混合醇胺MEA/MDEA水溶液吸收二氧化碳之反應動力學數據量測研究

Measurement of the Reaction Kinetics of CO2 with aqueous MEA/MDEA solutions

廖振宏(Chen-Hung Liao)

指導教授 ： 李夢輝

中原大學/工學院/化學工程研究所/碩士(2001年)

https://doi.org/10.6840/cycu200100073

摘要

本研究主要為使用溼壁柱裝置來量測並探討CO2與混合醇胺MEA/MDEA水溶液的反應動力學，其濃度範圍為MEA (0.1-0.5 kmol·m-3) / MDEA (1.0 kmol·m-3)及MEA (0.1-0.5 kmol·m-3) / MDEA (1.5 kmol·m-3)，溫度範圍是30、35及40°C。

對於CO2，本研究以pseudo-first-order的模式來描述，而對於MEA、MDEA則用混和擬一級反應與兩性離子機構來描述。而二氧化碳在混合醇胺MEA/MDEA水溶液中之亨利常數及擴散係數是以N2O類比理論求得。由實驗結果可發現，本研究的實驗符合先前的假設，且混和擬一級反應與兩性離子機構可以用來解釋MEA、MDEA與CO2的反應。

關鍵字

醇胺

並列摘要

The kinetics of the reaction between CO2 and MEA ( monoethanolamine ) and MDEA ( N-methyldiethanolamine ) were investigated at 30, 35, 40℃ by a wetted wall column. The concentrations studied were MEA (0.1-0.5 kmol‧m-3) / MDEA (0.1-0.5 kmol‧m-3).
A Hybrid Kinetic Model has been used to describe the reaction of CO2 with MEA and MDEA. The solubility and diffusivity in aqueous solution blends MEA and MDEA were estimated by N2O analogy. For the experiment as result，we find that the Hybrid Kinetic Model can explain the reaction
of CO2 with MEA and MDEA .

並列關鍵字

MDEA ； MEA

參考文獻

Al-Ghawas, H. A.; Hagewlesche, D. P.; Ruiz-Ibanez, G.; Sandall, O. C. Physicochemical Properties Important for Carbon Dioxide Absorption in Aqueous Methyldiethanolamine. J. Chem. Eng. Data 1989, 34, 385-391.

Alper, E. Absorption of a Gas into a Solution Containing Two Reactants. Chem. Eng. Sci. 1972, 27, 649-650.

Alvarez-Fuster, C.; Midoux, N.; Laurent, A.; Charpentier, J. C. Chemical Kinetics of the Reaction of Carbon Dioxide with Amines in Pseudo m-nth Order Conditions in Aqueous and Organic Solutions. Chem. Eng. Sci. 1980, 35, 717-723.

Alvarez-Fuster, C.; Midoux, N.; Laurent, A.; Charpentier, J. C. Chemical Kinetics of the Reaction of CO2 with Amines in Pseudo m-nth Order Conditions in Polar and Viscous Organic Solutions. Chem. Eng. Sci. 1981, 36, 1513-1518.

Astarita, G.; Savage, D. M.; Longo, J. M. Promotion of CO2 Mass Transfer in Carbonate Solutions. Chem. Eng. Sci. 1981, 36, 581-588.