Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 59, Issue 47, Pages 20929-20942Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.0c02358
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Funding
- Spanish Ministry of Economy and Competitiveness (MINECO) under Ramon y Cajal program [RYC-2015-17080]
- Science and Technology Development Fund (STDF) of Egypt [11872]
- Oil and Green Chemistry research center
- Enhanced Oil Recovery Lab, Suez University, Egypt
- STDF (Science and Technology Development Fund) [12395]
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In this study, a model was built to investigate the role of Cu2O-/ZnO-based gas diffusion electrodes in enhancing the reduction of carbon dioxide into methanol inside an electrochemical cell. The model was simulated using COMSOL Multiphysics software and validated using experimental results. It showed reasonable agreement with an average error of 6%. The model demonstrated the dependence of the methanol production rate and faradic efficiency on process key variables: current density (j = 5-10 mA cm(-2)), gas flow rate (Q(g)/A = 10-20 mL min(-1) cm(-2)), electrolyte flow rate, and CO2 gas feed concentration. The results showed a maximum methanol production rate of 50 mu mol s(-1) and faradic efficiency of 56% at -1.38 V vs Ag/AgCl. From the economic point of view, it is recommended to use a gas stream of 90% or slightly lower CO2 concentration and an electrolyte flow rate as low as 2 mL min(-1) cm(-2).
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