A convenient water-based sol-gel technique was used to prepare a highly efficient lithium orthosilicate-based sorbent (Li 4 SiO 4 -G) for CO 2 capture at high temperature. The Li 4 SiO 4 -G sorbent was systematically studied and compared with the Li 4 SiO 4 -S sorbent prepared by solid-state reaction. Both sorbents were characterized by X-ray diffraction, scanning electron microscopy, nitrogen adsorption, and thermogravimetry. The CO 2 sorption stability was investigated in a dual fixed-bed reactor. Li 4 SiO 4 -G exhibited a special Li 4 SiO 4 structure with smaller crystalline nanoparticles, larger surface area, and higher CO 2 adsorption properties as compared with Li 4 SiO 4 -S. The Li 4 SiO 4 -G sorbent also maintained higher capacities during multiple cycles.

No abstract

No abstract

No abstract

No abstract