Abstract
It was found that strongly adsorbed pyridine on ZSM-5 acid sites was hydrogenated over Pt/H-ZSM-5 (0.5%) and Pt-hybrid (a physically mixed catalyst with weight ratio of Pt/SiO 2 (2.5wt%)/H-ZSM-5=1:4) catalysts to adsorbed piperidine in the presence of gaseous hydrogen at around 473 K by FT-IR measurement, whereas no such phenomena were observed on either H-ZSM-5 or Pt/SiO 2 . The phenomenon revealed the occurrence of hydrogen spillover from Pt site to zeolite acid sites (Bronsted and Lewis). A quantitative description to this reaction was achieved by calculating and measuring zeolite acid amount and hydrogen consumption. In company with this finding, the dehydrogenation of adsorbed piperidine which correlates with reverse hydrogen spillover was also observed on Pt/H-ZSM-5 catalyst in the temperature range of 623∼723 K.
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.
