Acid centers and catalytic activity of high-silica zeolites

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Kinet. Catal. (Engl. Transl.); (United States)

OSTI ID:5853117

Chukin, G O; Khusid, B L; Lupina, M I; Zhdan, P A; Nefedov, B K

The physicochemical properties of the H form of the high-silica zeolites TsVK-I, TsVK-XI, and TsVM have been studied and data on their catalytic properties in m-xylene isomerization reaction have been obtained by IRS and XPES. It was found that the zeolites have B and L acid centers localized on the outer and inner surfaces of their channels and that the number of B centers localized inside the channels and the selectivity of the reaction yielding p-xylene diminish in the order TsVK-I > TsVK-XI > TsVM. Heat and steam treatment increase the selectivity of p-xylene production on account of restriction of the acid centers on the outer surface.

• Research Organization: All-Union Scientific-Research Institute of Petroleum Processing, Moscow (USSR)
• OSTI ID: 5853117
• Journal Information: Kinet. Catal. (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (Engl. Transl.); (United States) Vol. 28:5; ISSN KICAA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKYLATED AROMATICS
AROMATICS
BROENSTED ACIDS
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
HEAT TREATMENTS
HETEROGENEOUS CATALYSIS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFRARED SPECTRA
INORGANIC ACIDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOMERIZATION
LEWIS ACIDS
MASS SPECTRA
MATERIALS
MINERALS
ORGANIC COMPOUNDS
SPECTRA
STEAM
TEMPERATURE EFFECTS
X-RAY SPECTRA
XYLENE-PARA
XYLENES
YIELDS
ZEOLITES