Abstract
Synthetic natural gas, or SNG, can be used as a low-carbon substitute for fossil fuels such as coal, gasoline, and natural gas. SNG can be produced by methanation of CO using an appropriate and efficient catalyst. In this study, a ruthenium-doped fibrous silica-mordenite (Ru-FSMOR) catalyst was prepared by a microemulsion method for CO methanation. X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption-desorption, Fourier transform infrared (FTIR)-KBr, FTIR-pyrrole adsorption, hydrogen temperature-programmed reduction (H2-TPR), and thermogravimetric analysis (TGA) were used to examine the catalytic properties. The Ru-FSMOR catalyst demonstrated substantially improved catalytic capacity at 450 °C, with 84% conversion of CO and 78% CH4 yield compared to other catalysts. In addition, the Ru-FSMOR demonstrated excellent thermal stability, as evidenced by the absence of any deactivation after 100 h. Multiple factors, including high surface area, basicity, and the presence of uniformly distributed Ru, which served as CO and H2 adsorption sites, significantly improve the CO methanation activity. The Ru-FSMOR exhibited optimum metal-support interaction amongst the series of catalysts evaluated, inhibiting crystallite movement and protecting against coke deposits. Additionally, in-situ FTIR spectroscopy revealed that CO and H2 molecules are activated by linear adsorption of CO* as intermediates. These disintegrate into immobilized C*, which undergoes hydrogenation during CO methanation to produce methane.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
