CO2(g) - NaOH(L)气液反应速率.pdf

1 Investigation on the rate of reaction between gas (CO ) and liquor (NaOH) phases 2 CHEN Bin(陈滨) ，LI Xiao-bin （李小斌）*，LIU Gui-hua （刘桂华），PENG Zhi-hong （彭志宏）， ZHOU Qiu-sheng （周秋生），XU Xiao-hui （徐晓辉），LIU Xiang-min （刘祥民） ( School of Metallurgical Science and Engineering ,Central South University, Changsha 410083, P.R.China) Abstract ：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: r =KD C (Q/V ) 2/3 whose d K A L plausibility was validated by those experimental research thereafter. Key words ：reaction between gas liquor phase ；sodium hydroxide；carbon dioxide ；diffusion control ；kinetics CLC number: TF801 Document code: A 1．