Alumina and quartz as dielectrics in a dielectric barrier discharges DBD system for CO2 hydrogenation

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Mora, E.Y.^1 ; Sarmiento, A.^1 ; Vera, E.^1

Universidad Pedagógica y Tecnológica de Colombia (UPTC), Tunja, Colombia^1

关键词: CO2 hydrogenation;    Dielectric barrier discharges;    Electrical frequency;    Electrical power;    Mixture compositions;    Operation frequency;    Relative dielectric permittivity;    Work condition;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012020/pdf
DOI  :  10.1088/1742-6596/687/1/012020

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this work was studied the CO2carbon dioxide treatment, which is a pollutant gas and the main cause of global warming. For this aim, plasma was generated, through dielectric barrier discharges DBD, using hydrogen H2together with the CO2as reaction gases. There were used as dielectrics, alumina and quartz tubes of identical geometry. It was studied the CO2conversion in function of mixture composition CO2+H2, of the electrical power and the operation frequency, for three different gas flows. In all cases it was achieved better conversion levels with the alumina; this is because the alumina has a relative dielectric permittivity coefficient higher than the quartz. As products of CO2conversion in the chemical reactions, water H2O and methane gas CH4were identified. The CO2conversion percentage to fixed work conditions was higher with the decrease the quantity of this gas in the mixture, with increase the active electrical power, and with decrease the operation electrical frequency.