Abstract
AbstractBACKGROUNDThe valorization of CO2 into added‐value products appears to be a promising strategy for reducing CO2 emissions. Dimethyl carbonate (DMC) is an environmentally friendly valuable product, with multiple applications, suggested as a potential gasoline additive. However, DMC has traditionally been produced from hazardous phosgene and CO routes, which encourages the interest in developing new processes. The purpose of this work is to study the influence of the membrane in a filter‐press electrochemical cell for the valorization of CO2 by the electrosynthesis of DMC from methanol in the presence of the ionic liquid [bmim][Br] and CH3OK and avoiding the addition of carcinogens.RESULTSThe performance of the process has been studied using six different anion exchange membranes in comparison with an undivided configuration and our previous study using a cationic exchange membrane. A significant increase in the initial reaction rate is achieved when no membrane is employed. Regardless of which membrane is used, an additional resistance seems to be introduced. A final concentration of 85 mmol L−1 was obtained up to 48 h without membrane, which is a 6‐fold increase over our previous work.CONCLUSIONSAlthough better results were obtained when no membrane was used, study of the divided cell has provided experimental evidence that can serve as a reference for the evaluation of future improvements in this electrosynthesis. © 2014 Society of Chemical Industry
Highlights
Different strategies for reducing carbon dioxide emissions and mitigating climate change are being developed
CONCLUSIONS: better results were obtained when no membrane was used, the study of divided cell has provided experimental evidence that can serve as a reference for the evaluation of future improvements in this electrosynthesis
The aim of this work is to explore the influence of the membrane on the direct electrosynthesis of Dimethyl carbonate (DMC) from methanol and CO2 in the presence of the ionic liquid [bmim][Br] and CH3OK in a filter press electrochemical cell
Summary
Different strategies for reducing carbon dioxide emissions and mitigating climate change are being developed. Dimethyl carbonate (DMC) appears as an environmentally friendly valuable chemical of great interest due to its versatile chemical reactivity and unique physical properties[5]. DMC is used as an alkylating agent, as an alternative to conventional solvents and electrolyte solvent for lithium ion batteries[7,8]. It is an important building block in the production of higher carbonates, carbamates and isocyantes[9]. Dimethyl carbonate (DMC) is an environmentally friendly valuable product, with multiple applications, suggested as a potential gasoline additive.
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