NOVEL CO_2 ABSORBENTS USING LITHIUM-CONTAINING OXIDES

摘要

Lithium-containing oxides have been developed for application as a series of novel CO_2 absorbents. The absorption is ascribed to the mechanism whereby lithium oxide in the crystal structure reacts reversibly with CO_2. Among these absorbents, lithium orthosilicate (Li_4SiO_4) reacts with CO_2 at higher reaction rate at around 500°C. Furthermore, the emission was performed at a much lower temperature than that of CaO. This temperature enables Li_4SiO_4 to be used repeatedly in pure CO_2. Moreover, the absorption also proceeds at ambient temperature in an atmospheric environment. This characteristic suggests numerous possible applications such as air cleaners or cartridges. In this study, CO_2 absorption properties of lithium orthosilicate and its contemplated applications were investigated.