高校化学工程学报Issue(1)：96-101,6.DOI:10.3969/j.issn.1003-9015.2015.01.014
钙基吸附剂中纳米CaO与CO2反应动力学模型的改进
Modified Kinetics Model of Nano CaO Reactions with CO2 in a CaO-Based Adsorbent
摘要
Abstract
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.关键词
纳米CaO/CO2吸附剂/反应动力学/钙循环Key words
nano CaO/CO2 adsorbents/kinetics/calcium looping分类
化学化工引用本文复制引用
史余耀,兰培强,王燕,吴素芳..钙基吸附剂中纳米CaO与CO2反应动力学模型的改进[J].高校化学工程学报,2015,(1):96-101,6.基金项目
国家自然科学基金项目(20876142)。 （20876142）
