Semiconductor Sensors Based on SnO2 with Pt Additives and their Catalytic Activity in Oxidation of Methane

2005 ◽  
Vol 41 (3) ◽  
pp. 187-191 ◽  
Author(s):  
V. K. Yatsimirskii ◽  
N. P. Maksimovich ◽  
A. G. Telegeeva ◽  
N. V. Nikitina ◽  
N. A. Boldyreva
Keyword(s):  
Catalytic Activity ◽  
Oxidation Of Methane ◽  
Semiconductor Sensors

scholarly journals Oscillatory Behaviour of Ni Supported on ZrO2 in the Catalytic Partial Oxidation of Methane as Determined by Activation Procedure

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2495
Author(s):  
Daniela Pietrogiacomi ◽  
Maria Cristina Campa ◽  
Ida Pettiti ◽  
Simonetta Tuti ◽  
Giulia Luccisano ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Partial Oxidation ◽  
Active Sites ◽  
Direct Reduction ◽  
Partial Oxidation Of Methane ◽  
Catalytic Partial Oxidation ◽  
Oxidation Of Methane ◽  
Short Contact Time ◽  
Oxidation Reduction ◽  
Ni Species

Ni/ZrO2 catalysts, active and selective for the catalytic partial oxidation of methane to syngas (CH4-CPO), were prepared by the dry impregnation of zirconium oxyhydroxide (Zhy) or monoclinic ZrO2 (Zm), calcination at 1173 K and activation by different procedures: oxidation-reduction (ox-red) or direct reduction (red). The characterization included XRD, FESEM, in situ FTIR and Raman spectroscopies, TPR, and specific surface area measurements. Catalytic activity experiments were carried out in a flow apparatus with a mixture of CH4:O2 = 2:1 in a short contact time. Compared to Zm, Zhy favoured the formation of smaller NiO particles, implying a higher number of Ni sites strongly interacting with the support. In all the activated Ni/ZrO2 catalysts, the Ni–ZrO2 interaction was strong enough to limit Ni aggregation during the catalytic runs. The catalytic activity depended on the activation procedures; the ox-red treatment yielded very active and stable catalysts, whereas the red treatment yielded catalysts with oscillating activity, ascribed to the formation of Niδ+ carbide-like species. The results suggested that Ni dispersion was not the main factor affecting the activity, and that active sites for CH4-CPO could be Ni species at the boundary of the metal particles in a specific configuration and nuclearity.

Effect of Pt and Pd Additives on the Hydrogen Sensitivity of Semiconductor Sensors and Their Catalytic Activity in Oxidation of Hydrogen

2005 ◽  
Vol 41 (5) ◽  
pp. 318-322
Author(s):  
V. K. Yatsimirskii ◽  
N. P. Maksimovich ◽  
O. Yu. Boldyreva ◽  
N. V. Nikitina ◽  
A. G. Telegeeva
Keyword(s):  
Catalytic Activity ◽  
Oxidation Of Hydrogen ◽  
Semiconductor Sensors

scholarly journals Pembuatan Katalis Pd-Ce/γ –Al2O3 dan Uji Aktivitas terhadap Oksidasi Metana

1999 ◽  
Vol 2 (3) ◽  
pp. 104-111
Author(s):  
Ahmad Suseno ◽  
Triyono Triyono ◽  
Bambang Setiaji
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Pore Volume ◽  
Pore Radius ◽  
Flow Reactor ◽  
Chloride Salt ◽  
Oxidation Of Methane ◽  
Sorption Method ◽  
Determine Surface Area ◽  
Products Of Reaction

Effects of Ce addition on Pt/γ - Al2O3 catalysts preparation and their catalytic activity on oxidation of methane have been investigated. In this study, the catalysts were prepared by impregnating chloride salt solution of palladium and sulphate salt of cerium on γ-AI2O3 support. Characterization of catalysts was conducted by gas sorption method to determine surface area, pore radius and pore volume. The test of catalytic activity on oxidation of methane was carried out in a flow reactor system at a temperature range from 350°C to 600°C. Products of reaction were analysed by non-dispersive IR spectroscopy. It was observed that the surface area, pore radius and pore volume decrease with the addition of cerium. The results of oxidation process showed that Pd-Ce/γ-Al2O3 catalyst can be used for oxidation of methane up to 90.62% conversion

CATALYTIC ACTIVITY FOR METHANE OXIDATION OF GOETHITE SUPPORTED ON ALUMINA

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4249-4254 ◽  
Author(s):  
KEI-ICHIRO MURAI ◽  
KOHEI TOMITA ◽  
SUGURU TOJO ◽  
TOSHIHIRO MORIGA ◽  
ICHIRO NAKABAYASHI
Keyword(s):  
Catalytic Activity ◽  
Specific Surface ◽  
Methane Oxidation ◽  
Model Experiment ◽  
The Other ◽  
Catalytic Activities ◽  
Surface Areas ◽  
Oxidation Of Methane ◽  
Other Hand ◽  
Specific Surface Areas

Two kinds of α- Fe 2 O 3 catalysts supported on χ- Al 2 O 3 and γ- Al 2 O 3 were synthesized. α- Fe 2 O 3 was prepared from α- FeOOH . As a model experiment, an investigation was made with the oxidation of methane. As all catalysts with various Fe contents supported on χ- Al 2 O 3 with various Fe contents had higher specific surface areas than those supported on γ- Al 2 O 3, α- Fe 2 O 3/χ- Al 2 O 3 catalyst has higher catalytic activities than α- Fe 2 O 3/γ- Al 2 O 3 catalyst. From SEM-EDS analyses, it is concluded that in α- Fe 2 O 3/χ- Al 2 O 3 catalyst, α- Fe 2 O 3 exists mainly on the surface of the support, because of flatness of the surface of χ- Al 2 O 3. On the other hand, in the case of α- Fe 2 O 3/γ- Al 2 O 3 catalyst, as the surface of support, γ- Al 2 O 3, is uneven, α- Fe 2 O 3 do not partially exist on the surface but in the pores.

Effect of Pt nanoparticle size on the specific catalytic activity of Pt/SiO2 and Pt/TiO2 in the total oxidation of methane and n-butane

2010 ◽  
Vol 59 (9) ◽  
pp. 1713-1719 ◽  
Author(s):  
A. Yu. Stakheev ◽  
A. M. Gololobov ◽  
I. E. Beck ◽  
G. O. Bragina ◽  
V. I. Zaikovsky ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Nanoparticle Size ◽  
Pt Nanoparticle ◽  
Total Oxidation ◽  
Oxidation Of Methane ◽  
Specific Catalytic Activity

scholarly journals Enhanced catalytic activity of Ni on η-Al 2 O 3 and ZSM-5 on addition of ceria zirconia for the partial oxidation of methane

2017 ◽  
Vol 212 ◽  
pp. 68-79 ◽  
Author(s):  
Ahmed I. Osman ◽  
Jonathan Meudal ◽  
Fathima Laffir ◽  
Jillian Thompson ◽  
David Rooney
Keyword(s):  
Catalytic Activity ◽  
Partial Oxidation ◽  
Partial Oxidation Of Methane ◽  
Oxidation Of Methane
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