An experimental based optimization of a novel water lean amine solvent for post combustion CO2 capture process

Title
An experimental based optimization of a novel water lean amine solvent for post combustion CO2 capture process
Authors
이현주이웅나종걸안병성이상득이희원김정남황준혁김훈식
Keywords
CO2 capture; Water-lean amine solvent; Gaussian process Bayesian optimization; Pilot-scale testing
Issue Date
2019-08
Publisher
Applied energy
Citation
VOL 248-184
Abstract
The development of new amine solvents without the major drawbacks of conventional amines is crucial to industrial applications of CO2 capture. This paper presents a water-lean CO2 capture solvent having a low regeneration energy and low degradation. The water-lean solvent, K2Sol, is a sterically hindered diamine; because of the hindered amine site, K2Sol easily forms bicarbonate, resulting in a high absorption capacity. The minimum solvent regeneration energy is obtained using Gaussian process Bayesian optimization (GPBO) and bench-scale pilot plant experiments. GPBO finds the optimal solution using the input and output relationship of experiments; thus, expensive first-principle model construction can be avoided. According to the pilot plant experiment, the optimal regeneration energies of monoethanolamine (MEA) and K2Sol are 4.3 and 2.8  GJ/t CO2, respectively, indicating that K2Sol requires only 65% of the regeneration energy of MEA. Fewer than 30 experiments are required to find the optimal pilot plant operation for both the MEA and K2Sol experiments. We also describe the superior properties of K2Sol in terms of the CO2 loading, cyclic capacity, regeneration temperature, and degradation.
URI
http://pubs.kist.re.kr/handle/201004/69438
ISSN
0306-2619
Appears in Collections:
KIST Publication > Article
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