PZ + AMP混合醇胺水溶液吸收二氧化碳之反應動力學數據量測研究

Kinetics of the Absorption of Carbon Dioxide into Mixed Aqueous solutions of Piperazine and 2-amino-2-methyl-1-propanol

林俊廷(Chun-Ting Lin)

指導教授 ： 李夢輝

中原大學/工學院/化學工程學系/碩士(2007年)

https://doi.org/10.6840/cycu200700473

摘要

本研究為探討摻和醇胺水溶液，對二氮已環(PZ)與二胺基二甲基
丙醇(AMP)，吸收二氧化碳之熱物性質及反應動力學數據量測研究。
所探討之溫度範圍為30, 35 及40℃，系统為2.0 及3.0 (kmol·m-3)之
AMP 水溶液系統中，分別加入0.1, 0.2, 0.3 及0.4 (kmol·m-3)之PZ，用
以評估AMP 水溶液系統中加入促進劑PZ，對於捕捉二氧化碳之吸收
速率影響。
本實驗以短濕壁柱裝置來測量二氧化碳與醇胺水溶液之比吸收
速率，而醇胺水溶液之物性數據，如密度、黏度以及氧化亞氮在混合
醇胺水溶液之亨利常數、擴散係數等也同時量測。而二氧化碳在混合
醇胺水溶液之亨利常數、擴散係數將由氧化亞氮相似定律估算。所量
測之吸收反應動力學數據經由兩種模式計算：(1)由擬一級反應模
式，結合AMP 複合離子模式。(2)由簡化質傳及化學反應平衡模式，
配合嚴謹的PZ + AMP 的反應機構。經過以上兩種模式的計算，可決
定出二氧化碳與醇胺PZ + AMP 之反應速率常數。
實驗結果顯示，在AMP 混合醇胺水溶液中，加入適量的PZ，確
實可以有效提升系統的反應速率。

關鍵字

反應動力學 ； 化學吸收 ； 擬一級反應模式 ； 二氧化碳

並列摘要

The objective of this research was to study both experimentally and
theoretically the absorption of carbon dioxide into aqueous blends of
piperazine (PZ) and 2-amino-2-methyl-1-propanol (AMP). The PZ with
concentrations of 0.1, 0.2, 0.3, and 0.4 (kmol·m-3) were blended into 2.0
and 3.0 (kmol·m-3) aqueous AMP solutions. The temperature ranges from
30 to 40 oC. The experiment can estimate the effect of absorption rate of
carbon dioxide for increasing PZ into AMP aqueous solution.
The specific CO2 absorption rate was measured using a wetted-wall
column apparatus. The physicochemical properties such as density,
viscosity, Henry’s law constant and diffusivity of nitrous oxide in amines
were also measured. The N2O analogy was used to estimate the Henry’s
law constant and diffusivity of CO2 in amines solutions. The experimental
reaction kinetics data were represented by two models：(1) Pseudo-first
order reaction mechanism incorporated with the zwitterion mechanism
for CO2-AMP reaction mechanism. (2) Simplified combined mass
transfer reaction kinetics equilibrium. Both of these two methods can
obtain the reaction rate constants of carbon dioxide with PZ and AMP.
The kinetics data of CO2/PZ/AMP/H2O were used to determine the
reaction rate constants for CO2/AMP, CO2/PZ. The determined reaction
rate constants were consistent for single amines and blend amine systems.
The result shows that increasing PZ in AMP aqueous solution can
raising the absorption rate of carbon dioxide of blended amine solution.

並列關鍵字

carbon dioxide ； absorption ； kinetics ； pseudo-first-order reaction

參考文獻

absorption in aqueous methyldiethanolamine. J. Chem. Eng. Data

2-amino-2-methyl-1-propanol and carbon dioxide. Ind. Eng. Chem.

kinetics of the reaction of carbon dioxide with amines in pseudo

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