TITLE

The Effects of Al2O3 Addition and WO3 Modification on Catalytic Activities of NiO/TiO2 for Acid Catalysis

AUTHOR(S)
Jong Rack Sohn; Sung Gyu Lee
PUB. DATE
January 2008
SOURCE
Catalysis Letters;Jan2008, Vol. 120 Issue 1/2, p116
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
NiO/Al2O3–TiO2/WO3 catalysts for acid catalysis were prepared by the addition of Al2O3 and the modification with WO3. The strong acid sites were formed through the bonding between dispersed WO3 and TiO2. The larger the dispersed WO3 amount, the higher both the acidity and catalytic activity. The addition of Al2O3 up to 5 mol% enhanced acidity and catalytic activity of NiO/Al2O3–TiO2/WO3 gradually due to the interaction between Al2O3 and TiO2 and consequent formation of Al–O–Ti bond. The presence of NiO may attract reactants and enhance the local concentration of reactants near acid sites and consequently increase catalytic activity.
ACCESSION #
28110351

 

Related Articles

  • Characterization of Pd-mordenite Catalysts for NO Decomposition. de Oliveira, Andréa Marins; Costilla, Ignácio; Gigola, Carlos; Baibich, Ione Maluf; da Silva, Victor Teixeira; Castellã Pergher, Sibele B. // Catalysis Letters;Jun2010, Vol. 136 Issue 3/4, p185 

    The aim of this study was to characterize Pd catalysts supported on three different mordenite zeolites (a commercial sample and two laboratory preparations) previously tested for the NO decomposition reaction. H2 chemisorption, TPR, FTIR spectroscopy of adsorbed CO and NO, DRS UV–vis and...

  • nCharacterization of CeO2, ZrO2, and CeZrO2 Crystals on CNT. MATUS, K.; ŁAMACZ, A.; LISZKA, B. // Acta Physica Polonica, A.;2016, Vol. 130 Issue 4, p966 

    Carbon nanotubes are increasingly being used as a support for catalyst particles. Carbon nanotubes are also used for filtering and reduction, their widespread use due to the high surface area which allows for attachment to the surface of carbon nanotubes a large amount of metallic (Ni, Fe, Pt,...

  • Reversed Micellar Route: Synthesis and Characterization of Metal Oxide Nanoparticles. Kumari, Suman; Shukla, Mithlesh; Shukla, R. K. // AIP Conference Proceedings;12/12/2011, Vol. 1393 Issue 1, p373 

    Reversed micellar route is one of the most recognized chemical method due to several advantages. Uniform and monophasic nanostructures can be obtained by controlling microemulsion parameters such as solvent, surfactant, cosurfactant, and W/O parameter. In general, micro emulsion is an isotopic,...

  • Hydrogen Bonding Interaction between 1-Propanol and Acrylic Esters in Non-polar Solvents: An FTIR Study. Dharmalingam, Kurunthu; Ramachandran, Krishnamurthy; Sivagurunathan, Periyasamy // South African Journal of Chemistry;2006, Vol. 59, p75 

    The association between 1-propanol and acrylic esters (methyl methacrylate, ethyl methacrylate and butyl methacrylate) in non-polar solvents, viz. n-heptane, CCl4, and benzene has been investigated by means of FTIR spectroscopy. The formation constants of the 1:1 complexes have been calculated...

  • In Situ FT-IR Mechanistic Investigations of the Zeolite Catalyzed Methylation of Benzene with Methanol: H-ZSM-5 versus H-beta. Saepurahman; Visur, Melina; Olsbye, Unni; Bjørgen, Morten; Svelle, Stian // Topics in Catalysis;Nov2011, Vol. 54 Issue 16-18, p1293 

    The methylation of aromatics is a reaction step that occurs in several petrochemical processes. Here, we have investigated the methylation of benzene by methanol over H-ZSM-5 and H-beta catalysts by conducting kinetic measurements and in situ FT-IR spectroscopy at comparable reaction conditions....

  • Highly active and reusable heterogeneous catalysts for acylation of anisole. Hsu, H.; Selvin, Rosilda; Her, T. // Journal of Thermal Analysis & Calorimetry;Aug2007, Vol. 89 Issue 2, p379 

    In the present study, non-conventional solid acid catalysts such as NaY, metal ion exchanged zeolite NaY (Zn2+, Fe3+, Ce3+, La3+ and Nd3+), H-mordenite, H-β and HZSM-5 were used in order to overcome the disadvantages of conventional Friedel-Crafts catalysts for the acylation of anisole with...

  • Simple evaluation of the adsorption states of benzene molecule on the hydroxyl, H and Na sites of Y-zeolite surfaces by using UV absorption spectroscopy. Takeuchi, Masato; Hidaka, Manabu; Anpo, Masakazu // Research on Chemical Intermediates;Jul2014, Vol. 40 Issue 6, p2315 

    Chemical properties of benzene molecules adsorbed on the hydroxyl, H and Na sites of Y-zeolite surfaces were investigated by using UV absorption and FT-IR spectroscopies. The analyses on the IR peaks assigned to a C-H out-of-plane vibration mode revealed two different adsorption states of...

  • Anchoring of ruthenium onto imine-functionalized zeolite beta: an efficient route for the synthesis of 4 H-benzo[ b]pyrans and pyrano[ c]chromenes. Tabatabaeian, Khalil; Zanjanchi, Mohammad Ali; Mamaghani, Manouchehr; Dadashi, Ali // Canadian Journal of Chemistry;Nov2014, Vol. 92 Issue 11, p1086 

    The synthesis and characterization of a highly efficient and reusable catalyst, ruthenium immobilized in zeolite beta, are reported. The catalyst was characterized by powder X-ray diffraction, BET surface area measurements, scanning electron micrographs, Fourier-transform infrared spectroscopy,...

  • Methanol Conversion to Hydrocarbons (MTH) Over H-ITQ-13 (ITH) Zeolite. Skistad, Wegard; Teketel, Shewangizaw; Bleken, Francesca; Beato, Pablo; Bordiga, Silvia; Nilsen, Merete; Olsbye, Unni; Svelle, Stian; Lillerud, Karl // Topics in Catalysis;Feb2014, Vol. 57 Issue 1-4, p143 

    Product flexibility is key to meeting fluctuating chemicals demands in the future. In this contribution, the methanol to hydrocarbons (MTH) reaction was investigated over two Ge-containing H-ITQ-13 samples, one with needle-like (H-ITQ-13(N), with (Si+Ge)/Al) = 42) and another with plate-like...

Share

Read the Article

Courtesy of MICHIGAN ELIBRARY

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics