碳酸锂常压鼓泡碳化宏观反应动力学研究  

Macro-kinetics study on bubbling carbonation of Li_2CO_3 slurries at atmospheric pressure

作　　者：伊文涛[1] 闫春燕[1] 马培华[2] 

机构地区：[1]枣庄学院化学化工系,山东枣庄277160 [2]中国科学院青海盐湖研究所,青海西宁810008

出　　处：《化工矿物与加工》2009年第3期1-4,27,共5页Industrial Minerals & Processing

基　　金：国家"十五"科技攻关计划滚动支持项目(2004BA602B-01)

摘　　要：基于Li2CO3与CO2在水溶液中的反应,在浆态鼓泡床反应器内对粗Li2CO3常压鼓泡碳化反应的动力学进行了实验研究,且对影响碳化过程的诸因素进行了深入的研究和探讨。结果表明,Li2CO3的转化率随表观气速的增大而增大,随反应温度、固体质量浓度、颗粒粒径、反应器中浆料填充度的增大而减小。动力学研究表明:在反应的前期过程受控于化学反应,随反应的进行该过程逐渐转变为内扩散控制。通过对实验数据的拟合得出了实验范围内过程的宏观动力学方程。该研究为Li2CO3碳化工艺条件的优化和反应器的放大设计等提供了基础数据。Based on the reaction of Li2CO3 with CO2-water solutions to convert the former to water-soluble LiHCO3, macro-kinetics on Li2CO3 carbonation by bubbling CO2 at atmospheric pressure was studied. The experiments were carried out in a slurry bubble column reactor with inner diameter 0.05 m and height 0.5 m. Parameters that may affect the dissolution of Li2CO3 were investigated. It was found that the dissolution rate of Li2CO3 increased with increasing CO2 flow rate, and with decreasing Li2CO3 particle size, reaction temperature, solid concentration and slurry height in the column. The results showed that the process was controlled by chemical reaction at earlier stage, while transferred to inner diffusion control later. The macro-kinetics equations in the experimental range were obtained by data fitting, and the apparent activation energies were calculated. The study provides theoretical basis for the reactor design and the optimization of the process operation.

关 键 词：Li2CO3料浆 鼓泡碳化 常压 宏观动力学 

分 类 号：TQ013.2[化学工程] TQ131.11