title: Carbon Dioxide Sequestration by Using a Model Carbonic Anhydrase Complex in Tertiary Amine Medium.
abstract: Globally, the elevation of carbon dioxide (CO2 ) levels due to the anthropogenic effect poses a serious threat to the ecosystem. Hence, it is important to control and/or mitigate the level of CO2 in the atmosphere, which necessitates novel tools. Herein, it is proposed to improve CO2 sequestration by using model complexes based on the enzyme carbonic anhydrase (CA) in aqueous tertiary amine medium. The effect of substituents on the model CA model complexes on CO2 absorption and desorption was determined by using a stopped-flow spectrophotometer to follow pH changes through coupling to pH indicator and a continuous stirred-tank reactor (CSTR). The CO2 hydration rate constants were determined under basic conditions and compound 6, which contained a hydrophilic group, showed the highest absorption or hydration levels of CO2 (2.860×10(3)  L mol(-1)  s(-1) ). In addition, CSTR results for the absorption and desorption of CO2 suggest that simple model CA complexes could be used in post-combustion processing.
authors.affiliation: Green Energy Process Laboratory, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon, 305-343, Republic of Korea), Fax: (+82) 42-860-3134.
authors.forename: Dharmalingam
authors.initials: D
authors.lastname: Sivanesan
authors.affiliation: Green Energy Process Laboratory, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon, 305-343, Republic of Korea), Fax: (+82) 42-860-3134.
authors.forename: Youngju
authors.initials: Y
authors.lastname: Choi
authors.affiliation: Green Energy Process Laboratory, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon, 305-343, Republic of Korea), Fax: (+82) 42-860-3134.
authors.forename: Jiyeon
authors.initials: J
authors.lastname: Lee
authors.affiliation: Green Energy Process Laboratory, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon, 305-343, Republic of Korea), Fax: (+82) 42-860-3134.
authors.forename: Min Hye
authors.initials: MH
authors.lastname: Youn
authors.affiliation: Green Energy Process Laboratory, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon, 305-343, Republic of Korea), Fax: (+82) 42-860-3134.
authors.forename: Ki Tae
authors.initials: KT
authors.lastname: Park
authors.affiliation: Centre for Nanotechnology Research, VIT University, Vellore 632014, Tamil Nadu, India.
authors.forename: Andrew Nirmala
authors.initials: AN
authors.lastname: Grace
authors.affiliation: Green Energy Process Laboratory, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon, 305-343, Republic of Korea), Fax: (+82) 42-860-3134.
authors.forename: Hak-Joo
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Green Energy Process Laboratory, Korea Institute of Energy Research, 102 Gajeong-ro, Yuseong-gu, Daejeon, 305-343, Republic of Korea), Fax: (+82) 42-860-3134. jeongsk@kier.re.kr.
authors.forename: Soon Kwan
authors.initials: SK
authors.lastname: Jeong
mesh_terms: D000588:Amines / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D057965:Carbon Sequestration; D002256:Carbonic Anhydrases / Q000378:metabolism*; D057927:Hydrophobic and Hydrophilic Interactions; D008958:Models, Molecular; D008968:Molecular Conformation
chemical_list: D000588:Amines; D002245:Carbon Dioxide; D002256:Carbonic Anhydrases
keywords: absorption; amines; carbon dioxide sequestration; enzyme models; substituent effects