Abstract
ESG evaluation has become crucial in addressing global warming caused by increasing emissions of greenhouse gases. Biogas plants have gained popularity as they capture methane from organic waste and utilize it as energy. However, a significant amount of biogas remains unused, contributing to greenhouse gas emissions. To tackle this issue, a study was conducted on generating synthesis gas from biogas and utilizing the dry reforming of methane (DRM) reaction. Ni-based catalysts, commonly used for CO2 methanation, were found to have limitations in low-temperature activity and sinterability. The study examined the catalytic efficiency with different methane-to-carbon dioxide ratios found in biogas facilities. Fe-Ni-CeO2-Al2O3 catalyst exhibited stable operation over 50 hours, although its conversion rate was slightly lower compared to Ni-CeO2-Al2O3. However, higher methane-to-carbon dioxide ratios led to decreased H2 yield due to reduced carbon deposition resistance, as observed in SEM-EDS analysis. To prevent this, additional CO2 injection should be implemented when CH4 inflow increases. Therefore, the optimal conditions for implementing DRM in biogas facilities involve using Fe-Ni-CeO2-Al2O3 catalyst and injecting methane and carbon dioxide at a maximum ratio of 1.2 to avoid carbon deposition and sintering.
