醇胺水溶液之交互擴散係數量測

Measurements of Diffusion Coefficient of Aqueous Alkanolamines Solutions

張力璁(Li-Chung Chang)

指導教授 ： 李夢輝

中原大學/工學院/化學工程研究所/碩士(2004年)

https://doi.org/10.6840/cycu200400410

摘要

摘要

本研究為量測醇胺水溶液 DGA (diglycolamine), TEA (triethanolamine), AMP (2-amino-2-methyl-1-propanol), 2-PE (2-piperidine ethanol) 在水溶液中之無限稀釋擴散係數以及交互擴散係數數據( mutual diffusion coefficient )。測量方法是根據泰勒分散法（Taylor dispersion method）之原理來測量。實驗操作在一大氣壓下；溫度範圍為30至70 oC；濃度範圍為0.5至3 (or 4) kmol/m3，實驗儀器以及操作條件參考學者Alizadeh等人在1980年所提供的方法。實驗先量測甲醇+水的擴散係數並與文獻值比較以確認。量測方法之正確性。實驗所得數據由一簡單關係式來表示(Snijder et al., 1993)。並由UNIDIF模式(Hsu and Chen, 1998)¬ 來表示而決定參數。再由RHS (rough hard sphere theory)理論(Dymond, 1974)來解釋實驗上所取得的擴散係數跟溫度、濃度的關係。量測擴散係數可提供二氧化碳與混合醇胺水溶液之反應動力學基礎數據。

關鍵字

醇胺 ； 擴散係數

並列摘要

Abstract

This study presents the measurements of the diffusion coefficients of alkanolamines in water at infinite dilution and the mutual diffusion coefficients of four aqueous diglycolamine, triethanolamine, 2-amino-2-methyl-l-propanol, and 2-piperidineethanol solutions. The diffusivity has been measured based on the Taylor dispersion method. Experimental work was performed at atmospheric pressure. The temperature range was from 30 to 70 oC, and the concentration of amine from 0.5 to 3 (or 4) kmol/m3. The apparatus and experimental conditions are consistent with the criteria proposed by Alizadeh et al. (1980). Experiment with the binary system of methanol and water showed that the experimental setup provides accurate mutual diffusion coefficient data. The diffusion coefficients of alkanolamines in water at infinite dilution are found to be varied systematically with the molar mass of the alkanolamines. The obtained mutual diffusion coefficients were correlated by using both a simple relation of Snijder et al. (1993) and by the UNIDIF equation (Hsu and Chen, 1998). The rough hard sphere theory (RHS) (Dymond, 1974) also successfully describes the experimental mutual diffusivities obtained in this study. Mutual diffusion coefficients can be used to model the kinetics of the reaction between CO2 and aqueous alkanolamines solutions.

並列關鍵字

Diffusion Coefficient ； Alkanolamines

參考文獻

林東億，醇胺在醇胺水溶液中之擴散係數量測研究，中原大學化工所，2003年。

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