中文摘要：

引言 全球变暖已经成为一个备受关注的环境问题。据预测，如不采取积极的温室气体减排措施，从现在起到2100年，全球近地面平均气温将继续升高1．4-5．8℃^[1]。CO2是主要的温室气体，而我国燃煤电厂是CO2排放量最大、最集中的化石燃料燃烧场所。因此研究和开发适用于燃煤电厂的CO2减排技术至关重要。

英文摘要：

The carbonation characteristics of K2CO3/Al2O3 supported sorbent for CO2 capture was investigated with thermogravimetric apparatus （TGA）, X-ray diffraction （XRD）, scanning electron microscopy analysis （SEM） and N2 adsorption. The results showed that the carbonation rate of K2CO3 before being loaded on Al2O3 was slow. However, the K2CO3/Al2O3 supported sorbent showed excellent carbonation performance. The difference in carbonation behavior between K2CO3 and K2CO3/Al2O3 supported sorbent was analyzed from the microscopic view. The analytical reagent K2CO3 sample was of monoclinic crystal structure and could react quickly with H2O in the experimental carbonation environment to produce K2 CO3·1.5H2O, which was unfavorable to carbonation reaction. When K2 CO3 was loaded on ALO3, the surface area and porosity of the sorbent was improved greatly. So the carbonation properties of the K2CO3/Al2O2 supported sorbent was also improved.