【摘要】 <正>Recycling and utilizing CO₂ is very important significance to realizing energy saving and emission reduction.Lithium silicate （Li₄SiO₄） absorbents for CO₂ were prepared by high-temperature solid-state reaction.Thermodynamic equilibrium of Li₄SiO₄ absorption CO₂ was discussed using the HSC5.0 code.The capability of Li₄SiO₄ for absorption CO₂ was investigated using the thermobalance instrument.The crystal structure and surface morphologies of the Li₄SiO₄ were also analyzed by X-ray diffraction,SEM.The results showed:the absorption reaction is fast in the temperature range 600⁷20℃,the maximum absorption rate（w） was 29.16%;and the desorption reaction began in 750℃,then Li₄SiO₄ is regenerated.The concentrations of CO₂ obviously affect on the absorption speed and the maximum absorption rate;but the flow rate of CO₂ little influences the absorption capability.更多还原

【Abstract】 Recycling and utilizing CO₂ is very important significance to realizing energy saving and emission reduction.Lithium silicate （Li₄SiO₄） absorbents for CO₂ were prepared by high-temperature solid-state reaction.Thermodynamic equilibrium of Li₄SiO₄ absorption CO₂ was discussed using the HSC5.0 code.The capability of Li₄SiO₄ for absorption CO₂ was investigated using the thermobalance instrument.The crystal structure and surface morphologies of the Li₄SiO₄ were also analyzed by X-ray diffraction,SEM.The results showed:the absorption reaction is fast in the temperature range 600⁷20℃,the maximum absorption rate（w） was 29.16%;and the desorption reaction began in 750℃,then Li₄SiO₄ is regenerated.The concentrations of CO₂ obviously affect on the absorption speed and the maximum absorption rate;but the flow rate of CO₂ little influences the absorption capability.更多还原