Catalyst life of vanadium-containing high silica zeolites having the ZSM-5 structure was greatly affected by an additional metal incorporated into the crystal. Chromium ion was effective to increase the catalyst life, while zirconium ion decreased it significantly. Temperature-programmed desorption spectra of NH3 revealed a correlation between the catalyst life and the number of strong acid sites, suggesting that the additional metal affects the catalyst life by changing the number of strong acid sites.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry