Kinetics study of CO_(2) absorption in potassium carbonate solution promoted by diethylenetriamine  

作　　者：Rouzbeh Ramezani Renzo Di Felice 

机构地区：[1]Department of Civil,Chemical and Environmental Engineering,University of Genoa,Via Opera Pia 15,16145,Genova,Italy

出　　处：《Green Energy & Environment》2021年第1期83-90,共8页绿色能源与环境（英文版）

摘　　要：In this work,characterization and kinetics of CO2 absorption in potassium carbonate(K_(2)CO_(3))solution promoted by diethylenetriamine(DETA)were investigated.Kinetics measurements were performed using a stirred cell reactor in the temperature range of 303.15–323.15 K and total concentration up to 2.5 kmol m3.The density,viscosity,physical solubility,CO_(2) diffusivity and absorption rate of CO_(2) in the solution were determined.The reaction kinetics between CO_(2) and K2CO3þDETA solution were examined.Pseudo-first order kinetic constants were also predicted by zwitterion mechanism.It was revealed that the addition of small amounts of DETA to K_(2)CO_(3) results in a significant enhancement in CO_(2) absorption rate.The reaction order and activation energy were found to be 1.6 and 35.6 kJ mol1,respectively.In terms of reaction rate constant,DETA showed a better performance compared to the other promoters such as MEA,EAE,proline,arginine,taurine,histidine and alanine.

关 键 词：Gas absorption CO_(2)capture Reaction rate constant Kinetic study Absorption rate 

分 类 号：X701[环境科学与工程—环境工程]