(509af) Electrochemical Charge Transport in Ionic Liquids for CO2 Conversion to Peroxydicarbonate Anion Using Superoxide Ion | AIChE

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(509af) Electrochemical Charge Transport in Ionic Liquids for CO2 Conversion to Peroxydicarbonate Anion Using Superoxide Ion

Authors 

Halilu, A. - Presenter, University of Malaya
Kheireddine Aroua, M., Centre for Carbon Dioxide Capture and Utilisation (CCDCU), School of Engineering and Technology, Sunway University, Bandar Sunway, 47500 Petaling Jaya, Malaysia
Hayyan, M., Chemical Engineering Program, Faculty of Engineering and Technology, Muscat University, P.O. Box 550, Muscat, P.C. 130, Oman
Yusoff, R., Universiti Malaya
F. Hizaddin, H., Universiti Malaya
The global rise in CO2 levels have motivated researchers to seek suitable CO2 conversion technologies. Initially, COSMO-RS quantum chemical analysis was used to assess the behavior of CO2 in an ammonium-based ionic liquids (ILs) media. The result shows that the ammonium-based IL can capture CO2 for further utilization. Therefore, superoxide ion (O2•−) was successfully generated in the ILs at ~ −1.0 V vs Ag/Ag Cl. The in-situ O2•− mediated conversion of the CO2 to peroxydicarbonate anion using electrochemical technique at >~ −1.0 V vs Ag/Ag Cl. Then charge transport phenomena was determined for the first time using electrochemical impedance spectroscopy. The results indicate that the charge transport in ILs determines the energy efficiency of the CO2 conversion by O2•−. Overall, the finding provides an understanding of reaction pathways for O2•− mediated CO2 conversion using electrochemical techniques in ionic liquids.

Topics 

Carbon Capture & Storage
Electrochemical Fundamentals
Interfacial Phenomena

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