Author: Ahmad Raslan Mat HussinPublisher:
ISBN:
Category : Butane
Languages : en
Pages : 216
Book Description
Synthesis and Physicochemical Characterization of Vanadium Phosphorus Oxide Catalyst for Selective Oxidation of N-Butane to Maleic Anhydride
Author: Ahmad Raslan Mat HussinPublisher:
ISBN:
Category : Butane
Languages : en
Pages : 216
Book Description
Synthesis and Physico-chemical Properties of Nanosized Vanadium Phosphorus Oxide, and Its Use as Catalyst in Selective Oxidation of N-butane to Maleic Anhydride
Author: Nurul Suziana Nawi @ MohamedPublisher:
ISBN:
Category : Catalysts
Languages : en
Pages : 268
Book Description
Hydrothermal Synthesis of Vanadium Phosphorus Oxide Catalysts for Selective Oxidation of N-butane to Maleic Anhydride
Author: Mohd. Hasbi Ab. RahimPublisher:
ISBN:
Category : Butane
Languages : en
Pages : 226
Book Description
The Selective Oxidation of N-butane to Maleic Anhydride Over Model Vanadium-phosphorus Oxide Catalysts
Author: Thomas Patrick MoserPublisher:
ISBN:
Category :
Languages : en
Pages : 260
Book Description
Preparation and Characterisation at Vanadium Phosphorus Oxide Catalysts for Butane Oxidation to Maleic Anhydride
Author: Raja Lafi Al-OtaibiPublisher:
ISBN:
Category : Catalysts
Languages : en
Pages : 386
Book Description
Preparation and Characterisation of Vanadium Phosphorus Oxide Catalysts for Butane Oxidation to Maleic Anhydride
Author: Raja Lafi Al-OtaibiPublisher:
ISBN:
Category : Catalysts
Languages : en
Pages : 0
Book Description
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.
The Preparation and Characterisation of Vanadium Phosphate Catalysts for the Selective Oxidation of N-butane to Maleic Anhydride
Author: Jonathan Keith BartleyAn Investigation of Active and Selective Oxygen in Vanadium Phosphorus Oxide Catalysts for N-butane Conversion to Maleic Anhydride
Author: Mark Edward LashierSelective Oxidation of N-butane to Maleic Anhydrice Over Vanadium Phosphorus Oxide Catalysts Prepared in Organic and Aqueous Media
Author: Fearghal DasonVanadium Phosphate Catalyst Synthesized by Organic Method Using Sonicated V2O5 for Selective Oxidation of N-butane to Maleic Anhydride
Author: Suhaizam Shahrul Affendy SuhaimiPublisher:
ISBN:
Category : Butane
Languages : en
Pages : 208
Book Description