CO_(2(气))-NaOH_((液))气液反应速率  

Investigation on the rate of reaction between CO_2 gas and NaOH liquor phases

作　　者：陈滨[1] 李小斌[1] 刘桂华[1] 彭志宏[1] 周秋生[1] 徐晓辉[1] 刘祥民[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《广东有色金属学报》2006年第3期168-172,共5页Journal of Guangdong Non-Ferrous Metals

基　　金：国家自然科学基金资助项目(50274076)

摘　　要：对二氧化碳中和氢氧化钠的反应过程进行了系统地研究.CO2浓度、温度、NaOH起始浓度对反应过程的影响进行了分析,并获得了反应过程的宏观动力学方程.结果表明,该过程的表观活化能仅为8.06KJ/mol,可认为该过程是扩散控制过程.根据扩散控制原理,推导出了反应速率rd与气体流量Q之间的理论关系,即rd=K′DkCA(Q/Vl)2/3.同时还研究了气体流量对反应过程的影响,结果表明,气体流量Q与体积Vl之比的级数为0.61,与理论上推导的2/3非常地接近,证明了理论推导的正确性.The neutralization of sodium hydroxide by carbon dioxide occurring during the process of carbonization precipitation of sodium aluminate solution was investigated. Firstly, the effects of those main factors such as CO2 concentration,temperature,initial concentration of NaOH were investigated. Then the kinetics equation concerning this reaction was obtained after proper data treatment. The results showed that it assumes an apparent activation energy of 8. 06 kJ/mol which indicated a diffusion-controlled process. Furthermore, based on the principles governing diffusion-controlled process, the dependence of neutralization rate on gas flow was deduced theoretically with a form as：rd=K＇DkCA （Q/V1）2/3 whose plausibility was validated by those experimental research thereafter.

关 键 词：气液反应 氢氧化钠 二氧化碳 扩散控制 动力学 反应速率 气体流量 

分 类 号：TF801[冶金工程—有色金属冶金]