Absorption characteristics of new solvent based on a blend of AMP and 1,8-diamino-p-menthane for CO2 absorption.
Aqueous 1,8-diamino-p-menthane (KIER-C3) and commercially available amine solutions were tested for CO2 absorption. A 2-amino-2-methyl-1-propanol (AMP) solution with an addition of KIER-C3 showed 9.3% and 31.6% higher absorption rate for CO2 than the AMP solution with an addition of monoethanolamine (MEA) and ammonia (NH3), respectively. The reaction rate constant for CO2 absorption by the AMP/KIER-C3 solution was determined by the following equation: k2,AMP/C3 = 7.702 x 10(6) exp (-2248.03/T). A CO2 loading ratio of the AMP/KIER-C3 solution was also 2 and 3.4-times higher than that of the AMP/NH3 solution and the AMP/MEA solution, respectively. Based on the experimental results, KIER-C3 may be used as an excellent additive to increase CO2 absorption capability of AMP.
Department of Environmental Engineering, Chungbuk National University, Cheongju 361-763, Korea.
Sang-Sup
SS
Lee
Seong-Man
SM
Mun
Won-Joon
WJ
Choi
Byoung-Moo
BM
Min
Sang-won
SW
Cho
Kwang-Joong
KJ
Oh
D000042:Absorption; D000641:Ammonia / Q000737:chemistry; D002245:Carbon Dioxide / Q000302:isolation & purification*; D000081005:Cyclohexane Monoterpenes; D003510:Cyclohexanes / Q000737:chemistry*; D003959:Diamines / Q000737:chemistry*; D004058:Diffusion; D019856:Ethanolamine / Q000737:chemistry; D007700:Kinetics; D010313:Partial Pressure; D011412:Propanolamines / Q000737:chemistry*; D012995:Solubility; D012996:Solutions; D012997:Solvents / Q000737:chemistry*; D013696:Temperature
D000081005:Cyclohexane Monoterpenes; D003510:Cyclohexanes; D003959:Diamines; D011412:Propanolamines; D012996:Solutions; D012997:Solvents; D002245:Carbon Dioxide; D019856:Ethanolamine; D000641:Ammonia; C006551:2-amino-2-methyl-1-propanol; C574748:4-(2-aminopropan-2-yl)-1-methylcyclohexan-1-amine