Review
Chemistry, Multidisciplinary
Eleftheria Sapountzaki, Ulrika Rova, Paul Christakopoulos, Io Antonopoulou
Summary: The urgent need to reduce CO2 emissions has driven the development of CO2 capture and utilization technologies. One application is the transformation of CO2 into storage chemicals, such as formic acid, for clean energy carriers. Conventional methods use chemical catalysts for CO2 conversion to formic acid and subsequent H2 release. However, biocatalysts offer a more specific and energy-efficient alternative. Formate dehydrogenase (FDH) catalyzes CO2 conversion to formate, which can be produced by the biocathode in bioelectrochemical systems and electrochemically regenerated. Several microorganisms possessing formate hydrogenlyase or hydrogen-dependent CO2 reductase complexes can catalyze H2 production from formate. Combining these processes enables a CO2-recycling cycle for H2 production, storage, and release with potentially lower environmental impact than conventional methods.
Article
Engineering, Chemical
Menglei Mao, Feixue Sun, Ruqing Chong, Rui Gao, Qiyong Liao, Zihui Meng, Xinlong Fan, Wenfang Liu
Summary: This study investigated the effects of several cation-containing intercalators on the structure of Ti3C2Tx and its enzymatic CO2 conversion performance. It was found that Ti3C2Tx intercalated with NH4OH/KCl had larger layer spacing and specific surface area, and showed better enhancing effect.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Biotechnology & Applied Microbiology
Jaehyun Cha, Jinhee Lee, Byoung Wook Jeon, Yong Hwan Kim, Inchan Kwon
Summary: This study proposes a CO2 hydrogenation system that utilizes hydrogenase from Ralstonia eutropha H16 (ReSH) and formate dehydrogenase from Methylobacterium extorquens AM1 (MeFDH1) to efficiently convert carbon dioxide in industrial flue gas into formate via a nicotinamide adenine dinucleotide-dependent cascade reaction. The enzyme system is tolerant to inhibitors such as carbon monoxide and oxygen, and it can utilize diverse sources of hydrogen and carbon dioxide.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Engineering, Chemical
Ion Iliuta, Faical Larachi
Summary: This study proposes the conversion of CO2 from the atmosphere into formate via an enzyme-mediated process in fixed-bed microreactors. The enzymatic reduction of CO2 in these reactors allows for higher conversion rates. The study explores different operating conditions and enzyme loadings to optimize the CO2 conversion process.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Chemical
Eleana Harkou, Sanaa Hafeez, George Manos, Achilleas Constantinou
Summary: The study aims to design a numbering-up/scale-out membrane microreactor as a capture system for CO2 removal. While nearly uniform flow distribution was achieved in the CFD models, slightly uneven distribution was observed in the experimental system. By installing inserts with different channel widths, the experimental results were improved compared to the original case.
Article
Chemistry, Multidisciplinary
Ayeshe Moazezbarabadi, Duo Wei, Henrik Junge, Matthias Beller
Summary: By employing amino acids as counter ions and utilizing arginine as catalyst, efficient CO2 capture and conversion to formate were achieved.
Article
Chemistry, Physical
Chae Jeong-Potter, Robert Farrauto
Summary: The use of dual function materials (DFM) for combined direct air capture (DAC) of CO2 followed by methanation has been proven feasible. The DFM allows for capture and conversion of CO2 to occur using a single material and reactor at one temperature, maintaining high CO2 capture capacity and producing methane through multiple cycles. Additionally, cyclic operation with the DFM is possible in the presence of moisture, indicating further potential for use in DAC scenarios.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Multidisciplinary
Luca Piccirilli, Brenda Rabell, Rosa Padilla, Anders Riisager, Shoubhik Das, Martin Nielsen
Summary: High catalytic activities were achieved by using Ru-PNP complexes in ionic liquids for the reversible hydrogenation of CO2 and dehydrogenation of formic acid (FA) under mild conditions without sacrificial additives. The Ru-PNP/IL system showed high conversion rates and space-time yield (STY) for FA, with the potential to be used as a FA/CO2 battery, H2 releaser, and hydrogenative CO2 converter.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Eric Schuler, Marilena Demetriou, N. Raveendran Shiju, Gert-Jan M. Gruter
Summary: Developing carbon capture technology is crucial for reducing CO2 emissions and achieving circular economy goals. Electrochemical reduction of CO2 to produce formic acid derivatives for oxalic acid production is a promising pathway for material production.
Article
Chemistry, Multidisciplinary
Daniel Moreno, Ayokunle Omosebi, Byoung Wook Jeon, Keemia Abad, Yong Hwan Kim, Jesse Thompson, Kunlei Liu
Summary: This study utilizes an engineered enzymatic catalyst in a batch reactor to convert CO2 into formic acid (as formate). By adjusting the operating voltage, implementing an O2 scavenger, and controlling system pH, both formate production and Coulombic efficiency can be maximized. The peak formate production and efficiency achieved in long-term experiments were 225 mM and 91%, respectively, showing the potential for effective CO2 conversion to formate.
JOURNAL OF CO2 UTILIZATION
(2023)
Review
Chemistry, Multidisciplinary
Sarah Bierbaumer, Maren Nattermann, Luca Schulz, Reinhard Zschoche, Tobias J. Erb, Christoph K. Winkler, Matthias Tinzl, Silvia M. Glueck
Summary: Enzymatic carbon dioxide fixation is important for converting inorganic carbon from the atmosphere into organic biomass. However, the thermodynamics and utilization of CO2 make it challenging for biotechnological applications. This review provides an overview of natural CO2-fixing enzymes, discusses their applications, and suggests strategies for improving efficiency. It also explores the potential of using reduced CO2 derivates and offers a techno-economic perspective on reducing CO2 emissions.
Article
Chemistry, Multidisciplinary
Aditya Prajapati, Meenesh R. Singh
Summary: Most CO2 extraction techniques are energy-intensive, but electrodialysis of seawater provides an efficient method to capture CO2. The presence of dominant anions such as Cl- and SO42- influences the CO2 capture during electrodialysis. By controlling the residence time, CO2 can be continuously and preferentially captured.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Kaiqi Xu, Athanasios Chatzitakis, Paul Hoff Backe, Qiushi Ruan, Junwang Tang, Frode Rise, Magnar Bjoras, Truls Norby
Summary: This study achieved stable and efficient reduction of CO2 to formate in a bio-hybrid PEC cell using a novel cathode and efficient regeneration mechanism, approaching the efficiency of natural photosynthesis.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Fabian M. Schwarz, Jimyung Moon, Florian Oswald, Volker Mueller
Summary: Hydrogen is a promising fuel for a carbon-neutral economy, but the challenge lies in storing and transporting the highly explosive gas safely. Researchers have discovered a bio-based system using a specific biocatalyst that can convert hydrogen and CO2 into formic acid, a versatile compound. The process has been successfully demonstrated in a bioreactor, with the ability to continually produce and oxidize formic acid over a period of two weeks. Unwanted side-products have been eliminated through metabolic engineering. This system shows potential as a future biobattery for reversible electron storage.
Article
Chemistry, Physical
Yuta Kaneko, Klaus S. Lackner
Summary: This paper investigates the moisture-controlled sorption of CO2 in strong-base anion exchange materials and derives an analytic form for an isotherm equation using a bottom-up approach. The isotherm theory for an alkali liquid is generalized to a strong-base anion exchange material and the final isotherm formula is validated with experimental data. The study shows that the moisture level significantly affects the K-eq(AEM)eff value of the sorbent.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)