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Measurements and distinguishment of mass transfer processes in fluid catalytic cracking catalyst particles by uptake and frequency response methods

Paper ID Volume ID Publish Year Pages File Format Full-Text
54053 46994 2015 8 PDF Available
Title
Measurements and distinguishment of mass transfer processes in fluid catalytic cracking catalyst particles by uptake and frequency response methods
Abstract

•D/r02 of guest molecular in REUSY zeolite are smaller than that in FCC catalyst particles.•The intraparticle diffusion play a dominant role in transfer limitation in FCC catalyst particles.•The mass transfer processes in particles can be detected and distinguished by FR technique.•Molecular transfer at the zeolite–matrix interface in FCC catalyst particles is the limiting step.

The mass transfer processes in REUSY zeolites and fluid catalytic cracking (FCC) catalyst particles have been measured and distinguished in this study by uptake method with an intelligent gravimetric analyser (IGA) and by the frequency response (FR) technique. The results indicate that the diffusion time constants in the FCC catalyst particles are smaller than those in the REUSY zeolites, and the limiting steps for the overall mass transfer processes in the FCC catalyst particles are the diffusion process in the length scale of macropore of the matrix or/and the mass transfer at the zeolite–matrix interface rather than the intracrystalline diffusion one in the micropores of the zeolite crystals.

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Keywords
FCC catalyst particles; Mass transfer processes; Frequency response; Diffusion time constant; Zeolite–matrix interface
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Measurements and distinguishment of mass transfer processes in fluid catalytic cracking catalyst particles by uptake and frequency response methods
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 245, 1 May 2015, Pages 147–154
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us