混合醇胺 (三級醇胺 DEEA + 多元胺DAP, DAB, DETA, EEDA, or MAPA) 水溶液之比熱量測研究

Heat capacity measurements for aqueous tertiary amine (DEEA) + polyamines (DAP, DAB, DETA, EEDA, or MAPA) solutions

林胤鳳(Yin-Feng Lin)

指導教授 ： 李夢輝

中原大學/工學院/化學工程研究所/碩士(2015年)

https://doi.org/10.6840/CYCU.2015.00245

摘要

本研究使用示差掃描熱量計(differential scanning calorimeter, DSC) 量測混合醇胺水溶液之摩爾比熱，溫度範圍為303.2353.2K，所量測之多元胺 (polyamines)分別為1,3-diaminopropane (DAP), 1,4-diaminobutane (DAB), diethylenetriamine (DETA), 3-(methylamino)propylamine (MAPA), N-ethylethylenediamine (EEDA) ,三級醇胺為N,N-diethylethanolamine (DEEA)。
純物質系統為DAP, EEDA, DEEA；雙成分系統 (DAP, EEDA, DEEA/H2O) 之濃度範圍為xamines = 0.10.9；三成分系統 (polyamine/DEEA/H2O) 則以水的濃度為70 wt%, 60 wt%做研究，當水的濃度為70 wt%，多元胺與三級醇胺濃度比例為 (5/25, 10/20, 15/15, 20/10, 25/5 wt%)；當水的濃度為60 wt%，多元胺與三級醇胺濃度比例為 (5/35, 10/30, 15/25, 20/20, 25/15, 30/10, 35/5 wt%)。
本研究所量測之純物質摩爾比熱，使用二次經驗方程式做計算；雙成分系統以RedlichKister-type equation來表示過剩摩爾比熱 ( )；三成分系統則是使用Söhnel and Novotný equation做計算。本研究所使用之關係式皆能得此實驗值和迴歸計算值具有良好的符合性，而此研究之結果可作為工廠使用吸收劑吸收二氧化碳時，設計汽提塔、熱交換器時的參考。

關鍵字

三級醇胺，多元胺，吸收劑，比熱

並列摘要

In this study, the heat capacities of ternary systems of polyamine (DAP, DAB, DETA, EEDA, MAPA)/DEEA/H2O were measured over the temperature range 303.2 to 353.2 K and different solute concentrations: polyamine/DEEA (5/35, 10/30, 15/25, 20/20, 25/15, 30/10, 35/5 wt%) + water (60wt%) and polyamine/DEEA (5/25, 10/20, 15/15, 20/10, 25/5 wt%) + water (70wt%) using a heat flow differential scanning calorimeter (DSC).
For the pure system, the dependence of the molar heat capacity with temperature was correlated by a second order equation. For binary systems, a Redlich-Kister-type equation was used to calculate the molar heat capacities and excess molar heat capacities. The data were then reported as function of temperature and composition. For the ternary systems, an equation proposed by Söhnel and Novotny was used to represent the measured heat capacity data. Results show that the measured heat capacity data were satisfactorily correlated using the applied correlations. Thus, it can be said the proposed correlations in this study can be utilized to yield reliable estimates of the heat capacities of the studied systems.

並列關鍵字

heat capacity ； CO2 absorption ； polyamine

參考文獻

梁凱菱，五種多胺類水溶液之摩爾比熱量測研究，中原大學化工所，2014

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