Influence of intercrystalline mass transfer on catalytic properties of Pt/H-ZSM-5/Al sub 2 O sub 3 catalyst

Journal Article · Wed Mar 01 04:00:00 EST 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90081-X· OSTI ID:6355430

Choudhary, V R; Akolekar, D B ^[1]

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1. National Chemical Lab., Pune (India)

Influence of intercrystalline (macropore) mass transfer on the catalytic activity and product selectivity in o-xylene isomerization, isooctane cracking, and methanol-to-aromatics conversion reactions on Pt/H-ZSM-5/Al{sub 2}O{sub 3} has been investigated by varying the catalyst particle size. Effect of poisoning of both the inter- and intracrystalline acid sites of the catalyst on its catalytic activity and selectivity has also been investigated. The effective intercrystalline diffusivity of the zeolite catalyst under reaction conditions has been determined by studying a first-order reaction cracking of isooctane (which does not penetrate the zeolite channels) using the catalysts of different particle sizes and determining the effectiveness factor of the catalyst. Both the activity and the selectivity of the catalyst in the above reactions are strongly influenced by the intercrystalline mass transfer.

• OSTI ID: 6355430
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 116:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

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ALCOHOLS
ALKANES
ALKENES
ALKYLATED AROMATICS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
CATALYST SUPPORTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
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CHALCOGENIDES
CHEMICAL REACTIONS
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CRYSTAL STRUCTURE
DECOMPOSITION
ELEMENTS
HYDROCARBONS
HYDROXY COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOMERIZATION
MASS TRANSFER
MATERIALS
METALS
METHANOL
MICROSTRUCTURE
MINERALS
OCTANE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PLATINUM
PLATINUM METALS
POISONING
POROSITY
PYROLYSIS
REFORMER PROCESSES
SIZE
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
XYLENES
ZEOLITES