scholarly journals Dry reforming of methane over nickel supported on Nd–ceria: enhancement of the catalytic properties and coke resistance

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33059-33070
Author(s):  
Hugo A. Lara-García ◽  
Daniel G. Araiza ◽  
Melissa Méndez-Galván ◽  
Samuel Tehuacanero-Cuapa ◽  
Antonio Gómez-Cortés ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Dry Reforming ◽  
Coke Deposition ◽  
Dry Reforming Of Methane

The Nd-doped CeO2 support enhances the reactivity of the catalysts, selectivity toward hydrogen and stability by improving coke deposition resistance.

Study of effect of preparation method and composition on the catalytic properties of complex oxides (Gd,Sr) n + 1Fe n O3n + 1 for dry reforming of methane

2017 ◽  
Vol 12 (3-4) ◽  
pp. 174-184 ◽  
Author(s):  
T. F. Sheshko ◽  
Yu. M. Serov ◽  
T. A. Kryuchkova ◽  
I. A. Khayrullina ◽  
I. V. Chislova ◽  
...  
Keyword(s):  
Preparation Method ◽  
Catalytic Properties ◽  
Complex Oxides ◽  
Dry Reforming ◽  
Dry Reforming Of Methane

scholarly journals Factors affecting the long-term stability of mesoporous nickel-based catalysts in combined steam and dry reforming of methane

2016 ◽  
Vol 6 (12) ◽  
pp. 4616-4631 ◽  
Author(s):  
K. Jabbour ◽  
N. El Hassan ◽  
A. Davidson ◽  
S. Casale ◽  
P. Massiani
Keyword(s):  
Dry Reforming ◽  
Coke Deposition ◽  
Dry Reforming Of Methane ◽  
One Pot ◽  
Factors Affecting ◽  
Term Stability ◽  
Long Term Stability ◽  
Highly Efficient ◽  
One Pot Synthesis

Direct “one-pot” synthesis is highly efficient to obtain performing mesoporous Ni–Al2O3catalysts able to resist deactivation by sintering and coke deposition during CH4reforming by CO2and H2O to produce “metgas”.

Nickel ferrite spinel as catalyst precursor in the dry reforming of methane: Synthesis, characterization and catalytic properties

2012 ◽  
Vol 21 (5) ◽  
pp. 595-604 ◽  
Author(s):  
Rafik Benrabaa ◽  
Hamza Boukhlouf ◽  
Axel Löfberg ◽  
Annick Rubbens ◽  
Rose-Nöelle Vannier ◽  
...  
Keyword(s):  
Nickel Ferrite ◽  
Catalytic Properties ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Catalyst Precursor ◽  
Ferrite Spinel

Catalytic properties of Rh, Ni, Pd and Ce supported on Al-pillared montmorillonites in dry reforming of methane

2009 ◽  
Vol 141 (3-4) ◽  
pp. 385-392 ◽  
Author(s):  
S. Barama ◽  
C. Dupeyrat-Batiot ◽  
M. Capron ◽  
E. Bordes-Richard ◽  
O. Bakhti-Mohammedi
Keyword(s):  
Catalytic Properties ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Pillared Montmorillonites

scholarly journals Mechanistic Insights for Dry Reforming of Methane on Cu/Ni Bimetallic Catalysts: DFT-Assisted Microkinetic Analysis for Coke Resistance

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1043
Author(s):  
Ahmed Omran ◽  
Sun Hee Yoon ◽  
Murtaza Khan ◽  
Minhaj Ghouri ◽  
Anjaneyulu Chatla ◽  
...  
Keyword(s):  
Energy Barrier ◽  
Density Functional ◽  
Carbon Deposition ◽  
Bimetallic Catalyst ◽  
Dry Reforming ◽  
Coke Deposition ◽  
Dry Reforming Of Methane ◽  
Catalyst Stability ◽  
Effect Of Temperature ◽  
Elimination Mechanism

Density functional theory (DFT) calculations have been utilized to evaluate the complete reaction mechanism of methane dry reforming (DRM) over Ni2Cu (111) bimetallic catalyst. The detailed catalytic cycle on Ni2Cu (111) catalyst demonstrated superior coke resistance compared to pure Ni (111) and Ni2Fe (111) reported in the literature. Doping Cu in the Ni–Ni network enhanced the competitive CH oxidation by both atomic O and OH species with the latter having only 0.02 eV higher than the 1.06 eV energy barrier required for CH oxidation by atomic O. Among the C/CH oxidation pathways, C* + O* → CO (g) was the most favorable with an energy barrier of 0.72 eV. This was almost half of the energy barrier required for the rate-limiting step of CH decomposition (1.40 eV) and indicated enhanced coke deposition removal. Finally, we investigated the effect of temperature (800~1000 K) on the carbon deposition and elimination mechanism over Ni2Cu (111) catalyst. Under those realistic DRM conditions, the calculations showed a periodic cycle of simultaneous carbon deposition and elimination resulting in improved catalyst stability.

