Regenerating a reforming catalyst

Journal Article · Sat Jan 01 04:00:00 EST 1994 · CHEMTECH; (United States)

OSTI ID:7236283

Fung, S C ^[1]

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

The difficulties in the regeneration and redispersion of iridium-containing catalysts using conventional Pt regeneration procedures have been identified. The major problem involves the formation of chlorine-resisting iridium oxide, which exists as agglomerated particles and as an oxide layer on the surface of Ir metal agglomerates. The formation of these iridium oxide species can be avoided if the chloride level on the Al[sub 2]O[sub 3] is brought to high enough levels before oxygen exposure. A practical and convenient way to achieve this is by an HCl treatment of the reduced catalyst before chlorine redispersion. Complete iridium dispersion of badly sintered Ir catalysts has been achieved in one treatment cycle. The success in completely redispersing severely agglomerated Ir catalysts allows the use of higher coke burn temperatures for more complete coke removal.

• OSTI ID: 7236283
• Journal Information: CHEMTECH; (United States), Journal Name: CHEMTECH; (United States) Vol. 24:1; ISSN CHTEDD; ISSN 0009-2703
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC REFORMING
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
METALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PLATINUM
PLATINUM METALS
REFORMER PROCESSES
REGENERATION
TRANSITION ELEMENTS