Liquid Heat Capacity of Aqueous Sulfolane+2-amino-2-methyl-1-propanol Solutions

環風烷＋2-胺基－2-甲基－1-丙醇水溶液態比熱

何聖智(Sheng-Chih Ho) ； 陳季妙(Ji-Miao Chen) ； 李夢輝(Meng-Hui Li)

《Journal of the Chinese Institute of Chemical Engineers》 38卷3&4期 (2007/07) Pp. 349-354

摘要

本文係以差示掃描熱量計來量測環風烷＋2-胺基－2-甲基－1-丙醇水溶液在溫度（303.15至353.15）K之液態比熱。量測範圍涵蓋水之摩爾分率為（0.6至0.8）之12個三成份溶液系統。環風烷、環風烷水溶液及環風烷＋2-胺基－2-甲基－1-丙醇系統之液態比熱也同時量測。量測之環風烷及量風烷水溶液之液態比熱和文獻值比較有很好的一致性。變成份及三成份之液態比熱和成份之關係由雷德許－季斯特關係式來表示。對於所量測的132個實驗數據點，計算結果（全部平均絕對百分比誤差）分別為；液態摩爾比熱0.3%；及過剩液態摩爾比熱7.7%。本研究之液態摩爾比熱結果，可應用在以環風烷及2-胺基－2-甲基－1-丙醇水溶液為吸收液之吸收程序設計上計算熱值之參考依據。

並列摘要

Heat capacities of aqueous solutions of sulfolane with 2-amino-2-metyl-1-propanol(AMP) were measured over the temperature range from 303.15 to 353.15 K with a differential scanning calorimeter. Twelve solutions of sulfolane+AMP+water that cover the mole fractions of water from 0.6 to 0.8 were studied. The liquid heat capacities of sulfolane alone and of binary mixtures such as sulfolane+water and sulfolane+AMP were also studied. The heat capacities of sulfolane and sulfolane+water were found to be in good agreement with those values reported in the literature. A Realich-Kister type equation was applied to represent the composition dependence of the heat capacities of binary and ternary systems. For 132 data points of sulfoland+AMP+water, the fitted results of heat capacity calculations (overall average absolute percentage deviations (AAD%)) were 0.3 and 7.7% for the molar heat capacity and the excess molar heat capacity, respectively. The heat capacities of aqueous mixtures of sulfolane with AMP presented in this study can be used to estimate the head load of absorbents in acid gas capture process when using sulfolane+AMP+water as the absorbent.

並列關鍵字

Liquid heat capacity ； Sulfolane ； 2-Amino-2-methyl-1-propanol ； Gas absorption