Influence of calcination temperature of Ni/SiC catalysts in microwave-assisted dry reforming of methane reaction

Dry reforming of methane (DRM) offers a sustainable approach for converting greenhouse gases (CH 4 and CO 2 ) into syngas. In this study, we demonstrated the superior efficacy of microwave-assisted DRM over Ni/SiC catalysts calcined at different temperatures. The strong microwave absorption capability of Ni/SiC facilitated rapid catalyst heating, while microwave irradiation lowered the activation energy of DRM, significantly enhancing the conversions of CH 4 and CO 2 . The optimized 3Ni/SiC-923 K catalyst achieved CH 4 and CO 2 conversions of 67.2% and 81.0%, respectively, at 923 K under microwave-assisted DRM, significantly outperforming the respective conversions of 37.4% and 57.1% in conventional thermal DRM. Comprehensive characterizations via BET, XRD, H 2 -TPR, XPS, and microwave absorption analysis elucidate the structure-performance relationship. This work not only presents highly efficient Ni/SiC catalysts for microwave catalytic DRM but also highlights the importance of calcination temperature in adjusting DRM performance.