20 research outputs found
Vanadium oxide monolayer catalysts. I. Preparation, characterization, and thermal stability
Vanadium oxide catalysts of the monolayer type have been prepared by means of chemisorption of vanadate(V)-anions from aqueous solutions and by chemisorption of gaseous V2O3(OH)4. Using Al2O3, Cr2O3, TiO2, CeO2 and ZrO2, catalysts with an approximately complete monomolecular layer of vanadium(V) oxide on the carrier oxides can be prepared, if temperature is not too high. Divalent metal oxides like CdO and ZnO may already form threedimensional surface vanadates at moderate temperature. \ud
The thermal stability of a monolayer catalyst is related to the parameter z/a, i. e. the ratio of the carrier cation charge to the sum of ionic radii of carrier cation and oxide anion. Thus, monolayer catalysts will be thermally stable only under the condition that z/a is not too high (aggregated catalyst) nor too small (ternary compound formation)
Vanadium oxide monolayer catalysts. I. Preparation, characterization, and thermal stability
Dependence of activity for benzene hydrogenation of nickel on crystallite size
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Verslag behorende bij het processchema van dimethylterephtalaat
Document(en) uit de collectie Chemische ProcestechnologieDelftChemTechApplied Science
Het ontwerp van een Energy Recovery Unit voor een FCC installatie - De economische vergelijking van een FCC installatie bij 2,5 bar en 6,0 bar reactordruk
Document(en) uit de collectie Chemische ProcestechnologieDelftChemTechApplied Science