氣液平衡量測研究:CO2/PZ/TEA/H2O系統

Vapor-Liquid Equilibrium Measurements for CO2/PZ/TEA/H2O Systems

鐘培元(Pei-Yuan Chung)

指導教授 ： 李夢輝

中原大學/工學院/化學工程研究所/碩士(2009年)

https://doi.org/10.6840/cycu200901153

摘要

本研究主要量測酸性氣體二氧化碳在混合醇胺水溶液系統(Triethanolamine (TEA) + Piperazine (PZ) + Water (H2O))下的氣液平衡溶解度數據，所探討的系統濃度分別為:2 kmol × m-3 TEA + 0.5 ～1.5 kmol × m-3 PZ 以及 3 kmol × m-3 TEA + 0.5～1.5 kmol × m-3 PZ；溫度範圍為40, 60, 以及 80 °C；二氧化碳分壓範圍為0.7～160 kPa。
迴歸部份選擇以Kent and Eisenberg (1976) 提出的熱力學模式來建立本系統的氣液平衡熱力學模式，並利用所建立的熱力學模式來描述本實驗的數據，最終可以得到令人滿意的結果。
而在文獻上的氣液平衡數據獨缺本研究所選擇的系統TEA + PZ + H2O ，所以除了提供一組新的實驗系統數據之外，所建立的熱力學計算模式也可作為吸收酸性氣體設備方面的參考依據。

關鍵字

氣液平衡 ； 二氧化碳 ； 醇胺

並列摘要

New experimental results have been presented for the solubilities of carbon dioxide in mixtures of Triethanolamine (TEA) + Piperazine (PZ) + Water (H2O) have been measured at 40, 60, and 80 °C and at partial pressures of acid gases up to 160 kPa.
The concentration ranges of the ternary mixtures studied were 2 kmol × m-3 TEA + 0.5 to 1.5 kmol × m-3 PZ and 3 kmol × m-3 TEA + 0.5 to 1.5 kmol × m-3 PZ aqueous solutions.
The modified Kent-Eisenberg model has been used to represent the solubility of mixtures of CO2 in the considered ternary solutions. And the model reasonably reproduces the equilibrium partial pressures of CO2 above the ternary solutions for the systems.

並列關鍵字

vapor-liquid equilibrium ； carbon dioxide

參考文獻

Atwood, K.; Arnold, M. R.; Kindrick, R. C. Equilibrium for The System, Ethanolamines-Hydrogen Sulfide-Water. Ind. Eng. Chem. 1957, 49, 1439.

Austgen, D. M.; Rochelle, G. T. Model of Vapor-Liquid Equilibria for Aqueous Acid Gas-Alkanolamine Systems. 2. Representation of H2S and CO2 Solubility in Aqueous MDEA and CO2 Solubility in Aqueous Mixture of MDEA with MEA or DEA. Ind. Eng. Chem. Res. 1991, 30, 543.

Austgen, D. M.; Rochelle, G. T.; Chen, C. C. A Model of Vapor-Liquid Equilibria for Aqueous Acid Gas-Alkanolamine Systems using the Electrolyte-NRTL Equation. Ind. Eng. Chem. Res. 1989, 28, 1060.

Bishnoi, S.; Rochelle, G. T. Absorption of Carbon Dioxide into Aqueous Piperazine: Reaction Kinetics, Mass Transfer and Solubility. Chem. Eng. Sci. 2000a, 55, 5531.

Bishnoi, S.; Rochelle, G. T. Physical and Chemical Solubility of Carbon Dioxide in Aqueous Methyldiethanolamine. Fluid Phase Equilibria 2000b, 168, 241.