2021
DOI: 10.1021/acs.iecr.1c03592
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Electroreduction of CO2/CO to C2 Products: Process Modeling, Downstream Separation, System Integration, and Economic Analysis

Abstract: Direct electrochemical reduction of CO 2 to C 2 products such as ethylene is more efficient in alkaline media, but it suffers from parasitic loss of reactants due to (bi)carbonate formation. A two-step process where the CO 2 is first electrochemically reduced to CO and subsequently converted to desired C 2 products has the potential to overcome the limitations posed by direct CO 2 electroreduction… Show more

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Cited by 57 publications
(72 citation statements)
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“… 4 6 CO 2 can be electrochemically converted to a number of valuable materials and fuels, spanning polymers, acids, alcohols, and hydrocarbons. 3 , 7 Valuable CO 2 electroreduction products include formic and oxalic acid, which are the simplest forms of monocarboxylic and dicarboxylic acids, respectively. 8 , 9 The CO 2 electoreduction to these acids require only two moles of electrons per mole of product and have a high market price.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“… 4 6 CO 2 can be electrochemically converted to a number of valuable materials and fuels, spanning polymers, acids, alcohols, and hydrocarbons. 3 , 7 Valuable CO 2 electroreduction products include formic and oxalic acid, which are the simplest forms of monocarboxylic and dicarboxylic acids, respectively. 8 , 9 The CO 2 electoreduction to these acids require only two moles of electrons per mole of product and have a high market price.…”
Section: Introductionmentioning
confidence: 99%
“… 8 , 9 The CO 2 electoreduction to these acids require only two moles of electrons per mole of product and have a high market price. 7 , 10 Formic acid can be produced with high Faraday efficiencies (>95%) and current densities (150 mA cm –2 ) using gas diffusion electrodes. 10 In 2018, formic acid was reported to have a total market value of $756.5 MM, with a market price of approximately $400/tonne.…”
Section: Introductionmentioning
confidence: 99%
“… 4 6 Moreover, the two-electron reduction products carbon monoxide and formate/formic acid are of interest as well since there are several sustainable use cases for both. The case for carbon monoxide involves the further processing to produce other chemicals, 3 , 7 , 8 and the case for formate/formic acid is based on the current market for the chemical and future ideas for a bioeconomy or as a liquid reservoir of H 2 or CO. 9 11 With these multifaceted applications for the CO 2 RR, understanding the trends in the electrocatalytic performance of different electrode materials toward the CO 2 RR is crucial for catalyst development and optimization for the reaction. 1 , 12 Initial experimental studies by Hori et al mapped the activity and selectivity of many monometallic electrocatalysts for the CO 2 RR.…”
Section: Introductionmentioning
confidence: 99%
“…The renewable energy‐powered CO 2 electroreduction to multi‐carbon products is a promising approach to valorizing CO 2 to generate fuels and platform chemicals [1,2] . There is a lot of progress in the selective electrochemical reduction of CO 2 to products like [3,4] carbon monoxide, [5,6] methane, [7] and ethylene, [8] with a Faradaic efficiency (FE) value greater than 70 %.…”
Section: Introductionmentioning
confidence: 99%
“…The renewable energy-powered CO 2 electroreduction to multicarbon products is a promising approach to valorizing CO 2 to generate fuels and platform chemicals. [1,2] There is a lot of progress in the selective electrochemical reduction of CO 2 to products like [3,4] carbon monoxide, [5,6] methane, [7] and ethylene, [8] with a Faradaic efficiency (FE) value greater than 70 %. However, there are a handful of reports on selective electrochemical CO 2 reduction to C 2 + oxygenates because of the complexity in their post CÀ C coupling reaction pathways resulting from the competition between multi-carbon gaseous and liquid product formation.…”
Section: Introductionmentioning
confidence: 99%