立體障礙醇胺+鹽類水溶液之比熱量測研究

Heat capacity measurements for aqueous solutions containing sterically hindered amines and salts

奧莉薇(Rhedita-Wanda Olivia)

指導教授 ： 李夢輝

中原大學/工學院/化學工程研究所/碩士(2013年)

https://doi.org/10.6840/CYCU.2013.00088

摘要

中文摘要

本研究使用示差掃描熱量計 (Differential Scanning Calorimetry) 量測立體障礙醇胺+鹽類水溶液之比熱量測研究。量測溫度範圍為303.15 K－353.15 K。而本實驗主要研究之立體障礙醇胺為2-amino-2-ethyl-1,3-propanediol (AEPD)、2-amino-2-methyl-1,3-propanediol (AMPD)、2-tert-butylamino ethanol (TBAE) 之水溶液，以及添加piperazine (PZ)、lithium chloride (LiCl) 或lithium bromide (LiBr) 之三成分系統。
雙成分系統使用Redlich  Kister type equation作迴歸計算。實驗數據迴歸後，AAD為0.1%；三成分系統則利用Söhnel-Novotný type equation作迴歸計算。下列三成分系統PZ / LiCl / LiBr + AEPD + H2O、PZ / LiCl / LiBr + AMPD + H2O及PZ / LiCl / LiBr + TBAE + H2O之AAD分別為0.2 %、0.1 % 以及 0.1 %。
本研究結果提供二氧化碳吸收劑之比熱數據，這些數據可應用於工程上之設計，亦可作為熱力學之基礎數據的計算依據。

關鍵字

吸收劑 ； 醇胺 ； 鹽類水溶液 ； 比熱

並列摘要

Abstract

The heat capacity of pure sterically hindered amines (SHAs) 2-amino-2-ethyl-1,3-propanediol (AEPD), 2-amino-2-methyl-1,3-propanediol (AMPD), 2-tert-butylamino ethanol (TBAE), their aqueous solutions, and their ternary systems containing piperazine (PZ), lithium chloride (LiCl) and lithium bromide (LiBr), were reported at the temperature range of 303.15 to 353.15 K. the measurements were performed by using Differential Scanning Calorimetry (DSC) 2010 by TA Instruments. The measured heat capacities of the binary systems were represented by Redlich-Kister type equation. The correlations yielded satisfactory results as indicated by the overall average absolute percent deviations (AAD) of 0.1 %.
Söhnel-Novotný-type equation was applied to fit the heat capacities of the ternary systems and yielded satisfactory results by the AAD of 0.2 %, 0.1 %, and 0.1 % for PZ / LiCl / LiBr + AEPD + H2O systems, PZ / LiCl / LiBr + AMPD + H2O systems, and PZ / LiCl / LiBr + TBAE + H2O systems, respectively.
In general, the measured heat capacities provide sufficient accuracy for most engineering design process involving sterically hindered amine systems as the CO2 absorbents.

並列關鍵字

CO2 absorption ； sterically hindered amines ； salt solutions ； heat capacity

參考文獻

Blanchard, L. A.; Gu, Z.; Brennecke, J. F. High-pressure phase behaviour of ionic liquid/CO2 systems. J. Phys. Chem. B 2001, 105, 2437-2444.

Blanchard, L. A.; Hancu, D.; Beckman, E. J.; Brennecke, J. F. Green processing using ionic liquids and CO2. Nature 1999, 399, 28-29.

Bosch, H.; Versteeg, G. F.; Swaaij, W. P. M. v. Kinetics of the reaction of CO2 with the sterically hindered amine 2-amino-2-methylpropanol at 298 K. Chem. Eng. Sci. 1989, 45, 1167-1173.

Bougie, F.; Iliuta, M. C. Sterically hindered amine-based absorbents for the removal of CO2 from gas streams. J. Chem. Eng. Data 2012, 57, 635-669.

Bougie, F.; JulienLauzon-Gauthier; MariaC.Iliuta. Acceleration of the reaction of carbon dioxide into aqueous 2-amino-2-hydroxymethyl-1,3-propanediol solutions by piperazine addition. Chem. Eng. Sci. 2009, 64, 2011-2019.