Abstract
The composition (CuO/ZnO/Al 2O 3 = 30/60/10) of a commercial catalyst G66B was used as a reference for designing CuO/ZnO/CeO 2/ZrO 2/Al 2O 3 catalysts for the oxidative (or combined) steam reforming of methanol (OSRM). The effects of Al 2O 3, CeO 2 and ZrO 2 on the OSRM reaction were clearly identified. CeO 2, ZrO 2 and Al 2O 3 all promoted the dispersions of CuO and ZnO in CuO/ZnO/CeO 2/ZrO 2/Al 2O 3 catalysts. Aluminum oxide lowered the reducibility of the catalyst, and weakened the OSRM reaction. Cerium oxide increased the reducibility of the catalyst, but weakened the reaction. Zirconium oxide improved the reducibility of the catalyst, and promoted the reaction. A lower CuO/ZnO ratio of the catalyst was associated with greater promotion of ZrO 2. The critical CuO/ZnO ratio for the promotion of ZrO 2 was approximately 0.75–0.8. Introducing of ZrO 2 into CuO/ZnO/Al 2O 3 also improved the stability of the catalyst. Although Al 2O 3 inhibited the OSRM reaction, a certain amount of it was required to ensure the stability and the mechanical strength of the catalysts.
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.
