(235b) Plasma and Fluidic Oscillation Assisted Electrolysis of CO2
AIChE Annual Meeting
Monday, October 29, 2018 - 4:03pm to 4:21pm
Whilst single SOCs are easy to operate on a small scale in the laboratory, larger systems have found it difficult to compete with alternative energy technologies on cost, performance and durability. In particular, it is necessary to develop methods for lifetime extension of SOCs, minimisation of losses such as concentration polarisation, and faster chemical activation of CO2, using energy inputs close to the thermodynamic minimum.
We are developing a novel, hybrid, plasma and fluidic oscillation assisted electrolysis system, in which the plasma is used to radically improve the kinetics and energy efficiency of CO2 dissociation. The system is designed to reduce concentration polarisation by disrupting the gas boundary layer using fluidic oscillation and by utilizing ionic wind formed in plasmas (the gas flow generated by movement of ions in the plasma).
Non-thermal plasma catalysis has shown great potential for CO2 reduction in its own right due to the promotion of strongly endothermic reactions with low activation energy, so that little or no excess energy is required from the plasma for activation and thermodynamic efficiencies are high. The challenges are to dynamically control the reaction and to achieve high conversion.
Fluidic oscillation can disrupt boundary layer formation and therefore minimise, or remove completely, the effects of concentration polarisation on cell performance. Fluidic oscillation has never before been coupled to an SOC.
Reactor design and preliminary results will be presented, showing the effect of fluidic oscillation and plasma on CO2 electrolysis.