中文摘要：

对钾基吸收剂在含有微量SO2气氛下的碳酸化反应特性进行研究。利用热重分析仪（thermogravimetric apparatus,TGA）、X射线衍射仪（X-ray diffraction,XRD）以及硫酸钡重量法分析了烟气中的SO2对KHCO3分解生成的K2CO3吸收CO2的影响,导出了反应方程式。在含有微量SO2的模拟烟气中,K2CO3反应的产物为KHCO3和少量K2SO3。K2SO3的生成直接影响到K2CO3的利用效率以及循环利用次数。KHCO3、K2CO3·1.5H2O均不与SO2单独发生反应。K2CO3与SO2反应缓慢,其产物为K2SO3;K2CO3与SO2和H2O的反应中,除有K2CO3·1.5H2O生成外,也有K2SO3和K4H2（CO3）3·1.5H2O生成,水蒸气的存在加速了分析纯（nalytical reagent,AR）K2CO3的失效过程。

英文摘要：

The carbonation reactivities of dry potassium-based sorbents in the simulated flue gases with a little SO2 were investigated.With thermogravimetric apparatus（TGA）,X-ray diffraction（XRD） methods and barium sulfate gravimetric methods,the effects of SO2 on the dry potassiumbased sorbents K2CO3 for CO2 capture were investigated and the reaction equation are inferred.Results show that KHCO3 and a little K2SO3 are generated in the simulated gas with a little SO2.The product K2SO3 reduces the utilization rate of K2CO3.KHCO3 or K2CO3·1.5H2O cannot react with SO2 alone.The reaction between K2CO3 with SO2 goes on slowly,and K2SO3 is generated.In the reaction among K2CO3,SO2 and H2O,besides the reaction product of K2CO3·1.5H2O,K2SO3 and K4H2（CO3）3·1.5H2O are generated.It can be thought that the existence of H2O accelerates the failor process of analytical reagent（AR） K2CO3.