Effect of Support on the Suppression of Hot Spot Formation in the Partial Oxidation of Methane

2009 ◽  
Vol 38 (7) ◽  
pp. 720-721 ◽  
Author(s):  
Tetsuya Shishido ◽  
Reina Morishima ◽  
Yusuke Yoshinaga ◽  
Sadao Hasegawa ◽  
Tsunehiro Tanaka
Keyword(s):  
Partial Oxidation ◽  
Hot Spot ◽  
Partial Oxidation Of Methane ◽  
Oxidation Of Methane ◽  
Effect Of Support ◽  
Hot Spot Formation ◽  
Spot Formation

scholarly journals Study of Partial Oxidation of Methane by Ni/Al2O3 Catalyst: Effect of Support Oxides of Mg, Mo, Ti and Y as Promoters

Molecules ◽  
2020 ◽  
Vol 25 (21) ◽  
pp. 5029
Author(s):  
Ahmed A. Ibrahim ◽  
Wasim U. Khan ◽  
Fahad Al-Mubaddel ◽  
Ahmed S. Al-Fatesh ◽  
Samsudeen O. Kasim ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Partial Oxidation Of Methane ◽  
Catalyst Stability ◽  
Incipient Wetness Impregnation ◽  
Alumina Support ◽  
Oxidation Of Methane ◽  
Temperature Programmed ◽  
Effect Of Support ◽  
H2 Yield ◽  
The Impact

Catalysts of 10% Ni, supported on promoted alumina, were used to accomplish the partial oxidation of methane. The alumina support was doped with oxides of Mo, Mg, Ti and Y. An incipient wetness impregnation technique was used to synthesize the catalysts. The physicochemical properties of the catalysts were described by XRD, H2-TPR (temperature programmed reduction), BET, TGA, CO2-TPD (temperature-programmed desorption) and Raman. The characterization results denoted that Ni has a strong interaction with the support. The TGA investigation of spent catalysts displayed the anticoking enhancement of the promoters. The impact of the support promoters on the catalyst stability, methane conversion and H2 yield was inspected. Stability tests were done for 460 min. The H2 yields were 76 and 60% and the CH4 conversions were 67 and 92%, respectively, over Ni/Al2O3+Mg, when the reaction temperatures were 550 and 650 °C, respectively. The performance of the present work was compared to relevant findings in the literature.

Partial oxidation of methane over bimetallic nickel–lanthanide oxides

2010 ◽  
Vol 489 (1) ◽  
pp. 316-323 ◽  
Author(s):  
Ana C. Ferreira ◽  
A.M. Ferraria ◽  
A.M. Botelho do Rego ◽  
António P. Gonçalves ◽  
M. Rosário Correia ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Partial Oxidation Of Methane ◽  
Lanthanide Oxides ◽  
Oxidation Of Methane

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.

Partial Oxidation of Methane to Syngas via Formate Intermediate Found for a Ruthenium–Rhenium Bimetallic Catalyst

ACS Catalysis ◽  
2021 ◽  
pp. 3782-3789
Author(s):  
Lingcong Li ◽  
Nazmul H. MD Dostagir ◽  
Abhijit Shrotri ◽  
Atsushi Fukuoka ◽  
Hirokazu Kobayashi
Keyword(s):  
Partial Oxidation ◽  
Bimetallic Catalyst ◽  
Partial Oxidation Of Methane ◽  
Oxidation Of Methane ◽  
Formate Intermediate
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