| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 686837 | Chemical Engineering and Processing: Process Intensification | 2014 | 9 Pages |
•An intensified CO2 capture and electro-conversion process was proposed and analyzed.•An Ionic Liquid (IL) was synthesized and used as absorption media and electrolyte.•The IL gives high ionic conductivity and acts as charged intermediate stabilizer.•Specific electrochemical energy consumption was estimated to be 8.683 kWh kg (CO2)−1.
An intensified process for carbon dioxide capture and conversion is proposed and analyzed, considering an electrochemical parallel plate reactor which processes a CO2-charged stream from an absorption unit at 40 °C and atmospheric pressure and where the target product of the conversion is methanol.The task-specific ionic liquid 1-(3-aminopropyl)-3-methylimidazolium bromide was selected, synthesized and characterized. This ionic liquid has shown a good absorption capacity, high ionic conductivity, high chemical–electrochemical stability and acts as a charged intermediate (CO2*−) stabilizer, enabling the electrochemical reduction of absorbed CO2.The electrical energy in the electrochemical reactor was estimated to be 8.683 kWh kg (CO2)−1 or 115.16 g (CO2) kWh−1, too high to ensure the environmental sustainability of the process. A low concentration of carbon dioxide in the liquid phase, at ambient conditions, implies the need for a high electrode area for the process and is a major hindrance to improving the economy of the process.