scholarly journals Dry Reforming of Methane over a Ruthenium/Carbon Nanotube Catalyst

2020 ◽  
Vol 4 (1) ◽  
pp. 16
Author(s):  
Yuan Zhu ◽  
Kun Chen ◽  
Robert Barat ◽  
Somenath Mitra
Keyword(s):  
Carbon Nanotube ◽  
Kinetic Model ◽  
Packed Bed ◽  
Dry Reforming ◽  
Gas Analysis ◽  
Packed Bed Reactor ◽  
Coke Deposition ◽  
Dry Reforming Of Methane ◽  
Reverse Water Gas Shift ◽  
Water Gas

In this study, CH4 dry reforming was demonstrated on a novel microwave-synthesized ruthenium (Ru)/carbon nanotube (CNT) catalyst. The catalyst was tested in an isothermal laboratory-packed bed reactor, with gas analysis by gas chromatography/thermal conductivity detection. The catalyst demonstrated excellent dry-reforming activity at modest temperatures (773–973 K) and pressure (3.03 × 105 Pa). Higher reaction temperatures favored increased conversion of CH4 and CO2, and increased H2/CO product ratios. Slight coke deposition, estimated by carbon balance, was observed at higher temperatures and higher feed CH4/CO2. A robust global kinetic model composed of three reversible reactions—dry reforming, reverse water gas shift, and CH4 decomposition—simulates observed outlet species concentrations and reactant conversions using this Ru/CNT catalyst over the temperature range of this study. This engineering kinetic model for the Ru/CNT catalyst predicts a somewhat higher selectivity and yield for H2, and less for CO, in comparison to previously published results for a similarly prepared Pt_Pd/CNT catalyst from our group.

Methane Dry Reforming over Ni-Co/Al2O3: Kinetic Modelling in a Catalytic Fixed-bed Reactor

2017 ◽  
Vol 15 (6) ◽  
Author(s):  
Yacine Benguerba ◽  
Mirella Virginie ◽  
Christine Dumas ◽  
Barbara Ernst
Keyword(s):  
Catalyst Deactivation ◽  
Kinetic Modelling ◽  
Fixed Bed ◽  
Dry Reforming ◽  
Fixed Bed Reactor ◽  
Coke Deposition ◽  
Dry Reforming Of Methane ◽  
Reactor Model ◽  
Reverse Water Gas Shift ◽  
Different Temperatures

Abstract The dry reforming of CH4 was investigated in a catalytic fixed-bed reactor to produce hydrogen at different temperatures over supported bimetallic Ni-Co catalyst. The reactor model for the dry reforming of methane used a set of kinetic models: The Zhang et al model for the dry reforming of methane (DRM); the Richardson-Paripatyadar model for the reverse water gas shift (RWGS); and the Snoeck et al kinetics for the coke-deposition and gasification reactions. The effect of temperatures on the performance of the reactor was studied. The amount of each species consumed or/and produced were calculated and compared with the experimental determined ones. It was showed that the set of kinetic model used in this work gave a good fit and accurately predict the experimental observed profiles from the fixed bed reactor. It was found that reaction-4 and reaction-5 could be neglected which could explain the fact that this catalyst coked rapidly comparatively with other catalyst. The use of large amount of Ni-Co will lead to carbon deposition and so to the catalyst deactivation.

Influence of the microstructure on the catalytic properties of SOFC anodes under dry reforming of methane

2016 ◽  
Vol 164 ◽  
pp. 312-315 ◽  
Author(s):  
A. Lanzini ◽  
C. Guerra ◽  
P. Leone ◽  
M. Santarelli ◽  
F. Smeacetto ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Dry Reforming ◽  
Dry Reforming Of Methane

scholarly journals Can Ultrasound or pH Influence Pd Distribution on the Surface of HAP to Improve Its Catalytic Properties in the Dry Reforming of Methane?

2017 ◽  
Vol 147 (8) ◽  
pp. 2200-2208 ◽  
Author(s):  
Joanna Kamieniak ◽  
Elena Bernalte ◽  
Aidan M. Doyle ◽  
Peter J. Kelly ◽  
Craig E. Banks
Keyword(s):  
Catalytic Properties ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ph Influence
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