Low-Energy Electrochemical Carbon Dioxide Capture Based on a Biological Redox Proton Carrier


Summary Carbon capture and storage, in which CO2 is selectively removed and sequestrated from flue gas, is a promising strategy to mitigate CO2 emissions and global warming. Conventionally, CO2 capture involves an energy-consuming absorbent regeneration step by thermal decomposition (2.0 – 4.0 GJ ton − 1 CO2), which accounts for the majority (60 % – 70 %) of the total cost. Here, we propose an alternative electrochemical cycle to capture CO2 in an aqueous alkaline solution, facilitated by the pH swing effect from a proton-coupled electron transfer redox reaction of a biological proton carrier, riboflavin 5 ′-monophosphate sodium salt hydrate (FMN/FMNH2). Under lab conditions, an electrolysis cell implementing the FMN proton carrier demonstrates a high energy efficiency, with only 9.8 kJ mol − 1 CO2 captured, which is much lower than traditional approaches using a monoethanolamine absorbent (2.0 – 4.0 GJ ton − 1 CO2, 88 – 176 kJ mol − 1 CO2). Thus, this system may contribute toward lowering the cost of CO2 capture.

Concepts Powered ByUnsilo

Proton Carrier Search on this concept
Proton Search on this concept
CO2 Capture Search on this concept
Carbon Search on this concept
Riboflavin Search on this concept
Cell Search on this concept
Mitigate CO2 Emissions Search on this concept
Cost Search on this concept
Redox Search on this concept
Aqueous Alkaline Solution Search on this concept

Similar Papers

Coronavirus Pandemic

You can also read COVID related content on R COVID-19

R ProductsCOVID-19


Creating the world’s largest AI-driven & human-curated collection of research, news, expert recommendations and educational resources on COVID-19

COVID-19 Dashboard