Coordinated investigation of catalytic properties and IR spectra of high-silica zeolites in ethylene conversions

Journal Article · Tue Oct 01 04:00:00 EDT 1985 · Kinet. Catal. (Engl. Transl.); (United States)

OSTI ID:7150841

Bragin, O V; Borovkov, V Y; Kustov, L M; Palishkina, N V; Vasina, T V

Catalytic data on ethylene conversion have been compared with the results from an IR spectroscopic study of the composition of the hydroxyl groups and adsorbed reaction products, for exactly the same specimens of high-silica zeolites H-TsVK and H-TsVM, and also a boron-containing silicate (BS) and a silicate without boron (H-S). It has been shown that among the active centers of these catalysts are acidic hydroxyl groups with a stretching frequency of 3610 cm/sup -1/ for vibrations of the O-H bond. In the process of repeated regenerations of the H-TsVK and H-TsVM zeolites, the aluminum is partly removed from the skeleton, resulting in the appearance of new acidic hydroxyl groups corresponding to a band at 3680 cm/sup -1/ in the IR spectra. However, these OH groups do not participate in catalytic conversions of ethylene. It is suggested that C/sub 9/-C/sub 12/ aromatic hydrocarbons are not formed in the channels of the zeolites, but on their outer surface.

• Research Organization: N.D. Zelinskii Institute of Organic Chemistry, Acad. of Sci., Moscow
• OSTI ID: 7150841
• Journal Information: Kinet. Catal. (Engl. Transl.); (United States), Journal Name: Kinet. Catal. (Engl. Transl.); (United States) Vol. 26:2,PT.2; ISSN KICAA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
AROMATICS
AROMATIZATION
BORON COMPOUNDS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CRACKING
DEACTIVATION
DECOMPOSITION
ETHYLENE
HYDROCARBONS
HYDROXYL RADICALS
INFRARED SPECTRA
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PYROLYSIS
RADICALS
REACTION KINETICS
REGENERATION
SILICATES
SILICON COMPOUNDS
SPECTRA
THERMOCHEMICAL PROCESSES
YIELDS
ZEOLITES