Abstract
The bifunctional catalysts of molybdenum phosphide supported on Hβ zeolite (MoP/Hβ) were prepared using a co-impregnation–temperature-programmed reduction method, and catalytically tested in the hydroisomerization of n-heptane. The catalytic conversion and isomerization selectivity of MoP/Hβ were revealed to be higher than those of the control tungsten phosphide sample WP/Hβ and the HMCM22-supported counterpart MoP/HMCM22. Moreover, doping Cr, Ni, or Ce significantly improved the activity of MoP/Hβ; meanwhile, the Cr-promoted catalyst also gave an enhanced selectivity to isomerization products. The catalysts were characterized by X-ray diffraction, Brunauer–Emmett–Teller analysis, temperature-programmed desorption of NH3, and temperature-programmed reduction of H2. Accordingly, it is suggested that the promoting effect of the secondary metal additive is relative to the reduction of MoPOx species, as well as the pores and acid sites of the β zeolite.
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.
