Reactivity study and kinetic evaluation of CuO-based oxygen carriers modified by three different ores in chemical looping with oxygen uncoupling(CLOU)process  

作　　者：Cao Kuang Shuzhong Wang Ming Luo Jun Zhao 

机构地区：[1]Key Laboratory of Thermo-Fluid Science and Engineering of MOE,School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China [2]School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第9期54-63,共10页中国化学工程学报（英文版）

基　　金：financial support by the Fundamental Research Funds for the Central Universities(xjh012019019);the National Natural Science Foundation of China(51606087)。

摘　　要：In the chemical looping with oxygen uncoupling(CLOU)process,CuO is a promising material due to the high oxygen carrier capacity and exothermic reaction in fuel reactor but limited by the low melting point.The combustion rate of carbon is faster than the decoupling rate of oxygen carrier(OC).Hence,high temperature tolerance and rapid oxygen release rate of CuO modified by three different ores were investigated in this study.The kinetics analysis of oxygen decoupling with Cu-based oxygen carriers was also evaluated.Results showed that CuO modified by chrysolite had faster oxygen release rate than that of CuO.Limestone showed obvious positive effect on the oxidization process.The selected OCs could keep stable in at least 20 cycles,for about 1200 min.Shrinking core model(SCM)fitted well for the decoupling process in the temperature range of 1123-1223 K.Reduction rate kinetic information may aid in the development of chemical looping with oxygen uncoupling(CLOU)technologies during reactor design and process modeling.Ternary doped copper oxide with chrysolite and limestone could improve the reactivity of CuO in decoupling and coupling process and also improve the high temperature tolerance.

关 键 词：Reaction kinetics Chemical looping with oxygen uncoupling(CLOU) Sintering Natural ore CO_(2)capture 

分 类 号：TQ038[化学工程]