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CO_2资源化利用对实现节能减排意义重大,在利用HSC5.1热力学数据库对Li_4SiO_4吸附CO_2的热力学进行分析的基础上,采用自行研制的热天平分析研究Li_4SiO_4吸收CO_2的性能,用X射线衍射仪和扫描电子显微镜(SEM)分别观察和评价在不同温度下Li_4SiO_4吸收CO_2后的物相组成与Li_4SiO_4吸收CO_2前后表面微观形貌的变化特征.分析与实验结果发现,材料在600～720 ℃段吸收CO_2反应最为活跃,最高吸收量可达29.16%(wt)左右;材料吸收CO_2后在750 ℃开始脱出CO_2,再生为Li_4SiO_4;CO_2的体积百分含量对Li_4SiO_4吸收CO_2的速度和吸收量有明显影响;气氛相同时,气体流量对吸收速度和吸收量的影响不明显.“,”The CO_2 resource-oriented utilization is of major significance for realizing energy savings and harmful gas emissions reduction.On the basis of a thermodynamic analysis of Li_4SiO_4 adsorbing CO_2 conducted by using HSC 5.1 thermodynamics database,the authors have analyzed and studied the performance of Li_4SiO_4 adsorbing CO_2 by employing a self-developed thermal scale.They have also observed and evaluated respectively the material-phase composition after absorption of CO_2 by Li_4SiO_4 at various temperatures and the microscopic surface morphological change characteristics before and after the absorption.It has been found from an analysis and test results that the material is most active in reactions for absorbing carbon dioxide at a temperature ranging from 600 ℃ to 720 ℃ and the maximal absorption quantity can reach about 29.16% (by weight).After absorption of CO_2,the material begins to release CO_2 at 750 ℃ and then is regenerated to Li_4SiO_4.The volume percentage content of CO_2 has a notable influence on the absorption velocity and quantity of carbon dioxide by Li_4SiO_4.In an identical atmosphere,the gas flow rate has no conspicuous effect on the absorption velocity and quantity.