论文信息 - A new synthesis route to Li4SiO4 as CO2 catalytic/sorbent

A new synthesis route to Li4SiO4 as CO2 catalytic/sorbent

Abstract An alternate method for the synthesis of a carbon dioxide (CO 2 ) capture catalytic/sorbent, Li 4 SiO 4 , has been developed. This method consists in mixing two precursors in a solid suspension, one being incorporated in an aqueous solution (LiNO 3 ) and the other in a suspended phase (SiO 2 ). Thermodynamic analysis and characterization results (X-ray diffraction (XRD), scanning electronic microscopy (SEM) and thermo-gravimetric (TGA) reactor techniques suggest a significant effect on the particle size towards the formation of desired phase Li 4 SiO 4 . TGA-CO 2 sorption conversions reported in this work resulted in higher conversion (98%) and reaction rate than reported up to date (83%). Furthermore, lower synthesis temperatures (900 °C) are achieved through this alternate synthesis than the actual method of solid solution (1000 °C). Only slight sintering problems were encountered.

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