Download or read book Model Vanadium phosphorous oxygen Catalysts for the Selective Oxidation of C4 Hydrocarbons to Maleic Anhydride written by Thomas Patrick Moser and published by . This book was released on 1986 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vanadium phosphorous oxygen Industrial Catalysts for C4 Hydrocarbon Selective Oxidation to Maleic Anhydride written by Robert Wayne Wenig and published by . This book was released on 1986 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book In Situ Vibrational Spectroscopic Investigation of C4 Hydrocarbon Selective Oxidation Over Vanadium phosphorus oxide Catalysts written by Zhi-Yang Xue and published by . This book was released on 1999 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: The open chain dicarbonyl species then experienced cycloaddition to form maleic anhydride. VPO catalyst phase transformations were investigated using in situ laser Raman spectroscopy. During reduction-oxidation step changes, (VO)2P20-- was readily converted to [Alpha subscript Pi]-, [Delta]-VOP04 and ultimately to [Beta]-VOP04 in O2/N2; these V5 phases were eliminated in n- butane/N2. A "wet" nitrogen feed (5-10% H20 in N2) transformed (VO)2P20-- and [Alpha subscript Iota]-, [Alpha subscript Pi]-, [Beta]-, [Delta]-, [Gamma]-VOP04 to V2O5 at temperatures above 400°C. The presence of water vapor facilitated the loss of oxygen atoms involved in V-O-P bonding; separated vanadium oxide and phosphorus oxide species were formed. The isolated vanadium oxides than transformed to V2O5, and phosphorus species likely diffused from the catalyst lattice in the form of acid phosphates.
Download or read book Selective Oxidation of C4 Hydrocarbons to Maleic Anhydride on V P O Catalysts written by Ramkumar Perumal and published by . This book was released on 1989 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Selective Oxidation of N butane to Maleic Anhydride Over Model Vanadium phosphorus Oxide Catalysts written by Thomas Patrick Moser and published by . This book was released on 1984 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Active and Selective Oxygen in Vanadium Phosphorus Oxide Catalysts for N butane Conversion to Maleic Anhydride written by Mark Edward Lashier and published by . This book was released on 1989 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrothermal Synthesis of Vanadium Phosphorus Oxide Catalysts for Selective Oxidation of N butane to Maleic Anhydride written by Mohd. Hasbi Ab. Rahim and published by . This book was released on 2006 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Physicochemical Characterization of Vanadium Phosphorus Oxide Catalyst for Selective Oxidation of N Butane to Maleic Anhydride written by Ahmad Raslan Mat Hussin and published by . This book was released on 2006 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Preparation and Characterisation of Vanadium Phosphate Catalysts for the Selective Oxidation of N butane to Maleic Anhydride written by Jonathan Keith Bartley and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 1020 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Physico chemical Properties of Nanosized Vanadium Phosphorus Oxide and Its Use as Catalyst in Selective Oxidation of N butane to Maleic Anhydride written by Nurul Suziana Nawi @ Mohamed and published by . This book was released on 2011 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preparation and Characterisation of Vanadium Phosphorus Oxide Catalysts for Butane Oxidation to Maleic Anhydride written by Raja Lafi Al-Otaibi and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis aims the study of new preparative routes to get catalyst precursors VOHPO4.0.5H2O with good catalytic performance for the selective oxidation of n-butane to maleic anhydride. The use of octane as co-solvent shows a significant effect on the morphology of VOHPO4.0.5H2O precursor which was prepared via three different routes. The reaction of VOPO4.2H2O with octane solvent shows the possibility of the intercalation of the octane solvent between the layers of VOPO4.2H2O. This can lead to the formation of VOHPO4.0.5H2O precursors with a new morphology after the reduction step using 1-butanol. In addition, the use of octane as co-solvent with 1-butanol leads to the formation of VOHPO4.0.5H 2O with a different XRD pattern and new morphology. Testing these samples shows that the samples with rosette morphology exhibit the highest conversion and selectivity compared with the new materials prepared. We demonstrate that the use of seed crystals of vanadium phosphate can have a dramatic influence on the morphology and phase identity of the precursor materials. VOHPO4.0.5H2O was prepared from VOPO 4.2H2O using 1- and 3-octanol, 2-butanol and 2-methyl-1-propanol as both solvent and reducing agent. With 1-octanol the reaction temperature was found to be crucial in obtaining a high yield of the precursor phase, and at temperatures ≥160°C a solution, containing V4+ ions formed in preference to VOHPO4.0.5H2O. However, VOHPO4.0.5H2O formation can be achieved by the addition of a small amount of V-P-O materials as seeds if carrying out the reduction process above this temperature. In contrast, when 3-octanol is used, VO(H 2PO4)2 is formed solely, but in the presence of a V-P-O seed significant amounts of VOHPO4.0.5H2O can also be formed. Studying the reaction time online shows that VO(H2PO 4)2 could be transformed to VOHPO4.0.5H2 O, which has been attempted previously without success. Finally, testing these samples under reaction conditions shows that they demonstrate high selectivity toward MA and good conversion compared to VO(H2PO4) 2. Vanadium phosphate catalysts have successfully been prepared in aqueous media using hydrogen. The catalysts precursors obtained were poorly crystalline VOHPO4.05H2O and a minor amount of an impurity detected by a reflection in the XRD pattern. Activating these materials for n-butane oxidation show low selectivity of MA (5%), which could be attributed to the presence of V(V) phases after activation.
Download or read book 2 written by and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preparation and Characterisation at Vanadium Phosphorus Oxide Catalysts for Butane Oxidation to Maleic Anhydride written by Raja Lafi Al-Otaibi and published by . This book was released on 2010 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simple Molybdate Selective Oxidation Catalysts Containing Excess MoO3 for C4 Hydrocarbon Oxidation to Maleic Anhydride written by Umit Sivrioglu Ozkan and published by . This book was released on 1984 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vanadia Catalysts for Processes of Oxidation of Aromatic Hydrocarbons written by Barbara Grzybowska-Świerkosz and published by . This book was released on 1984 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bi Fe Doping and Mechanochemical Treatment of Vanadium Phosphate Catalysts for Selective Oxidation of N butane to Maleic Anhydride written by Chee Keong Goh and published by . This book was released on 2006 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
