Dissociation of Carbon Dioxide Using a Microdischarge Plasma Reactor

2014-04-02
Taylan, Onur
Berberoglu, Halil
This paper reports an experimental study on dissociation of carbon dioxide using a microdischarge plasma reactor at ambient conditions. Carbon dioxide contributes to more than 80% of the greenhouse gas emissions in United States. The microdischarge plasmas can be a very promising method in dissociating gases, including carbon dioxide, due to their lack of need for catalysts, operating at temperatures lower than conventional thermochemical dissociation processes and ease of operation. A microhollow cathode discharge plasma reactor was designed and prototyped for CO2 dissociation. The reactor included metal electrodes that were attached to both sides of a dielectric material with a micro-size through hole. The electrodes and the dielectric material were placed perpendicular to flow direction for dissociation to occur as carbon dioxide passed through the hole. A set of experiments were conducted to investigate the effect of flow rate and applied voltage on the composition of the products, energy conversion efficiency and CO2-to-CO conversion yield of the microdischarge plasma reactor. Temperature of reactants and products were continuously measured; applied voltage was set using a high-voltage power supply; and molar composition of products for each case was analyzed using gas chromatography. Results showed that CO2 dissociation rate, energy conversion efficiency and CO2-to-CO conversion yield increased with applied voltage. Moreover, CO2 dissociation rate and conversion yield decreased while energy conversion efficiency increased with increasing flow rate.
Citation Formats
O. Taylan and H. Berberoglu, “Dissociation of Carbon Dioxide Using a Microdischarge Plasma Reactor,” presented at the Volume 6A: Energy, San Diego, California, Amerika Birleşik Devletleri, 2014, Accessed: 00, 2021. [Online]. Available: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?doi=10.1115/IMECE2013-64632.