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Journal of Applied Sciences
  Year: 2014 | Volume: 14 | Issue: 23 | Page No.: 3228-3234
DOI: 10.3923/jas.2014.3228.3234
Absorption of Green House Gas (CO2) and Physical Properties of Aqueous Solutions of 2-Amino-2-Hydroxymethyl-1, 3-Propanediol and Di-Ethanolamine (AHPD+DEA) at Elevated Pressures
Ghulam Murshid, Azmi Mohd Shariff, Muhammad Azmi Bustam and Sami Ullah

Abstract:
Removal or capture of CO2 from various industrial streams using amine based absorption process is the most widely used process in industry around the world. This is due to flexibility and applicability of the process for different applications. In chemical absorption, the absorbed substances undergo chemical reactions with the solvents which help to achieve high loadings but on the other hand leading to excessive energy consumption to recover solvents. Therefore, any alternative absorbent that could facilitate the separation of CO2 from gas mixtures from various industrial streams, e.g., natural gas, flue gas from power plant, with high rate of reaction, high CO2 absorption, cyclic capacity and negligible volatility, making them be highly desired. For this purpose, a new class of amines which is called Sterically Hindered Amines (SHA) is experimentally investigated in blend with DEA in order to combine the desired properties of two solvents in one hybrid mixture. Due to the cyclic structure of 2-amino-2-hydroxymethyl-1,3-propanediol (AHPD), which is one of the stericlally hindered amines, offers high rate of reaction and higher CO2 absorption which makes this solvent a potential replacement of conventional amines. Therefore, the solubility of carbon dioxide (CO2) in aqueous blends of 2-amino-2-hydroxymethyl-1,3-propanediol (AHPD) and Di-ethanolamine (DEA), (DEA + AHPD) was measured at elevated pressure up to 1600 kPa for various hybrid mixtures concentrations. It was found that the addition of AHPD to the aqueous solutions of DEA gives significantly higher CO2 loadings at higher pressures. The influence of pressure on solubility is found to be positive. However, solubility decreases with increase of temperature. Transport properties of aqueous blends of DEA+AHPD were also measured and correlated over the wide range of temperature. The total solvent concentration was kept at 30 wt% as per industrial interest. Density and viscosity values show the decreasing trend by increasing the temperature. However, viscosity of aqueous blends increase with the addition of AHPD concentration in the aqueous solutions.
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How to cite this article:

Ghulam Murshid, Azmi Mohd Shariff, Muhammad Azmi Bustam and Sami Ullah, 2014. Absorption of Green House Gas (CO2) and Physical Properties of Aqueous Solutions of 2-Amino-2-Hydroxymethyl-1, 3-Propanediol and Di-Ethanolamine (AHPD+DEA) at Elevated Pressures. Journal of Applied Sciences, 14: 3228-3234.

DOI: 10.3923/jas.2014.3228.3234

URL: https://scialert.net/abstract/?doi=jas.2014.3228.3234

 
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