混合醇胺(立體障礙醇胺IPAE， AMP + 多元胺EDA， MAPA， DETA)水溶液之比熱量測研究

Molar heat capacity measurements for aqueous ternary mixtures containing sterically hindered amines (IPAE and AMP) and polyamines (EDA, MAPA and DETA)

安芮娜(Regina V. Entrolizo)

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/cycu201500983

摘要

混合胺類是近期值得探討的研究項目，因為它有著助於二氧化碳捕集的特性。然而在吸收二氧化碳中的熱物理性質，摩爾比熱在CO2捕獲是一個重要的地位。本研究量測所探討系統為立體障礙胺(sterically hindered) amines−2-isopropylaminoethanol (IPAE)，2-amino-2-methyl-1-propanol (AMP)，多元胺(polyamines)為 ethylenediamine (EDA)，3-methylaminopropylamine (MAPA) ， diethylenetriamine (DETA)。
測量時，混合胺類是在濃度為30 wt％和40 wt％和溫度範圍:303.15−353.15 K。實驗是在一大氣壓下使用示差掃描熱量計（differential scanning calorimeter, DSC）來收集數據。測定雙成分系統(IPAE/H2O)溶液濃度範圍為xamine = 0.1−0.9；本研究所量測之純物質摩爾比熱，所應用到的方程式以溫度和胺濃度組成，雙成分系統使用Redlich-Kister equation 做計算，三成分系統則是使用modified Söhnel and Novotný equation 做計算。
計算摩爾熱容量結果與實驗數據顯示，在純IPAE中有0.13 ％的平均絕對偏差(AAD)，而雙成分系統平均絕對偏差為0.2 ％，三成分系統平均絕對偏差為 0.1 %，本研究所使用之關係式皆能得此實驗值和回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，設計氣提塔、熱交換器時的參考。

關鍵字

比熱量測 ； 2-isopropylaminoethanol ； 2-amino-2-methyl-1-propanol ； polyamine ； Redlich-Kister equation ； Sohnel and Novotny equation

並列摘要

Blended amines have continuously shown great interest for researchers because of combined characteristics that are expected to contribute to more efficient CO2 capture. Aside from absorption performances, thermophysical properties such as heat capacity are relevant in the assessment of viable CO2 capture absorbents. This work focuses on heat capacity measurements of ternary systems containing sterically hindered amines−2-isopropylaminoethanol (IPAE) and 2-amino-2-methyl-1-propanol (AMP)−and polyamines. The polyamines used are ethylenediamine (EDA), 3-methylaminopropylamine (MAPA) and diethylenetriamine (DETA).
Measurements were performed at total of 30 wt% and 40 wt% amine concentrations and temperature range of 303.15 to 353.15 K. Data gathering was conducted at atmospheric pressure using a differential scanning calorimeter (DSC). In addition to this, the heat capacities of aqueous IPAE solutions over the entire range of compositions were also determined. The obtained experimental heat capacity data were represented as a function of temperature and amine concentration using a modified Söhnel and Novotný equation and a Redlich-Kister expansion for the aqueous ternaries and aqueous binary solutions, respectively.
Calculated molar heat capacity results show good agreement with the experimental data at average absolute deviation (AAD) values of 0.13 % for the pure IPAE. Whereas an overall AAD of 0.2 % and 0.1 % are obtained for the aqueous binary and ternary systems, respectively, suggesting that the applied models are satisfactory. Data gathered in this study can be used in absorption process simulations for the design of heating load of processes and equipment that utilize such systems.

並列關鍵字

Molar heat capacity ； 2-isopropylaminoethanol ； 2-amino-2-methyl-1-propanol ； polyamine ； Redlich-Kister equation ； Sohnel and Novotny equation

參考文獻

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