A Combined Chemical-Electrochemical Process to Capture CO 2 and Produce Hydrogen and Electricity

Nabila Shamim, Shuza Binzaid, Jorge Federico Gabitto and John Okyere Attia
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Nabila Shamim: Department of Chemical Engineering, Prairie View A&M University, Prairie View, TX 77446, USA
Shuza Binzaid: Department of Electrical & Computer Engineering, Prairie View A&M University, Prairie View, TX 77446, USA
Jorge Federico Gabitto: Department of Chemical Engineering, Prairie View A&M University, Prairie View, TX 77446, USA
John Okyere Attia: Department of Electrical & Computer Engineering, Prairie View A&M University, Prairie View, TX 77446, USA

Energies, 2021, vol. 14, issue 18, 1-18

Abstract: Several carbon sequestration technologies have been proposed to utilize carbon dioxide (CO 2 ) to produce energy and chemical compounds. However, feasible technologies have not been adopted due to the low efficiency conversion rate and high-energy requirements. Process intensification increases the process productivity and efficiency by combining chemical reactions and separation operations. In this work, we present a model of a chemical-electrochemical cyclical process that can capture carbon dioxide as a bicarbonate salt. The proposed process also produces hydrogen and electrical energy. Carbon capture is enhanced by the reaction at the cathode that displaces the equilibrium into bicarbonate production. Literature data show that the cyclic process can produce stable operation for long times by preserving ionic balance using a suitable ionic membrane that regulates ionic flows between the two half-cells. Numerical simulations have validated the proof of concept. The proposed process could serve as a novel CO 2 sequestration technology while producing electrical energy and hydrogen.

Keywords: CO 2 absorption; process intensification; hydrogen; electrochemical cell (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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