منابع مشابه
Effect of Catalyst Structure on Oxidative Dehydrogenationof Ethane and Propane on Alumina-Supported Vanadia
The catalytic properties of Al2O3-supported vanadia with a wide range of VOx surface density (1.4-34.2 V/nm) and structure were examined for the oxidative dehydrogenation of ethane and propane. UV-visible and Raman spectra showed that vanadia is dispersed predominately as isolated monovanadate species below ~2.3 V/nm. As surface densities increase, two-dimensional polyvanadates appear (2.3-7.0 ...
متن کاملEffects of calcination temperature on the pore size and wall crystalline structure of mesoporous alumina.
In this paper, mesoporous alumina with different pore sizes and wall crystalline structures was synthesized at calcination temperatures over 550 degrees C. The characterization of the samples calcined at 550, 800, 1100, and 1300 degrees C, respectively, was performed using TEM, XRD, FTIR, TG/DTA, and N2 adsorption/desorption techniques. The correlation between pore size and wall crystalline str...
متن کاملEffects of catalyst pore structure and acid properties on the dehydration of glycerol.
Hierarchical porous catalysts have recently attracted increasing interest because of the enhanced accessibility to active sites on such materials. In this context, previously reported hierarchically mesoporous ASN and ASPN materials are evaluated by applying them to the dehydration of glycerol, and demonstrate excellent catalytic performance. In addition, a comprehensive understanding of the ef...
متن کاملMethyl tunnelling of adsorbed methoxy on an alumina catalyst
Electronic Supplementary Information (ESI) for Methyl tunnelling of adsorbed methoxy on an alumina catalyst Stewart F. Parker, Victoria García Sakai, David Lennon, Alice Jackson, Mark R. Johnson and Upali A. Jayasooriya a ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK. b UK Catalysis Hub, Research Complex at Harwell, STFC Rutherford Appleton Labora...
متن کاملA Parallel - Consecutive Reaction Scheme in Three-dimensional Pore Structure Catalyst Pellet
The three-dimensional pore model, that characterizes solid materials prepared by aggregating and coalescing spherical microparticles, is used to evaluate the role of structural and transport parameters in a catalytic system of parallel consecutive first order reactions. The selection of the optimum catalyst structure (porosity), which leads to maximum reaction rates, is illustrated. The effects...
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ژورنال
عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan
سال: 1969
ISSN: 0023-2734,2185-0860
DOI: 10.1246/nikkashi1898.72.4_823