MEA-DETA混合胺溶液吸收烟气中二氧化碳的研究

Experimental research of absorbing carbon dioxide from flue gas by MEA-DETA mixed amine solutions

采用搅拌实验装置对MEA为主体的二元混合胺溶液MEA-DETA体系吸收和解吸模拟烟道气中二氧化碳特性进行研究,揭示了该体系吸收速率、吸收容量和酸碱度与时间之间的内在联系,并与目前工业应用较广的MEA、DEA溶液进行了对比分析;对CO2初始逸出温度,试液再生温度,试液再生率,再生pH值下降率进行了细致记录与分析.实验结果表明:0.7 mol/L MEA-0.3 mol/L DETA是MEA-DETA混合胺体系中较佳的配比溶液,混合胺二种组分之间存在显著的负交互作用.

The absorption and desorption characteristic of simulated flue gas carbon dioxide was studied by different MEA and DETA proportion solutions in stirring experiment equipment.The relation among absorption rate,absorption capacity,desorption rate,pH and time was obtained.And the MEA-DETA system contrast analysis is conducted to MEA and DEA.Some data,such as start-emission-temperature of carbon dioxide,amine solutions regeneration temperature,amine solutions regeneration rate and pH decline rate in regeneration,were carefully recorded and analyzed.It is shown that 0.7 mol/L MEA-0.3 mol/L DETA is a better proportion solution of MEA-DETA mixed system.Also the result of experiment indicated that there is negative the mutual action with each other among two-amine components.