The M1 Phase of MoVTeNbO as a Catalyst for Olefin Metathesis and Isomerization

Abstract

Polycrystalline MoVTeNb oxide composed of the M1 phase was studied in the transformation of propene at reaction temperatures between 323 and 573 K in the absence of oxygen and water. Surprisingly, the catalyst showed considerable activity in propene metathesis to ethene and 2-butenes, which was attributed to partial reduction of the catalyst surface under the reaction conditions. The multifunctionality of the M1 phase, which is known as a selective catalyst for the direct oxidation of propane to acrylic acid, was furthermore reflected in the formation of 1-butene and isobutene owing to C4 isomerization. This study demonstrates the diversity of the M1 phase as a catalyst, which is based on surface dynamics and structural stability, and further improves the understanding of the complex reaction network of short-chain hydrocarbons over MoVTeNbO M1 catalysts

The Roles of Composition and Mesostructure of Cobalt‐Based Spinel Catalysts in Oxygen Evolution Reactions

“…Heterogeneous oxidation catalysis over mixed metal oxides depends critically on their composition and also properties like particle size, particle morphology, and porosity‐here summarized as mesostructure‐play an important role [1] . Applied catalysts usually have complex multi‐cation compositions that are specifically optimized for a given process [2] . However, systematic studies including different reactions over the same catalyst and comprehensive knowledge of real structure‐reactivity correlation are scarce and have the potential to reveal general trends in heterogeneous catalysis of mixed oxides.…”

“…[1] Applied catalysts usually have complex multi‐cation compositions that are specifically optimized for a given process. [2] However, systematic studies including different reactions over the same catalyst and comprehensive knowledge of real structure‐reactivity correlation are scarce and have the potential to reveal general trends in heterogeneous catalysis of mixed oxides. Therefore, the herein presented work systematically investigates the impact of composition and mesostructure of cobalt‐based spinel oxide catalysts on a variety of oxidation reactions.…”

Thermodynamics and separation process for quaternary acrylic systems

“…Methyl acrylate (MA), as an important industrial monomer, is extensively used to produce such materials as acrylic plastics and paints. The MA production route through propylene or propane oxidation has facilitated industrialization, but the raw materials are mainly obtained from petroleum products. Recently, a new technology has been developed for MA production using MeOAc and formaldehyde as raw materials.…”