Abstract
The reactivity of methane with ceria, doped with either 10 cation% Gd, 1.4 cation% Nb, 5 cation% Nb, or undoped has been investigated using micro-reactor techniques. Temperature programmed reduction (TPR) was carried out in a mixture of 5% hydrogen in argon and both temperature programmed reaction (TPRx) and isothermal reaction at 900°C were carried out in 5% methane in argon. Oxidation of deposited carbon was investigated by temperature programmed oxidation (TPO) in 10% oxygen in helium. All cerias had good catalytic activity for conversion of methane to hydrogen and carbon monoxide until oxygen exhaustion. Exposure to methane resulted in only small amounts of carbon deposition. Doping was found to have a relatively minor effect on reaction with methane, but Nb-doped ceria was capable of oxidizing carbon deposits at lower temperatures than undoped or Gd-doped ceria.
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.
