Abstract
Plasma is an efficient method that can activate inert molecules such as methane and carbon dioxide in a mild environment to make them reactive. In this work, we have prepared an AE-NiO/γ-Al2O3 catalyst using an ammonia-evaporation method for plasma promoted dry reforming reaction of CO2 and CH4 at room temperature. According to the characterization data of XRD, H2-TPR, TEM, XPS, etc., the AE-NiO/γ-Al2O3 catalyst has higher dispersion, smaller particle size and stronger metal-support interaction than the catalyst prepared by the traditional impregnation method. In addition, the AE-NiO/γ-Al2O3 catalyst also exhibits higher activity in dry reforming reaction. This work provides a feasible reference experience for the research of plasma promoted dry reforming reaction catalysts at room temperature.
Highlights
Increasing global energy demand and fossil fuel consumption have brought a lot of carbon dioxide (CO2 ) emissions and environmental pollution problems [1]
Many studies have proved that the combination of catalyst and Catalysts 2021, 11, 1433 plasma can significantly promote the dry reforming reaction of CO2 and CH4 at room temperature [25,31,32]
In this work, compared to the traditional impregnation method (TI)-NiO/γ-Al2 O3, the ammonia-evaporation method (AE)-NiO/γAl2 O3 catalyst combined with plasma can better promote the conversion of CO2 and CH4
Summary
Increasing global energy demand and fossil fuel consumption have brought a lot of carbon dioxide (CO2 ) emissions and environmental pollution problems [1]. DBD plasma achieves the reaction enthalpy (∆H) required for DRM through the combination of low temperature and Gibbs energy [22], and can cooperate with the catalyst to promote the progress of CO2 and CH4 reforming reactions [23]. Many studies have shown that the reforming reaction of CO2 and CH4 combined with plasma at room temperature can generate hydrocarbons, oxides and liquid hydrocarbons in addition to syngas [26,27,28,29] The problems such as low conversion rate and complicated products still exist, the addition of plasma provides novel sights to lower the temperature of the methane reforming reaction, which deserves further research. All catalysts were packed around the high-voltage electrode in the middle part of the discharge zone of the reactor in order to obtain the coupling effect of catalyst and plasma [30]
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