By P. Ruiz, B. Delmon
This quantity includes invited papers and communications awarded on the 3rd ecu Workshop assembly on Selective Oxidation through Heterogeneous Catalysis. the aim of the assembly was once to give fresh effects and to debate new points of partial oxidation through heterogeneous catalysis. the next issues have been mentioned: Novel methods for acquiring new advantageous chemical substances through catalytic partial oxidation; selective oxidation and oxidative dehydrogenation of alkanes; new catalysts and advances in instruction equipment of oxidation catalysts; new phenomena in partial oxidation and new elements of floor chemistry in oxide catalysts; new purposes of physicochemical tools for characterization of oxide catalysts; oxidation with different brokers than oxygen and catalytic oxidation of carbohydrates. This publication will supply a necessary set of information on reactions of selective oxidation on the way to be tremendous priceless to catalyst and comparable practitioners, even if fundamentalists or hugely utilized, and to method engineers who desire to review present findings during this box. The wide-range method of reactions of selective oxidation will disseminate wisdom in really expert components of selective oxidation and inspire innovation and creativity
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Additional resources for New Developments in Selective Oxidation by Heterogeneous Catalysis
Active catalysts included platinum group metals attached to hydrophobic carbon, supported on a mixture of hydrophobic and hydrophilic materials. Only palladium catalysts supported on a hydrophobic component were found to be selective towards hydrogen peroxide formation. The ratio of hydrophobic-to-hydrophiliccatalyst properties was important in determining the H202 yield. The effects of metal particle size and surface area appeared not to be important in determining H,O, yield. A simple way of characterizing catalyst hydrophobicity is proposed.
1. Catalysts Palladium nitrate (Aldrich) dissolved in anhydrous methanol (Molincrockdt, AR) was used to prepare fluorinated carbon-supported catalysts and the solution of palladium nitrate in 5% HN0,-for impregnation of amorphous fumed silica Cab-0-Sil (Cabot, grade HS-5) and Silicalite S-115 (Union Carbide, Linde Division). Surface areas of the supports are given in Table 3. The palladium loading on the above supports, except for a few cases indicated in the text, was 5 wt%. Hydrophobic catalyst supports were prepared by fluorinating activated carbon to contain various amounts of fluorine.
In these representations the Lo phase contains most of the alkane and (in cases C and D) part of the solvent, whereas the La phase contains most of the H202 and H20, suspended TS-1 particles and (in cases C and D) the remaining part of the solvent. Fig. 1: Schematic representation of the reaction media for alkane oxygenation by aqueous H202 on TS-1 in the absence of solvent and without mechanical agitation (A); in the absence of solvent and with mechanical agitation (B); in the presence of solvent and without mechanical agitation (C); in the presence of solvent and with mechanical agitation (D).
New Developments in Selective Oxidation by Heterogeneous Catalysis by P. Ruiz, B. Delmon