Activity of Ti-Beta catalyst for the selective oxidation of alkenes and alkanes

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1006/jcat.1994.1017· OSTI ID:7288192

Corma, A; Camblor, M A; Esteve, P; Martinez, A; Perez-Pariente, J ^[1]

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1. Universidad Politecnica de Valencia (Spain)

Ti-Beta zeolites with different titanium and aluminum contents have been prepared by changing the concentration of Ti and Al in the synthesis gel and the crystallization time. The gels were prepared from Aerosil as silica source. Ti-Beta samples were characterized by XRD, IR absorption spectroscopy, SEM, and diffuse reflectance (DR) spectroscopy in the UV-visible region. According to the characterization data, in the calcined dehydrated samples, titanium is incorporated into the framework of the zeolite Beta in a tetracoordinated state. No anatase phase was observed in the DR spectra. The catalytic activity for the selective oxidation by H[sub 2]O[sub 2] of alkanes and alkenes with different molecular sizes was measured and compared with that of TS-1 under the same experimental conditions. For molecules whose diffusion is not restricted in either MFI or BEA structures, the intrinsic activity of the Ti centers is lower in Ti-Beta than in TS-1. However, the large-pore Ti-Beta catalyst shows superior activity compared to the medium-pore TS-1 for the oxidation of bulkier molecules. 24 refs., 4 figs., 5 tabs.

• OSTI ID: 7288192
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 145:1; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKANES
ALKENES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
HYDROCARBONS
MICROSCOPY
ORGANIC COMPOUNDS
OXIDATION
SCANNING ELECTRON MICROSCOPY
SCATTERING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION