title: Evaluation of a carbonic anhydrase mimic for industrial carbon capture.
abstract: Zinc(II) cyclen, a small molecule mimic of the enzyme carbonic anhydrase, was evaluated under rigorous conditions resembling those in an industrial carbon capture process: high pH (>12), nearly saturated salt concentrations (45% K2CO3) and elevated temperatures (100-130 °C). We found that the catalytic activity of zinc cyclen increased with increasing temperature and pH and was retained after exposure to a 45% w/w K2CO3 solution at 130 °C for 6 days. However, high bicarbonate concentrations markedly reduced the activity of the catalyst. Our results establish a benchmark level of stability and provide qualitative insights for the design of improved small-molecule carbon capture catalysts.
authors.affiliation: Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory , 7000 East Avenue, Livermore, California 94550, United States.
authors.forename: William C
authors.initials: WC
authors.lastname: Floyd
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Baker
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Valdez
authors.forename: Joshuah K
authors.initials: JK
authors.lastname: Stolaroff
authors.forename: Jane P
authors.initials: JP
authors.lastname: Bearinger
authors.forename: Joe H
authors.initials: JH
authors.lastname: Satcher
authors.forename: Roger D
authors.initials: RD
authors.lastname: Aines
mesh_terms: D002254:Carbonates / Q000737:chemistry; D002256:Carbonic Anhydrases / Q000737:chemistry*; D002384:Catalysis; D000080027:Cyclams; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D010472:Perchlorates / Q000737:chemistry; D011188:Potassium / Q000737:chemistry; D013696:Temperature; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D002254:Carbonates; D000080027:Cyclams; D006571:Heterocyclic Compounds; D010472:Perchlorates; D017967:Zinc Compounds; C038072:cyclen; C037593:potassium carbonate; D002256:Carbonic Anhydrases; D011188:Potassium