The effect of CeO2 on the surface and catalytic properties of Pt/CeO2–ZrO2 catalysts for methane dry reforming

2009 ◽  
Vol 89 (1-2) ◽  
pp. 149-159 ◽  
Author(s):  
S. Damyanova ◽  
B. Pawelec ◽  
K. Arishtirova ◽  
M.V. Martinez Huerta ◽  
J.L.G. Fierro
Keyword(s):  
Catalytic Properties ◽  
Dry Reforming ◽  
Methane Dry Reforming

scholarly journals Structural, Textural, and Catalytic Properties of Ni-CexZr1−xO2 Catalysts for Methane Dry Reforming Prepared by Continuous Synthesis in Supercritical Isopropanol

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3728
Author(s):  
Svetlana Pavlova ◽  
Marina Smirnova ◽  
Aleksei Bobin ◽  
Svetlana Cherepanova ◽  
Vasily Kaichev ◽  
...  
Keyword(s):  
Nickel Nanoparticles ◽  
Catalytic Properties ◽  
Dry Reforming ◽  
High Dispersion ◽  
Incipient Wetness Impregnation ◽  
One Pot ◽  
Methane Dry Reforming ◽  
Continuous Synthesis ◽  
The One ◽  
Supercritical Isopropanol

A series of 5%Ni-CexZr1−xO2 (x = 0.3, 0.5, 0.7) catalysts has been prepared via one-pot solvothermal continuous synthesis in supercritical isopropanol and incipient wetness impregnation of CexZr1−xO2 obtained by the same route. The textural, structural, red-ox, and catalytic properties in methane dry reforming (MDR) of Ni-modified Ce-Zr oxides synthesized by two routes have been compared. It was shown by XRD, TEM, and Raman spectroscopy that the method of Ni introduction does not affect the phase composition of the catalysts, but determines the dispersion of NiO. Despite a high dispersion of NiO and near-uniform distribution of Ni within Ce-Zr particles observed for the one-pot catalysts, they have shown a lower activity and stability in MDR as compared with impregnated ones. This is a result of a low Ni concentration in the surface layer due to segregation of Ce and decoration of nickel nanoparticles with support species.

scholarly journals Nanosized Ni/SBA-15 Catalysts for CO2 Reforming of CH4

2019 ◽  
Vol 9 (9) ◽  
pp. 1926 ◽  
Author(s):  
Ahmed A. Ibrahim ◽  
Ashraf Amin ◽  
Ahmed S. Al-Fatesh ◽  
Nadavala Siva Kumar ◽  
Samsudeen Olajide Kasim ◽  
...  
Keyword(s):  
Bimetallic Catalysts ◽  
Catalytic Properties ◽  
Fixed Bed ◽  
Catalytic Performance ◽  
Dry Reforming ◽  
Fixed Bed Reactor ◽  
Co2 Reforming ◽  
Methane Dry Reforming ◽  
Remarkable Effect ◽  
Co2 Reforming Of Ch4

Ni, Co, and Co–Ni bimetallic catalysts supported over SBA-15 and over SBA-15 doped with Zn or Ce oxides were prepared and tested in a methane dry reforming reaction. The loading of the metals in the catalyst was 5 wt % for either mono or bimetallic catalysts. The prepared catalysts were tested in a continuous-flow fixed-bed reactor at 800 °C under atmospheric pressure. XRD, TPR, TPD, and SEM characterization techniques were employed to investigate the catalytic properties of fresh catalysts. SEM and TGA were used to study the catalytic properties of spent catalysts. A remarkable effect on the reduction properties and catalytic performance of catalysts was observed after adding Zn and Ce. Over an 8 h test, Ni/SBA-15 showed the best activity and stability. The conversion was 90% for CH4 and CO2. Co–Ni/SBA-15 and Co–Ni/Ce–SBA-15 have shown a reasonable activity and stability. Selectivity of the Ni/SBA-15 catalyst was higher than all other catalysts as indicated by the H2/CO ratio. Co/SBA-15 and Co–Ni/Zn–SBA-15 showed a low activity and selectivity. TPD–NH3 profiles indicated that doping SBA-15 with Ce and/or Zn increased the catalyst acidic sites. Ni/SBA-15 is an excellent potential catalyst for commercial methane dry reforming processes.

scholarly journals Kinetic Regularities of Methane Dry Reforming Reaction on Nickel-Containing Modified Ceria–Zirconia

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2973
Author(s):  
Valeria Fedorova ◽  
Mikhail Simonov ◽  
Konstantin Valeev ◽  
Yuliya Bespalko ◽  
Ekaterina Smal ◽  
...  
Keyword(s):  
Flow Reactor ◽  
Catalytic Properties ◽  
Plug Flow ◽  
Reaction Rate Constant ◽  
Dry Reforming ◽  
Incipient Wetness Impregnation ◽  
One Pot ◽  
Methane Dry Reforming ◽  
Metal Support Interaction ◽  
Detailed Kinetics

The Ni-containing catalysts based on ceria–zirconia doped with Ti and Ti+Nb were prepared by the solvothermal method in supercritical fluids. Ni deposition was carried out by incipient wetness impregnation and the one-pot technique. All materials were investigated by a complex of physicochemical methods (XRD, BET, TEM, H2-TPR). Samples catalytic properties were studied in methane dry reforming in the plug-flow reactor. Conversions of CH4 and CO2, H2/CO ratio, and CO and H2 yields were measured, and detailed kinetics analysis was carried out. The influence of Ni loading method and support modification on the catalytic behavior in the methane dry reforming process was studied. The preparation method of catalysts affects the textural characteristics. For one-pot samples, pore volume and surface area are lower than for impregnated samples. For catalysts on modified supports, strong metal–support interaction was shown to increase catalytic activity. A reduction pretreatment of samples was shown to have significant influence on their catalytic properties. The kinetic parameters such as reaction rate constant at 700 °C, effective activation energy, and TOF were estimated and analyzed.

Bi- and trimetallic Ni catalysts over Al2O3 and Al2O3-MO (M = Ce or Mg) oxides for methane dry reforming: Au and Pt additive effects

2014 ◽  
Vol 156-157 ◽  
pp. 350-361 ◽  
Author(s):  
Hongjing Wu ◽  
Giuseppe Pantaleo ◽  
Valeria La Parola ◽  
Anna M. Venezia ◽  
Xavier Collard ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Additive Effects ◽  
Ni Catalysts ◽  
Methane Dry Reforming

scholarly journals Influence of Lanthanide Promoters on Ni/SBA-15 Catalysts for Syngas Production by Methane Dry Reforming

2016 ◽  
Vol 148 ◽  
pp. 1388-1395 ◽  
Author(s):  
Osaze Omoregbe ◽  
Huong T. Danh ◽  
S.Z. Abidin ◽  
H.D. Setiabudi ◽  
Bawadi Abdullah ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Methane Dry Reforming ◽  
Syngas Production

Performance and structural features of LaNi0.5Co0.5O3 perovskite oxides for the dry reforming of methane: influence of the preparation method

2019 ◽  
Vol 43 (27) ◽  
pp. 10763-10773 ◽  
Author(s):  
Maryam Mousavi ◽  
Ali Nakhaei Pour
Keyword(s):  
Preparation Method ◽  
Perovskite Oxides ◽  
Structural Features ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Methane Dry Reforming ◽  
Magnetized Water

LaNiO3 and LaNi0.5Co0.5O3 as perovskites were synthesized in magnetized and non-magnetized water and the activity of the catalysts was evaluated in the methane dry reforming reaction with CO2.

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