scholarly journals Understanding the Promotional Effect of Mn2O3 on Micro-/Mesoporous Hybrid Silica Nanocubic-Supported Pt Catalysts for the Low-Temperature Destruction of Methyl Ethyl Ketone: An Experimental and Theoretical Study

ACS Catalysis ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 4213-4229 ◽  
Author(s):  
Chi He ◽  
Zeyu Jiang ◽  
Mudi Ma ◽  
Xiaodong Zhang ◽  
Mark Douthwaite ◽  
...  
Keyword(s):  
Low Temperature ◽  
Methyl Ethyl Ketone ◽  
Theoretical Study ◽  
Pt Catalysts ◽  
Methyl Ethyl ◽  
Hybrid Silica ◽  
Promotional Effect ◽  
Supported Pt Catalysts

The slow oxidation of gaseous methyl ethyl ketone

1950 ◽  
Vol 201 (1064) ◽  
pp. 26-39 ◽  
Keyword(s):  
Low Temperature ◽  
Methyl Ethyl Ketone ◽  
Oxygen Pressure ◽  
Volume Ratio ◽  
Initial Pressure ◽  
Inert Gases ◽  
Methyl Ethyl ◽  
Sharp Maximum ◽  
Temperature Mode ◽  
Branching Chains

The kinetics of the reaction between oxygen and gaseous methyl ethyl ketone (butanone) have been investigated in the range 250 to 450° C. The anomalous temperature coefficient of the rate offers a good example of the transition from a low-temperature mode of oxidation to a high-temperature mode. Similar behaviour has been observed with hydrocarbons and is ascribable to the diminishing part played at higher temperatures by the peroxides, which at low temperatures play a key role in generating branching chains. In the low-temperature range the rate of oxidation varies steeply with the initial pressure of butanone and is a very unusual function of the oxygen pressure, passing through a sharp maximum at certain pressures above which the rate falls and then tends to become constant. The maximum tends to disappear as the temperature is raised. Increase of the surface / volume ratio causes a diminution in rate, while addition of inert gases has no appreciable influence. The various complex relationships are well accounted for in their general form by a modification of the theory previously applied to pentane and hexane. This theory postulates a series of reaction steps of maximum simplicity, permitting a slow branching of chains by fission of peroxides. It leads to a rate expression which according to circumstances may become infinite at certain critical concentrations or remain finite throughout. The critical limits may be related to explosions or cool flames. In the application to butanone oxidation the peculiar form of the dependence of rate on oxygen pressure may be accounted for and a general account given of the observed cool-flame limits. The agreement of the theory with a number of rather unusual facts is considered to be of greater significance than its lack of quantitative accuracy which is ascribed to the approximate nature of its basis.

scholarly journals Promotional effect of metal encapsulation on reactivity of iron oxide supported Pt catalysts

2011 ◽  
Vol 391 (1-2) ◽  
pp. 407-410 ◽  
Author(s):  
M. Lewandowski ◽  
Y.N. Sun ◽  
Z.-H. Qin ◽  
S. Shaikhutdinov ◽  
H.-J. Freund
Keyword(s):  
Iron Oxide ◽  
Pt Catalysts ◽  
Promotional Effect ◽  
Supported Pt Catalysts

Low-temperature CO oxidation over supported Pt catalysts prepared by colloid-deposition method

2008 ◽  
Vol 9 (6) ◽  
pp. 1045-1049 ◽  
Author(s):  
Suying Li ◽  
Gang Liu ◽  
Honglei Lian ◽  
Mingjun Jia ◽  
Guoming Zhao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Pt Catalysts ◽  
Deposition Method ◽  
Supported Pt Catalysts ◽  
Low Temperature Co Oxidation ◽  
Colloid Deposition

Tuning the micromorphology and exposed facets of MnOx promotes methyl ethyl ketone low-temperature abatement: boosting oxygen activation and electron transmission

2018 ◽  
Vol 8 (15) ◽  
pp. 3863-3875 ◽  
Author(s):  
Yanfei Jian ◽  
Mudi Ma ◽  
Changwei Chen ◽  
Chao Liu ◽  
Yanke Yu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Methyl Ethyl Ketone ◽  
Oxygen Activation ◽  
Methyl Ethyl ◽  
Electron Transmission ◽  
Exposed Facets

MnOx nanowires with highly exposed {101} facets of Mn3O4 possess excellent low-temperature activity and stability for methyl ethyl ketone destruction.

Promotional effect of Cu on the structure and chloronitrobenzene hydrogenation performance of carbon nanotube and activated carbon supported Pt catalysts

2013 ◽  
Vol 464-465 ◽  
pp. 28-34 ◽  
Author(s):  
N. Mahata ◽  
O.S.G.P. Soares ◽  
I. Rodríguez-Ramos ◽  
M.F.R. Pereira ◽  
J.J.M. Órfão ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Nanotube ◽  
Pt Catalysts ◽  
Promotional Effect ◽  
Supported Pt Catalysts
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