碳酸钙热分解机理的热重试验研究  

Thermogravimetric experiment research on thermal decomposition mechanics of calcium carbonate

作　　者：齐庆杰[1] 马云东[1] 刘建忠[2] 曹欣玉[2] 岑可法[2] 

机构地区：[1]辽宁工程技术大学资源与环境工程学院,辽宁阜新123000 [2]浙江大学机械与能源工程学院,浙江杭州310027

出　　处：《辽宁工程技术大学学报（自然科学版）》2002年第6期689-692,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金项目(59876036);国家"973"计划项目(G1999022211)

摘　　要：碳酸钙热分解是炉内喷钙脱硫过程中一个重要反应,对脱硫率有较大的影响。本文采用热重技术研究碳酸钙热分解机理。在热重分析的基础上,按不同化学反应机理求解反应动力学参数和回归误差,根据相关系数最小的原则确定最佳分解机理。研究结果表明相界反应(球形对称)是喷钙脱硫过程中碳酸钙热分解主要机理,石灰石细粉的高温分解时间在10-2 s数量级,可将喷钙脱硫过程的CaCO3热分解过程和脱硫反应过程看作相对独立的反应过程。实验结果与文献结果有较好的一致性。The thermal decomposition of calcium carbonate is an important chemical reaction during the desulfurization by furnace injecting calcium, and it can produce a great impact on the desulfurizing efficiency. In this paper, the thermal decomposition mechanics of calcium carbonate are studied by thermogravimetric technique. On the basis of thermogravimetric analysis, the reaction kinetics parameters and regression error are calculated according to different chemical reaction mechanics, and the optimal thermal decomposition mechanics are defined in accordance with the minimum principle of correlation coefficient. The research results show that the mechanics of phase interface reaction R3(α) is the main mechanics during the desulfurization by furnace injecting calcium. And the experimental result shows good agreement with the literature result.

关 键 词：试验研究 碳酸钙 脱硫 热重分析 热分解机理 炉内喷钙脱硫 石灰石 

分 类 号：TQ132.32[化学工程—无机化工]