Open AccessPotential of 2-Amino-2-Methyl-1-Propanol Solution as Absorbent for CO2 Absorption from Biogas
Author(s) -
Viga Rajiman,
Hairul Nazirah Abdul Halim,
Azmi Mohd Shariff,
Usman Ali,
M I H M Dzahir
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/765/1/012054
Subject(s) - biogas , chemistry , solvent , amine gas treating , methane , volumetric flow rate , absorption (acoustics) , carbon dioxide , chemical engineering , nuclear chemistry , waste management , materials science , organic chemistry , physics , quantum mechanics , engineering , composite material
Biogas is a source of clean energy that mainly consists of methane (CH 4 ) and carbon dioxide (CO 2 ). However, the presence of CO 2 in biogas limits the heating value of the gas. Thus, biogas upgrading is a crucial process for reducing the CO 2 content in raw biogas for purified biomethane production. Chemical absorption is a matured technology for CO 2 removal process. The selection of chemical solvent with desirable characteristics is a substantial consideration for the effectiveness of the process. In this work, a potential solvent, 2-amino-2-methyl-1-propanol (AMP) was tested for the removal of CO 2 from simulated biogas. The absorption process was conducted at different gas flow rates (22.1 kmol/m 2 .hr and 26.5 kmol/m 2 .hr) in a packed column at an operating pressure of 2 bars. The performance was evaluated in terms of percentage of CO 2 removal along the column. It was found that the CO 2 removal performance decreased by about 15 % at higher gas flow rates. Besides, the absorption efficiency of AMP was also compared with a well-established solvent, monoethanolamine (MEA). The experiment substantiated that 30 wt.% MEA effectively captured CO 2 with 100 % removal as compared to 30 wt.% and 40 wt.% AMP with only 69 % and 87 % removal. In order to achieve high reaction rate for efficient CO 2 removal, the addition of activator to form a blended amine solution with AMP was suggested to accelerate the CO 2 absorption performance.