Reactions of 1-methyl-2-ethylbenzene. II. A test for bifunctional catalysts

Journal Article · Fri Apr 01 00:00:00 EST 1988 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(88)90325-9· OSTI ID:5306973

Csicsery, S M

The reactions of 1-methyl-2-ethylbenzene are useful for the characterization and evaluation of bifunctional catalysts (which have both acid and metal-type catalytic activities). Platinum (and iridium) catalyze dehydrogenation, dehydrocyclization to indan and indene, ring opening of indan to n-propylbenzene, and hydrogenolyses of the various side-chain bonds. Dehydrocyclization and hydrogenolysis of the aliphatic bond of the ethyl side chain increase with increasing platinum surface area. Certain other metals, such as nickel, catalyze only dehydrogenation and hydrogenolyses. Platinum on strongly acidic silica-alumina support has lower dehydrocyclization and isomerization activity than expected from the Pt surface area and from the acid activity of its support. Strong acid sites and platinum may interact with each other. The interaction reduces specific activities of each. With strongly acidic supports, dehydrocyclization may be a better measure of the available Pt than CO chemisorption, which is not always affected by such interactions. Isomerization and transalkylation of methylethylbenzene are acid-catalyzed reactions. These two reactions are about 100-300 times faster over platinum on a strongly acidic silica-alumina support than over platinum on silica. An advantage of the test is that it can simultaneously measure acid, dehydrocyclization, and hydrogenolysis activities.

• Research Organization: Chevron Research Co., Richmond, CA (USA)
• OSTI ID: 5306973
• Journal Information: J. Catal.; (United States), Vol. 110:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
CATALYSTS
PERFORMANCE TESTING
PETROLEUM FRACTIONS
CHEMICAL REACTIONS
ALKYLATION
CATALYTIC CRACKING
HYDROGENATION
IRIDIUM
ISOMERIZATION
MEASURING METHODS
NICKEL
PLATINUM
CRACKING
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
METALS
PETROLEUM
PLATINUM METALS
PYROLYSIS
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
020400 - Petroleum- Processing