混合醇胺( 立體障礙醇胺 AMPD，AHPD ) + 多元胺 ( HMDA，DETA，MAPA ) 水溶液之莫耳比熱量測研究

Molar heat capacity of aqueous blended amine systems containing sterically hindered amines (2-Amino-2-hydroxylmethyl-1,3-propanediol, 2-Amino-2-methyl-1,3-propanediol) and polyamines (Diethylenetriamine, 3-Methylaminopropylamine and 1,6-Hexanediamine)

李柏汶(Po-Wen Li)

指導教授 ： 李夢輝

中原大學/工學院/化學工程研究所/碩士(2018年)

https://doi.org/10.6840/cycu201800499

摘要

摘要
本研究以示差掃描熱分析儀 (Differential Scanning Calorimeter, DSC) 量測混合醇胺水溶液之莫耳比熱。本實驗所使用之立體障礙醇胺分別為2-amino-2-hydroxylmethyl-1,3-propanediol (AHPD)、2-amino-2-methyl-1,3-propanediol (AMPH) 與多元胺Diethylenetriamine (DETA)、3-methylaminopropylamine (MAPA)、1,6-Hexanediamine (HMDA)。
純物質系統 (pure amine) 量測立體障礙醇胺AHPD及AMPD；雙成分系統 (Sterically hinderd amine / H2O)，(AHPD / H2O) 濃度範圍在莫耳分率x_amine=0.01-0.07；(AMPD / H2O) 濃度範圍在莫耳分率x_amine=0.05-0.2； 三成分系統 (Sterically hinderd amine / polyamine / H2O) 則固定水的濃度為60 wt% 以及 70 wt%，當水濃度為60 wt%時，立體障礙醇胺與多元胺濃度比例為 (15/25、10/30、5/35 wt%)。當水濃度為70 wt%時，三級醇胺與多元胺濃度比例為 (25/5、20/10、15/15、10/20、5/25 wt%)。量測溫度範圍為303.15 – 353.15K，本實驗之不確定性 (uncertainty) 為 2%。
實驗所測量之純物質莫耳比熱值，以二次經驗方程式進行迴歸計
算；雙成分系統以Redlich-Kister-type equation進行迴歸；三成分系統則使用Söhnel and Novotný關係式作迴歸計算。比較迴歸計算結果與實驗值，本研究結果可作為工業程序設計的計算依據，工廠設計氣提塔、熱交換器及冷卻水用量時的重要依據。

關鍵字

二氧化碳 ； 吸收劑 ； 立體障礙醇胺 ； 比熱

並列摘要

Abstract
In this study, the molar heat capacity of blended amine systems was determined by Differential Scanning Calorimeter (DSC). The Sterically hinderd amine 2-amino-2-hydroxylmethyl-1,3-propanediol (AHPD)、2-amino-2-methyl-1,3-propanediol (AMPD) , and polyamines Diethylenetriamine (DETA)、3-methylaminopropylamine (MAPA)、1,6-Hexanediamine (HMDA) were applied for this measurement.
The experiment was carried out under atmospheric pressure, and the temperature was in the range of 303.15 – 353.15 K. For pure amine system, the heat capacity of Sterically hinderd amine AHPD, AMPD were presented in this work. The binary aqueous Sterically hinderd amine systems AHPD was studied in the concentration of 0.01 - 0.07 molar fraction and AMPD was studied in the concentration of 0.05 - 0.2 molar fraction. And the ternary systems, including blended Sterically hinderd amines and polyamines, were investigated at total amine 30 wt% and 40 wt%. The estimated overall uncertainty of measured C_p was 2%.
For the pure systems, the regression was accomplished by the used of second order empirical equation. The Redlich-Kister-type equation was respectively applied to represent the experiment data of binary system and modified Söhnel and Novotný equation was respectively applied to represent of ternary system. The results show a good agreement between experiment data and regressive calculations.
The results of this study can be used as the basis data for the calculation of industrial procedures. Like the design of stripping tower, heat exchanger and consumption of cooling water.

並列關鍵字

Carbon dioxide ； CO2 absorption ； heat capacity

參考文獻

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