Open AccessCO2 Absorption Capacity and its Enthalpy of Absorption in Aqueous Blend of MDEA/Piperazine/Arginine
Author(s) -
Ahmed Gomaa Talkhan,
Abdelbaki Benamor,
Mustafa S. Nasser,
Muftah H. ElNaas
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/736/2/022088
Subject(s) - piperazine , solubility , aqueous solution , enthalpy , chemistry , absorption (acoustics) , thermodynamics , vapor pressure , absolute deviation , absorption capacity , analytical chemistry (journal) , chromatography , materials science , organic chemistry , chemical engineering , physics , engineering , composite material , statistics , mathematics
In this work, the solubility data of CO 2 in aqueous blends of N-Methyldiethanolamine, Piperazine and Arginine (MDEA/PZ/ARG) of a total concentration of two moles is presented. CO 2 partial pressure was varied from 9 to 99 kPa while temperature ranged from 293 to 323 K in increment of 10 degrees. The experimental results showed that the solubility of CO 2 decreased with increasing ARG ration in the mixture. These results were modelled using a semi-empirical (SE) vapor liquid equilibrium (VLE) model. The model was found able to adequately represent the experimental data with an average absolute deviation (AAD) less than 3.13 %. Using a truncated form of the semi-empirical model, the heat of CO 2 absorption, ΔH ab , at low pressure was estimated and found to be in the range of 32-66 kJ/mole CO 2 absorbed.