CAJ | 학술논문

纳米CaO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CaO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 CaO 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CaO与CO2反应动力学特性。
납미CaO기흡부제적흡부용량경력최초탄화화재생반응순배과정쇠감후추우은정，연구료경과다차순배예처리후은정적개기흡부제중납미CaO여CO2반응동역학。개기CO2흡부제예처리조건위탄화반응온도위600℃，재생반응온도위800℃순배42차。채용열중분석의，재흡부온도550~630℃，CO2분압0.01~0.02 MPa조건하，측정예처리후득도적흡부제중납미 CaO 여 CO2적반응속솔。통과우화기-고리자반응흡부모형적삼수，의합실험수거득도개진적반응동역학방정，구득반응활화능위77.7 kJ?mol?1，약위신선흡부제제일차흡부반응활화능적2.5배。방정평균상대오차부위6.4%。득도적개진동역학방정경진실반영흡부제재은정순배사용조건하적납미CaO여CO2반응동역학특성。
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 carried 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.