate‐based sorbent (Li4SiO4‐G) for CO2 capture at high temperature. The Li4SiO4‐G sorbent was systematically studied and compared with the Li4SiO4‐S sorbent prepared by solid‐state reaction. Both sorbents were characterized by X‐ray diffraction, scanning electron microscopy, nitrogen adsorption, and thermogravimetry. The CO2 sorption stability was investigated in a dual fixed‐bed reactor. Li4SiO4‐G exhibited a special Li4SiO4 structure with smaller crystalline nanoparticles, larger surface area, and higher CO2 adsorption properties as compared with Li4SiO4‐S. The Li4SiO4‐G sorbent also maintained higher capacities during multiple cycles. |
| |
| Keywords: | Desorption Lithium orthosilicate sorbent Sol‐gel technique Sorption |
|
|
