摘要
对CaO吸收CO2反应的特性进行了实验研究,采用未反应收缩核模型分析碳酸化反应动力学特性.结果表明,化学反应速率常数在650℃～750℃范围内基本为一常数,产物层扩散系数随着温度的增加而增大.化学反应控制段的活化能Ea=29.70kJ/moL,产物控制段的活化能Ea=92.80kJ/moL.温度一定时,随着CO2体积分数增加,碳酸化反应速率加快,转化率增大.
The reaction characteristics of CaO absorbing CO2 were investigated by discus- sing the influence of reaction conditions on the carbonated reaction and analyzing the dynamic property with unreacted shrinking core model. The results showed that the chemical reaction rate constant of the carbonation reaction is nearly a constant at 650 ℃-750 ℃ ; the product layer diffu- sion coefficient increasing with the increase of temperature; the activation energy of chemical reaction control section was Ea=29.70 kJ/mol, and of the product control section was Ea =92.80 kJ/mol; with the volume fraction of CO2 increasing, the reaction rate and conversion rate increased.
出处
《煤炭转化》
CAS
CSCD
北大核心
2012年第2期85-88,共4页
Coal Conversion
基金
国家重点基础研究发展计划(973)项目(2009CB623102)
中国科学院多相复杂系统国家重点实验室课题资助项目(MPCS-2011-D-01)
关键词
碳酸化
CAO
反应动力学
活化能
carbonation, CaO, reaction kinetics, activation energy
