- 學位論文
混合胺類水溶液含立體障礙醇胺(AHPD或AEPD)與多元胺(AEEA或DEEA或TETA)之摩爾比熱量測研究
Molar Heat Capacities of Aqueous Alkanolamine Solutions Containing Sterically Hindered Amine (AHPD or AEPD) And Polyamine (AEEA or DEEA or TETA)
摘要
本研究使用示差掃描熱量計(Differential Scanning Calorimeter, DSC)量測混合醇胺胺水容液之比熱，溫度範圍303.2K-353.2 K，所量測之立體障礙醇胺分別為2-Amino-2-ethyl-1,3-propanediol(AEPD)、2-Amino-2-hydroxymethyl-1,3-propanediol (AHPD)與多元胺分別為Diethyl Ethanol Amine (DEEA)、Amino-ethyl-ethanolamine (AEEA) 及Tri-ethylene-tetramine (TETA)。 純物質系統為AEPD、AHPD、DEEA、AEEA、TETA；雙成分系統(AEPD, AHPD, DEEA, AEEA, TETA/H2O)濃度範圍為xamines = 0.1-0.9；三成分系統(Polyamines/Alkanolamine/ H2O)或是(Alkanolamine / Polyamines / H2O)，濃度比例為 (18/12, 21/9, 24/6, 27/3 wt%)，水的濃度為70 wt%。 本研究所量測純物質比熱，結果由溫度二次方程式來表示；雙成分系統以Redlich Kister-type equation表示過剩莫爾比熱(Cp)；三成分系統則是使用Söhnel and Novotný equation來表示。本研究所使用的關係式代表實驗值的數值，本研究的結果可作為工廠使用吸收劑吸收二氧化碳時程序設計之參考依據。
關鍵字
混合胺類水溶液並列摘要
In this study, the molar heat capacity of sterically hindered amines and polyamines were measured over the temperature range from 303.2 to 353.2 K . They are the alkanolamine 2-amino-2-ethyl-1,3-propanediol(AEPD), 2-amino-2-hydroxymethyl-1,3-propanediol (AHPD), and polyamines diethyl-ethanol-amine (DEEA),Amino-ethyl-ethanolamine (AEEA), tri-ethylene-tetramine (TETA). The heat capacities of their corresponding binary mixtures with water at concentrations (10 to 90 ) mol% amine, and ternary mixtures containing polyamines or alkanolamine were also measured. The total amine concentration of the ternary systems was fixed at 30 wt% while varying the mixtures amine mass ratios at 18/12, 21/9, 24/6, and 27/3 . A second order equation was used to represent the temperature systems, the excess molar heat capacities were determined, and the data were correlated with temperature and amine mole fraction using a Redlich Kister-type equation. The absolute deviations (AAD) between the experimental and the calculated data of 0.12 and 1.8 for Cp and CpE are respectively. Also, a modified Söhnel and Novotný equation suitably represented the temperature and concentration dependence of the Cp of the ternary systems at an AAD of less 0.12 . From these results, it can be concluded that the presented data and the applied models in this study can be used in process engineering to yield accurate prediction .