摘要
Recycling and utilizing CO<sub>2</sub> is very important significance to realizing energy saving and emission reduction.Lithium silicate (Li<sub>4</sub>SiO<sub>4</sub>) absorbents for CO<sub>2</sub> were prepared by high-temperature solid-state reaction.Thermodynamic equilibrium of Li<sub>4</sub>SiO<sub>4</sub> absorption CO<sub>2</sub> was discussed using the HSC5.0 code.The capability of Li<sub>4</sub>SiO<sub>4</sub> for absorption CO<sub>2</sub> was investigated using the thermobalance instrument.The crystal structure and surface morphologies of the Li<sub>4</sub>SiO<sub>4</sub> were also analyzed by X-ray diffraction,SEM.The results showed:the absorption reaction is fast in the temperature range 600<sup>7</sup>20℃,the maximum absorption rate(w) was 29.16%;and the desorption reaction began in 750℃,then Li<sub>4</sub>SiO<sub>4</sub> is regenerated.The concentrations of CO<sub>2</sub> obviously affect on the absorption speed and the maximum absorption rate;but the flow rate of CO<sub>2</sub> little influences the absorption capability.
Recycling and utilizing CO_2 is very important significance to realizing energy saving and emission reduction.Lithium silicate (Li_4SiO_4) absorbents for CO_2 were prepared by high-temperature solid-state reaction.Thermodynamic equilibrium of Li_4SiO_4 absorption CO_2 was discussed using the HSC5.0 code.The capability of Li_4SiO_4 for absorption CO_2 was investigated using the thermobalance instrument.The crystal structure and surface morphologies of the Li_4SiO_4 were also analyzed by X-ray diffraction,SEM.The results showed:the absorption reaction is fast in the temperature range 600~720℃,the maximum absorption rate(w) was 29.16%;and the desorption reaction began in 750℃,then Li_4SiO_4 is regenerated.The concentrations of CO_2 obviously affect on the absorption speed and the maximum absorption rate;but the flow rate of CO_2 little influences the absorption capability.
出处
《中山大学学报(自然科学版)》
CAS
CSCD
北大核心
2009年第S2期79-81,共3页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
教育部新世纪优秀人才支持计划基金资助项目(NCET-07-0387)
云南省中青年学术技术带头人后备人才基金资助项目(2005PY01-33)