CaO再碳酸化的研究  

Research on the carbonation reaction of CaO

作　　者：陈小华[1] 郑瑛[1] 郑楚光[1] 赵海波[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室

出　　处：《华中科技大学学报（自然科学版）》2003年第4期54-55,65,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点基础研究专项经费资助项目 (G1 9990 2 2 2 0 5 ) ;国家自然科学基金资助项目 (5 0 0 0 6 0 0 2 )

摘　　要：建立了CaO再碳酸化的微粒模型 ,研究了CO2 体积分数、反应温度等因素对反应的影响 .研究表明 ,在本实验条件下 ,存在一个最佳再碳酸化温度 (在 6 80～ 730℃之间 ) .当温度过高时 ,部分产物发生分解 ,气体通过产物层的扩散阻力随着温度的增加而变大 。A grain model for carbonation reaction of CaO was built. The effects of such factors as CO 2 concentration and reaction temperature on the reaction were studied. The results showed that the carbonation reaction characteristics of CaO were consistent with product layer diffusion controlled mechanism. CO 2 concentration and the best temperature for the reaction was between 680～730?℃. When the temperature was higher, some parts of product began to decompose. The diffusion obstacle increased with the increase of the temperature, and the clogging in some parts of gaps caused the conversion to decrease.

关 键 词：CAO 再碳酸化 扩散 氧化钙 微粒模型 体积分数 反应温度 脱硫 石灰石 碳酸钙 

分 类 号：TQ132.32[化学工程—无机化工]