Heterophase isotope exchange and hydrogen spillover on high-silica zeolites containing metals

Journal Article · Fri May 01 04:00:00 EDT 1987 · Dokl. Phys. Chem. (Engl. Transl.); (United States)

OSTI ID:6961266

Minachev, Kh M; Dmitriev, R V; Rassamakhina, I G; Dergachev, A A

The spillover of hydrogen activated by metal atoms or clusters over a support surface is an important step in catalytic processes that involve hydrogen. Recently the authors investigations have turned toward the quantitative study of the role of hydrogen spillover in the reaction of deuterium with the hydroxyl groups of various zeolite structures, and the elucidation of the factors that affect the rates of the individual process steps. This work brings new results on hydrogen spillover mechanism and the course of isotope exchange on pentasil-type zeolites in the presence of adsorbed CO, CO/sub 2/, CH/sub 4/, and O/sub 2/. The kinetics of the reaction D/sub 2/ + OH/sub sur/ in equilibrium HD + OD/sub sur/ on pentasil with Si:Al ratio of 30 containing 1 at. % of Pt, Pd, or Ni was studied in a circulating-static system at 2.6 kPa deuterium pressure. Protium accumulation in the gas phase was followed by mass spectrometric analysis.

• Research Organization: N. D. Zelinskii Institute of Organic Chemistry, Moscow (USSR)
• OSTI ID: 6961266
• Journal Information: Dokl. Phys. Chem. (Engl. Transl.); (United States), Journal Name: Dokl. Phys. Chem. (Engl. Transl.); (United States) Vol. 291:1-3; ISSN DKPCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202* -- Isotope Effects
Isotope Exchange
& Isotope Separation
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
DEUTERIUM
DEUTERIUM COMPOUNDS
ELEMENTS
HETEROGENEOUS CATALYSIS
HYDROCARBONS
HYDROGEN
HYDROGEN 1
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
HYDROGEN TRANSFER
HYDROXIDES
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTOPE EFFECTS
ISOTOPES
ISOTOPIC EXCHANGE
KINETICS
LIGHT NUCLEI
MASS SPECTRA
MATERIALS
METHANE
MINERALS
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
REACTION KINETICS
SILICON COMPOUNDS
SILICON OXIDES
SPECTRA
STABLE ISOTOPES
ZEOLITES