Hydrogen reduction of Ga-Pt loaded HZSM-5

Journal Article · Thu Aug 01 00:00:00 EDT 1991 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(91)90140-Y· OSTI ID:5543215

Price, G L ^[1]

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1. Louisiana State Univ., Baton Rouge (United States)

Catalysts containing 1.2, 3.1, 6.1, and 10.0 g Ga as Ga(NO{sub 3}) per 100 g HZSM-5 prepared by incipient wetness impregnation have been subjected to hydrogen reduction at 848 K in a microbalance and the reduction rates and capacities compared with identical materials further impregnated with 0.5 g Pt as Pt(NH{sub 3}){sub 4} (NO{sub 3}){sub 2} per 100 g HZSM-5. Weight loss stoichiometry suggests that supported Ga(NO{sub 3}){sub 3} is converted to Ga{sub 2}O{sub 3} upon calcination in 3% O{sub 2} in He while weight loss stoichiometry upon hydrogen reduction at 848 K in all cases can be correlated (within certain bounds which are discussed) as Ga{sub 2}O{sub 3} + 2H{sup +}Z{sup {minus}} {yields} 2Ga{sup +}Z{sup {minus}} + 3H{sub 2}O, where Z{sup {minus}} is the anionic zeolitic framework. The addition of Pt does not increase the total amount of Ga{sub 2}O{sub 3} which can be reduced even in cases where the cation capacity of the zeolite limits the reduction reaction but does increase the maximum rate of Ga{sub 2}O{sub 3} reduction.

• OSTI ID: 5543215
• Journal Information: Journal of Catalysis; (United States), Vol. 130:2; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
CATALYSTS
CHEMICAL PREPARATION
GALLIUM OXIDES
REDUCTION
ALKANES
AROMATICS
CALCINATION
CHEMICAL REACTIONS
DEHYDROCYCLIZATION
GALLIUM NITRATES
HYDROGEN
IMPREGNATION
LOSSES
PLATINUM
STOICHIOMETRY
SYNTHESIS
WEIGHT
ZEOLITES
CHALCOGENIDES
DECOMPOSITION
ELEMENTS
GALLIUM COMPOUNDS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
METALS
MINERALS
NITRATES
NITROGEN COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
PYROLYSIS
SILICATE MINERALS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
020400 - Petroleum- Processing