Low temperature complete combustion of dilute toluene and methyl ethyl ketone over transition metal-doped ZrO2 (cubic) catalysts

2004 ◽  
Vol 5 (3) ◽  
pp. 115-119 ◽  
Author(s):  
V.R Choudhary ◽  
G.M Deshmukh ◽  
S.G Pataskar
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Methyl Ethyl Ketone ◽  
Methyl Ethyl ◽  
Complete Combustion ◽  
Metal Doped

Theoretical Design of Transition Metal-Doped TiO2 for the Selective Catalytic Reduction of NO with NH3 by DFT Calculations

2022 ◽  
Author(s):  
Huiling Zheng ◽  
Renjie Li ◽  
Chengming Zhong ◽  
Zhi Li ◽  
Yikun Kang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Selective Catalytic Reduction ◽  
Transition Metal Oxides ◽  
Catalytic Reduction ◽  
Trade Off ◽  
Reduction Of No ◽  
Theoretical Design ◽  
Scr Of No ◽  
Metal Doped

Many transition metal oxides supported on TiO2 have been studied for selective catalytic reduction (SCR) of NO with NH3. However, the trade-off exists between the low-temperature activity and N2 selectivity....

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.

Methyl ethyl ketone combustion over La-transition metal (Cr, Co, Ni, Mn) perovskites

2009 ◽  
Vol 92 (3-4) ◽  
pp. 445-453 ◽  
Author(s):  
M.C. Álvarez-Galván ◽  
V.A. de la Peña O'Shea ◽  
G. Arzamendi ◽  
B. Pawelec ◽  
L.M. Gandía ◽  
...  
Keyword(s):  
Transition Metal ◽  
Methyl Ethyl Ketone ◽  
Methyl Ethyl

Low-temperature CO oxidation over manganese, cobalt, and nickel doped CeO2 nanorods

RSC Advances ◽  
2016 ◽  
Vol 6 (84) ◽  
pp. 80541-80548 ◽  
Author(s):  
Deshetti Jampaiah ◽  
P. Venkataswamy ◽  
Victoria Elizabeth Coyle ◽  
Benjaram M. Reddy ◽  
Suresh K. Bhargava
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Co Oxidation ◽  
Doped Ceria ◽  
Oxidation Activity ◽  
Low Temperature Co Oxidation ◽  
Doped Ceo2 ◽  
Metal Doped ◽  
Cobalt And Nickel

Transition metal doped ceria nanorods exhibit a better CO oxidation activity at lower temperatures.

scholarly journals Large Electrical Resistance Variation at Low Temperature in Transition Metal-Doped Ge Single Crystals

2015 ◽  
Vol 56 (9) ◽  
pp. 1362-1364 ◽  
Author(s):  
Jiyoun Choi ◽  
Jeongyong Choi ◽  
Sungyoul Choi ◽  
Jongphil Kim ◽  
Sunglae Cho
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Single Crystals ◽  
Electrical Resistance ◽  
Resistance Variation ◽  
Electrical Resistance Variation ◽  
Metal Doped

Study on Performance of Transition Metal-Doped Catalysts for DeNOx at Low-Temperature

2013 ◽  
Vol 873 ◽  
pp. 612-618 ◽  
Author(s):  
Jin Shuo Qiao ◽  
Cui Ya Zhang ◽  
Xiao Ju Yin ◽  
Ke Ning Sun
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Catalytic Reduction ◽  
Sol Gel ◽  
Sulfur Poisoning ◽  
Nox Conversion ◽  
Channel Blocking ◽  
Sulfate Formation ◽  
Temperature Programmed ◽  
Metal Doped

Mn-Ce based catalysts doped with transition metal were synthesized via a sol-gel method for low-temperature Selective catalytic reduction DeNOx. NOx conversion of these catalysts was evaluated under 100 OC-300 OC. H2-Temperature Programmed Reduction was used to investigate the reduction capability effect on NOx conversion. On this basis, sulfur resistance of catalysts was analyzed and Fourier Transform Infrared (FI-IR) spectra were used to discuss sulfur poisoning mechanism of catalysts. The results indicated that NOx conversion of catalysts was Mn-Ce-W0.03 Mn-Ce-Y0.03 > Mn-Ce-Zr0.03 > Mn-Ce >Mn-Ce-La0.03 > Mn-Ce-Pr0.03.W, Zr, Y elements was doped to improve catalytic activity at low-temperature and enhance anti-sulfur ability of catalysts. Especially, W element can restrain sulfate formation and reduce the channel blocking of the catalyst and Mn-Ce-W0.03 catalyst displays optimal performance of resistance to sulfur poisoning.

Sign in / Sign up

Export Citation Format

Share Document