中文摘要：

纳米Ca O基吸附剂的吸附容量经历最初碳化和再生反应循环过程衰减后趋于稳定,研究了经过多次循环预处理后稳定的钙基吸附剂中纳米Ca O与CO2反应动力学。钙基CO2吸附剂预处理条件为碳化反应温度为600℃,再生反应温度为800℃循环42次。采用热重分析仪,在吸附温度550-630℃,CO2分压0.01-0.02 MPa条件下,测定预处理后得到的吸附剂中纳米Ca O与CO2的反应速率。通过优化气-固离子反应吸附模型的参数,拟合实验数据得到改进的反应动力学方程,求得反应活化能为77.7 kJ·mol^-1,约为新鲜吸附剂第一次吸附反应活化能的2.5倍。方程平均相对误差仅为6.4%。得到的改进动力学方程更真实反映吸附剂在稳定循环使用条件下的纳米Ca O与CO2反应动力学特性。

英文摘要：

During the initial carbonation-calcination looping, the sorption capacity of nano CaO based adsorbent will decay and then keep stable. This study concerns the modified kinetics of nano CaO with CO2 in a CaO-based CO2 adsorbent after pretreatment of multiple looping cycles to reach stable reaction properties. The condition of pre-treatment included carbonation temperature of 600℃ and calcination temperature of 800℃ for 42 cyclic runs. The measurements of reaction rate were carded on a thermo-gravimetric analysis at 550-630℃ under a N2 atmosphere with 0.010-0.020 MPa CO2 mole pressures. A gas-solid ion reactive adsorption model was accepted for further parameters optimized. The modified gas-solid ion reactive adsorption kinetics model was then used for the simulation of experimental data. The simulation result of activation energy for carbonation of the pre-treated adsorbent is 77.7 kJ·mol^-1 , which is 2.5 times than that of fresh nano CaO based adsorbent, and the average relative deviation of the CaO conversion is less than 6.4%. The reactive sorption rate in the fast surface reaction regime of nano CaO with CO2 is well represented by the modified gas-solid ion reactive adsorption model.