Selection of solvents for integrated CO2 absorption and electrochemical reduction systems

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL AIChE Journal Pub Date : 2025-01-10 DOI:10.1002/aic.18734

Fragkiskos Tzirakis, Luis A. Diaz, Ioannis Chararas, Daniel Molina Montes de Oca, Zeyu Zhao, Panos Seferlis, Ioannis Tsivintzelis, Athanasios I. Papadopoulos

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引用次数: 0

Abstract

Solvent-based electrochemical CO₂ reduction (CO₂R) enables the production of chemicals or fuels using CO₂ from a preceding absorption process. Employing previously tested CO₂ capture solvents does not ensure their suitability for either CO₂R or integrated CO₂ absorption-reduction. We propose solvent selection criteria that include the CO₂ solubility, kinetic constant, ionic conductivity, concentration of the bicarbonate, carbamate, and solvent cation in the CO₂-loaded solution, and sustainability indicators. They are implemented for solvent selection (a) from novel, aqueous mixtures of N-methylcyclohexylamine (MCA) with piperazine (PZ), 2-amino-2-methyl-1-propanol (AMP), potassium hydroxide (KOH), and potassium chloride (KCl) and (b) from aqueous monoethanolamine (MEA), AMP, KOH, MCA, and PZ solutions. Versions of a modified Kent-Eisenberg model for strong bases, carbamate, and non-carbamate-forming amine solutions are developed and parameterized through experimental equilibrium measurements. CO₂R experimental results are presented for solutions of KOH and MCA + KOH, as these indicate desired trade-offs for CO₂ absorption and reduction.

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.