Routes to increase the conversion and the energy efficiency in the splitting of CO₂by a dielectric barrier discharge

Abstract

We present here routes to increase the CO 2 conversion into CO using an atmospheric pressure dielectric barrier discharge. The change in conversion as a function of simple plasma parameters, such as power, flow rate, but also frequency, on-and-off pulse of the power, thickness and chemical nature of the dielectric, wall and gas temperature, is described. By means of an in-depth electrical characterization of the discharge (effective plasma voltage, dielectric voltage, plasma current, number and lifetime of the microdischarges), combined with infrared analysis of the walls of the reactor, optical emission spectroscopy for the gas temperature, and mass spectrometry for the CO 2 conversion, we propose a global interpretation for the effect of all the experimental parameters on the conversion and efficiency of the reaction.

Altering Conversion and Product Selectivity of Dry Reforming of Methane in a Dielectric Barrier Discharge by Changing the Dielectric Packing Material

“…Indeed, some important observations can be made when comparing literature, that underline the need for further research. For example, some papers contradict each other with respect to the influence of frequency on CO 2 splitting in a non-packed reactor, reporting either a rise or a drop or no influence of frequency on the results (see details in Table 1) [14][15][16]. Similar discrepancies have been observed for DRM in packed bed DBD plasma reactors.…”

Fundamental Properties and Applications of Dielectric Barrier Discharges in Plasma‐Catalytic Processes at Atmospheric Pressure

“…The production of methanol can also be performed by the hydrogenation of CO 2. This approach is closely related to the plasma-assisted splitting of CO 2 to CO, which has attracted a lot of interest from the scientific community [137][138][139][140]. The generated CO can then be used to produce methanol by established industrial processes [35].…”

Boudouard reaction driven by thermal plasma for efficient CO2 conversion and energy storage

“…Many exploratory studies have been carried out. The most frequently used reactions are CO 2 reforming of CH 4 by catalysis [11][12][13] , and pure CO 2 splitting by a plasma [14][15][16][17] . Key reactions are: (2) For both reactions there are major obstacles to be overcome.…”