Catalytic Stability of Ni Catalyst for Partial Oxidation of Methane to Syngas

2003 ◽  
pp. 246-259
Author(s):  
Zhenhua Li ◽  
Xiangyu Zhang ◽  
Fei He ◽  
Genhui Xu
Keyword(s):  
Partial Oxidation ◽  
Partial Oxidation Of Methane ◽  
Ni Catalyst ◽  
Oxidation Of Methane ◽  
Catalytic Stability

The Reaction Scheme of Partial Oxidation of Methane to Synthesis Gas over Metallic Ni Catalyst

2012 ◽  
Vol 560-561 ◽  
pp. 309-320
Author(s):  
Xue Bin Hong ◽  
Ya Quan Wang ◽  
Cong Zhang
Keyword(s):  
Partial Oxidation ◽  
Synthesis Gas ◽  
Reaction Scheme ◽  
Partial Oxidation Of Methane ◽  
Ni Catalyst ◽  
Kinetic Regime ◽  
Oxidation Of Methane ◽  
Operational Variables ◽  
Mass And Heat Transfer ◽  
Significant Mass

A metallic Ni catalyst was prepared with nickel sponge, followed by acid treatment. The reaction scheme of partial oxidation of methane to synthesis gas over the metallic Ni catalyst had been suggested and researched. For defining the logical kinetic regime, the effects of operational variables on mass and heat transport resistances were investigated. In the absence of significant mass and heat transfer resistances, high selectivities to syngas were obtained on the metallic Ni catalyst even in the low methane conversion range. With the increase of CH4/O2 ratios, the selectivities to H2 and CO on the metallic Ni catalyst also increased.

Zirconia Promoted Nickel Nanowire Catalyst for the Partial Oxidation of Methane to Synthesis Gas

2013 ◽  
Vol 791-793 ◽  
pp. 106-111
Author(s):  
Xue Bin Hong ◽  
Bing Bing Li ◽  
Cong Zhang
Keyword(s):  
Partial Oxidation ◽  
Catalytic Properties ◽  
Physical Adsorption ◽  
High Specific Surface Area ◽  
Partial Oxidation Of Methane ◽  
Ni Catalyst ◽  
Templating Method ◽  
Oxidation Of Methane ◽  
Transmission Electron ◽  
Nickel Nanowire

A zirconia promoted nickel nanowire catalyst was prepared by a hard templating method, and characterized by transmission electron microscopy (TEM) and N2 physical adsorption. The catalytic properties of the zirconia promoted nanowire catalyst in the partial oxidation of methane to syngas were compared with a metallic Ni catalyst which was prepared with nickel sponge. The characterization results showed that the zirconia promoted nickel nanowire catalyst had high specific surface area and there was more NiO phase in the nickel nanowire catalyst than in the metallic Ni catalyst. The reaction results showed that the zirconia promoted nickel nanowire catalyst had high CH4 conversion and selectivities to H2 and CO.

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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