Abstract
A method is described for experimentally probing the molecular shape-sensitive diffusivity of a molecular species effective during the steady-state process of catalysis in a zeolite. It does not require the use of catalyst samples of differing and known particle (i.e., crystallite) sizes but with otherwise identical properties. It can be carried out on a single catalyst sample. The method makes use of hydrogen-deuterium transfer as the catalytic reaction. Instead of comparing reaction rates on different crystallite sizes, it makes use of altering the magnitude of a pseudo-first-order reaction rate constant to probe for the effect of diffusion inhibition. The method is used here to examine the magnitude of the catalytically effective diffusivity of ortho-xylene is ZSM-5, in comparison to the "uptake diffusivity" derived from sorption measurements.
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.
