Enhancements in mass transfer for carbon capture solvents part I: Homogeneous catalyst

Journal Article · Thu Jun 15 00:00:00 EDT 2017 · International Journal of Greenhouse Gas Control

DOI:https://doi.org/10.1016/j.ijggc.2017.05.019· OSTI ID:1362045

Widger, Leland R. ^[1]; Sarma, Moushumi ^[1]; Bryant, Jonathan J. ^[1]; Mannel, David S. ^[1]; Thompson, Jesse G. ^[1]; Lippert, Cameron A. ^[1]; Liu, Kunlei ^[1]

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1. Univ. of Kentucky, Lexington, KY (United States)

The novel small molecule carbonic anhydrase (CA) mimic [Co^III(Salphen-COO^-)Cl]HNEt₃ (1), was synthesized as an additive for increasing CO₂ absorption rates in amine-based post-combustion carbon capture processes (CCS), and its efficacy was verified. 1 was designed for use in a kinetically slow but thermally stable blended solvent, containing the primary amines 1-amino-2-propanol (A2P) and 2-amino-2-methyl-1-propanol (AMP). Together, the A2P/AMP solvent and 1 reduce the overall energy penalty associated with CO₂ capture from coal-derived flue gas, relative to the baseline solvent MEA. 1 is also effective at increasing absorption kinetics of kinetically fast solvents, such as MEA, which can reduce capital costs by requiring a smaller absorber tower. The transition from catalyst testing under idealized laboratory conditions, to process relevant lab- and bench-scale testing adds many additional variables that are not well understood and rarely discussed. As a result, the stepwise testing of both 1 and the novel A2P/AMP solvent blend is described through a transition process that identifies many of these process and evaluation challenges not often addressed when designing a chemical or catalytic additive for industrial CCS systems, where consideration of solvent chemistry is typically the primary goal.

• Research Organization: Univ. of Kentucky, Lexington, KY (United States). Center for Applied Energy Research
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• Grant/Contract Number: FE0012926; 3048110942
• OSTI ID: 1362045
• Alternate ID(s): OSTI ID: 1550337
• Journal Information: International Journal of Greenhouse Gas Control, Vol. 63, Issue C; ISSN 1750-5836
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
Post-combustion
CO2 capture
Mass transfer
Amine
Catalyst
Additives