Primary and secondary cracking analysis: A new and simple method for estimating diffusional inhibition

Conference · Wed Apr 01 04:00:00 EST 1987 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)

OSTI ID:5086599

Tauster, S J; Ho, T C; Fung, S C ^[1]

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1. Exxon Research and Engineering Co., Annandale, NJ (USA)

The importance of diffusional inhibition in catalysis has long been recognized. Particle-size-variation is sometimes employed, but this requires repeat runs with each catalyst, and furthermore cannot reveal micropore-diffusional inhibition, e.g., blockage of zeolite channels. The authors have developed a simple method of addressing this problem applicable to a broad range of model compound hydrocarbon reactions. Cracking is ubiquitous in such systems. The cracking pattern can be analyzed to delineate its primary and secondary components. Cracking can be treated as a sequential reaction (A{yields}B{yields}C). Since sequential reactions are sensitive to diffusion, diffusional inhibition can be measured in situ. Thus, the information pertains to the catalyst under actual experimental conditions. Both macropore- and micropore-inhibition are measured, as well as sudden changes, caused, e.g., by pore-blockage due to coke formation.

• OSTI ID: 5086599
• Report Number(s): CONF-8704348--
• Conference Information: Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) Journal Volume: 32:2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CARBONIZATION
CATALYTIC CRACKING
CHEMICAL REACTIONS
COKING
CRACKING
DATA
DECOMPOSITION
DIFFUSION
EXPERIMENTAL DATA
IN-SITU PROCESSING
INFORMATION
MATHEMATICAL MODELS
NUMERICAL DATA
POROSITY
PROCESSING
PYROLYSIS
THERMOCHEMICAL PROCESSES