Bench-scale demonstration of CO2 capture with an electrochemically driven proton concentration process
Open Access
- 29 April 2020
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in RSC Advances
- Vol. 10 (29), 16832-16843
- https://doi.org/10.1039/d0ra02450c
Abstract
A thorough experimental investigation of a bench-scale apparatus of the proton concentration process with two symmetrical MnO2 electrodes is presented, with the aim of continuous desorption of CO2 from a K2CO3 solution. The electrodes were fabricated through cathodic deposition, and their chemical states, morphology, and microstructural architecture were characterized with X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Successful formation of MnO2 film was confirmed by XPS analysis, and the SEM images showed a uniform distribution of the film across the carbon substrate surface and along the strand, with an average thickness of ∼500 nm, thus making proton ion diffusion possible. Continuous and efficient desorption of CO2 from a K2CO3 solution was obtained when electrodeposited MnO2 electrodes were used in a flow-based proton concentration process. The amount of CO2 desorbed per area of the electrode was 12-fold higher than that of a similar system. The electrochemical nature of the proton concentration process offers substantial practical advantages for the future, especially if electricity can be sustainably produced from renewable sources.Funding Information
- Exxon Mobil Corporation
This publication has 48 references indexed in Scilit:
- A Review of CO2 Capture by Absorption and AdsorptionAerosol and Air Quality Research, 2012
- A hierarchical nanostructure consisting of amorphous MnO2, Mn3O4 nanocrystallites, and single-crystalline MnOOH nanowires for supercapacitorsJournal of Power Sources, 2011
- CO2separation using bipolar membrane electrodialysisEnergy & Environmental Science, 2010
- Boehmite nanopetals self assembled to form rosette-like nanostructuresMaterials Letters, 2008
- Experimental Investigation on CO2 Post−Combustion Capture by Indirect Thermal Swing Adsorption Using 13X and 5A ZeolitesIndustrial & Engineering Chemistry Research, 2007
- Investigation of Pseudocapacitive Charge-Storage Reaction of MnO[sub 2]⋅nH[sub 2]O Supercapacitors in Aqueous ElectrolytesJournal of the Electrochemical Society, 2006
- Charge Storage Mechanism of MnO2 Electrode Used in Aqueous Electrochemical CapacitorChemistry of Materials, 2004
- Electrochemical Separation and Concentration of <1% Carbon Dioxide from NitrogenJournal of the Electrochemical Society, 2003
- Cathodic Behavior of Alkali Manganese Oxides from PermanganateJournal of the Electrochemical Society, 1997
- Effects of electrochemically incorporated bismuth on the discharge and recharge of electrodeposited manganese dioxide films in 9m aqueous KOHJournal of Applied Electrochemistry, 1995