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Plasma-enabled catalytic dry reforming of CH4into syngas, hydrocarbons and oxygenates: Insight into the active metals of γ-Al2O3supported catalysts
- Source :
- Journal of CO2 Utilization; January 2023, Vol. 67 Issue: 1
- Publication Year :
- 2023
-
Abstract
- Dry reforming of CH4(DRM) using a plasma-enabled catalytic process is an appealing approach for reducing greenhouse gas emissions while producing fuels and chemicals. However, this is a complex process that is influenced by both catalysts and discharge plasmas, and low energy efficiency remains a challenge for this technology. Here, we developed a water-cooled dielectric barrier discharge (DBD) reactor for plasma DRM reactions over supported catalysts (Ni/γ-Al2O3, Ag/γ-Al2O3and Pt/γ-Al2O3) prepared via plasma-modified impregnation. Results show that metal loading on γ-Al2O3enhanced the basic nature of the catalysts and promoted the formation of discharge channels and reactive species. The maximum conversion of CO2(21.4 %) and CH4(27.6 %) was obtained when using Ag/γ-Al2O3. The basic nature of the catalytic materials dominated CO2conversion, whereas the properties of the catalyst and discharge plasma determined CH4conversion. The highest selectivity of hydrogen (∼34.5 %) and carbon-containing gas products (∼81.0 %) were attained when using the noble metal catalysts (Ag/γ-Al2O3and Pt/γ-Al2O3), while the highest total selectivity of liquid products (14.1 %) was achieved in the presence of Ni/γ-Al2O3. Compared with γ-Al2O3, the supported catalysts demonstrated higher stability, especially for Ag/γ-Al2O3and Pt/γ-Al2O3, which also provided higher energy efficiency for gas conversion and product formation.
Details
- Language :
- English
- ISSN :
- 22129820
- Volume :
- 67
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Journal of CO2 Utilization
- Publication Type :
- Periodical
- Accession number :
- ejs61566691
- Full Text :
- https://doi.org/10.1016/j.jcou.2022.102307