Selective Oxidation of Methacrolein towards Methacrylic Acid on Mixed Oxide (Mo, V, W) Catalysts. Part 2. Variation of Catalyst Composition and Comparison with Acrolein Oxidation

2006 ◽  
Vol 45 (26) ◽  
pp. 8801-8806 ◽  
Author(s):  
Harald Böhnke ◽  
Johann Gaube ◽  
Jochen Petzoldt
Keyword(s):  
Selective Oxidation ◽  
Methacrylic Acid ◽  
Mixed Oxide ◽  
Catalyst Composition

True Catalytically Active Structure in Mo–V-Based Mixed Oxide Catalysts for Selective Oxidation of Acrolein

ACS Catalysis ◽  
2021 ◽  
pp. 10294-10307
Author(s):  
Satoshi Ishikawa ◽  
Yudai Yamada ◽  
Naoki Kashio ◽  
Nagisa Noda ◽  
Kosuke Shimoda ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Mixed Oxide ◽  
Oxide Catalysts ◽  
Active Structure ◽  
Mixed Oxide Catalysts ◽  
Catalytically Active

Synergistic effect of bimetallic Au-Pd supported on ceria-zirconia mixed oxide catalysts for selective oxidation of glycerol

2016 ◽  
Vol 197 ◽  
pp. 222-235 ◽  
Author(s):  
Carol M. Olmos ◽  
Lidia E. Chinchilla ◽  
Elodie G. Rodrigues ◽  
Juan J. Delgado ◽  
Ana B. Hungría ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Selective Oxidation ◽  
Mixed Oxide ◽  
Oxide Catalysts ◽  
Mixed Oxide Catalysts

scholarly journals Statistically Guided Synthesis of MoV-Based Mixed-Oxide Catalysts for Ethane Partial Oxidation

Catalysts ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 370
Author(s):  
Juan Jimenez ◽  
Kathleen Mingle ◽  
Teeraya Bureerug ◽  
Cun Wen ◽  
Jochen Lauterbach
Keyword(s):  
Acetic Acid ◽  
Partial Oxidation ◽  
Mixed Oxide ◽  
Structural Integrity ◽  
Product Distribution ◽  
Catalytic Performance ◽  
Oxide Catalysts ◽  
Acid Yield ◽  
Mixed Oxide Catalysts ◽  
Catalyst Composition

The catalytic performance of Mo8V2Nb1-based mixed-oxide catalysts for ethane partial oxidation is highly sensitive to the doping of elements with redox and acid functionality. Specifically, control over product distributions to ethylene and acetic acid can be afforded via the specific pairing of redox elements (Pd, Ni, Ti) and acid elements (K, Cs, Te) and the levels at which these elements are doped. The redox element, acid element, redox/acid ratio, and dopant/host ratio were investigated using a three-level, four-factor factorial screening design to establish relationships between catalyst composition, structure, and product distribution for ethane partial oxidation. Results show that the balance between redox and acid functionality and overall dopant level is important for maximizing the formation of each product while maintaining the structural integrity of the host metal oxide. Overall, ethylene yield was maximized for a Mo8V2Nb1Ni0.0025Te0.5 composition, while acetic acid yield was maximized for a Mo8V2Nb1Ti0.005Te1 catalyst.

scholarly journals Selective Oxidation of Glycerol Using 3% H2O2 Catalyzed by Supported Nano-Au Catalysts

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 505 ◽  
Author(s):  
Xiaoli Wang ◽  
Gongde Wu ◽  
Tongfa Jin ◽  
Jie Xu ◽  
Shihao Song
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Selective Oxidation ◽  
Mixed Oxide ◽  
Transition Metal Oxides ◽  
Mixed Oxides ◽  
Catalytic Performance ◽  
Glyceric Acid ◽  
Glycerol Conversion ◽  
Composition And Structure

A series of transition metal oxides or mixed oxides supported nano-Au catalysts were prepared for the selective oxidation of glycerol to glyceric acid using 3% H2O2. It was found that the composition and structure of supports significantly influenced the catalytic performance of catalysts. The mesoporous trimetal mixed oxide (CuNiAlO) supported nano-Au catalysts were more active in comparison with the others. In the present catalytic system, the highest glycerol conversion was 90.5%, while the selectivity of glyceric acid could reach 72%. Moreover, the catalytic performance remained after 11 times of reaction.

scholarly journals Selective oxidation of isobutane on V-Mo-O mixed oxide catalysts

2008 ◽  
Vol 73 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Gheorghita Mitran ◽  
Ioan-Cezar Marcu ◽  
Tatiana Yuzhakova ◽  
Ioan Sandulescu
Keyword(s):  
Selective Oxidation ◽  
Mixed Oxide ◽  
Atmospheric Pressure ◽  
Contact Time ◽  
Molar Ratio ◽  
Mixed Metal Oxides ◽  
High Carbon ◽  
Carbon Oxides ◽  
Mixed Oxide Catalysts ◽  
Effects Of Temperature

Four V-Mo-O mixed metal oxides were prepared, characterized and tested for the selective oxidation of isobutane in the temperature range 350-550?C, at atmospheric pressure. Isobutane was mainly oxidized to isobutene and carbon oxides. The systems with low vanadium contents showed low activities but high isobutene selectivities, while the systems with high vanadium contents showed high activities with high carbon oxides selectivities. The effects of temperature, contact time and the molar ratio iso-butane to oxygen on the conversion of isobutane and the selectivity of the oxidation were studied.

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