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.

scholarly journals Dry Reforming of Methane over CNT-Supported CeZrO2, Ni and Ni-CeZrO2 Catalysts

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 741
Author(s):  
Agata Łamacz ◽  
Paulina Jagódka ◽  
Michalina Stawowy ◽  
Krzysztof Matus
Keyword(s):  
Dry Reforming ◽  
Water Gas Shift ◽  
Dry Reforming Of Methane ◽  
Water Gas Shift Reaction ◽  
Catalyst Composition ◽  
Co2 Consumption ◽  
Reverse Water Gas Shift ◽  
Shift Reaction ◽  
Water Gas ◽  
First Time

In this work, the carbon nanotubes (CNT)-supported nanosized, well-dispersed, CeZrO2 and Ni-CeZrO2 catalysts were obtained and tested for the first time in the reaction of methane dry reforming (DRM). The performance of the hybrid materials was compared with the performance of Ni/CNT catalyst. The mechanism of the DRM reaction and the occurrence of reverse water gas shift reaction (RWGS) and CO2 deoxidation were discussed in terms of catalysts composition. The contribution of RWGS and CO2 deoxidation in the DRM process, demonstrating an increased CO2 consumption when compared to CH4, and H2/CO < 1, varied depending on the catalyst composition, was also studied.

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.

CO2 green technologies in CO2 capture and direct utilization processes: methanation, reverse water-gas shift, and dry reforming of methane

2020 ◽  
Vol 4 (11) ◽  
pp. 5543-5549
Author(s):  
Seong Bin Jo ◽  
Jin Hyeok Woo ◽  
Jong Heon Lee ◽  
Tae Young Kim ◽  
Hu In Kang ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Dry Reforming ◽  
Water Gas Shift ◽  
Dry Reforming Of Methane ◽  
Green Technologies ◽  
Reverse Water Gas Shift ◽  
Water Gas

CO2 green technologies, such as methanation, reverse water-gas shift (rWGS), and dry reforming of methane (DRM) in CO2 capture and direct utilization process are developed using Ni/CaO catal-sorbents.

scholarly journals Preparation, Characterization, and Activity of Pd/PSS-Modified Membranes in the Low Temperature Dry Reforming of Methane with and without Addition of Extra Steam

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 518
Author(s):  
Cecilia Mateos-Pedrero ◽  
Miguel A. Soria ◽  
Antonio Guerrero-Ruíz ◽  
Inmaculada Rodríguez-Ramos
Keyword(s):  
Low Temperature ◽  
Flow Reactor ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Porous Stainless Steel ◽  
Pd Membrane ◽  
Continuous Flow Reactor ◽  
Oxidation In Air ◽  
H2 Yield ◽  
Water Gas

The external surface of a commercial porous stainless steel (PSS) was modified by either oxidation in air at varying temperatures (600, 700, and 800 °C) or coating with different oxides (SiO2, Al2O3, and ZrO2). Among them, PSS-ZrO2 appears as the most suitable carrier for the synthesis of the Pd membrane. A composite Pd membrane supported on the PSS-ZrO2 substrate was prepared by the electroless plating deposition method. Supported Ru catalysts were first evaluated for the low-temperature methane dry reforming (DRM) reaction in a continuous flow reactor (CR). Ru/ZrO2-La2O3 catalyst was found to be active and stable, so it was used in a membrane reactor (MR), which enhances the methane conversions above the equilibrium values. The influence of adding H2O to the feed of DRM was investigated over a Ru/ZrO2-La2O3 catalyst in the MR. Activity results are compared with those measured in a CR. The addition of H2O into the feed favors other reactions such as Water-Gas Shift (RWGS) and Steam Reforming (SR), which occur together with DRM, resulting in a dramatic decrease of CO2 conversion and CO production, but a marked increase of H2 yield.

Plasma-catalytic dry reforming of methane: Screening of catalytic materials in a coaxial packed-bed DBD reactor

2020 ◽  
Vol 397 ◽  
pp. 125519 ◽  
Author(s):  
J.A. Andersen ◽  
J.M. Christensen ◽  
M. Østberg ◽  
A. Bogaerts ◽  
A.D. Jensen
Keyword(s):  
Packed Bed ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Catalytic Materials ◽  
Dbd Reactor

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”.

scholarly journals CO2 mitigation by carbon nanotube formation during dry reforming of methane analyzed by factorial design combined with response surface methodology

2014 ◽  
Vol 35 (4) ◽  
pp. 514-523 ◽  
Author(s):  
Tiago P. Braga ◽  
Regina C.R. Santos ◽  
Barbara M.C. Sales ◽  
Bruno R. da Silva ◽  
Antônio N. Pinheiro ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Carbon Nanotube ◽  
Factorial Design ◽  
Response Surface ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Co2 Mitigation

Dry Reforming of Methane with Dielectric Barrier Discharge and Ferroelectric Packed-Bed Reactors

2014 ◽  
Vol 28 (12) ◽  
pp. 7621-7631 ◽  
Author(s):  
Wei-Chieh Chung ◽  
Kuan-Lun Pan ◽  
How-Ming Lee ◽  
Moo-Been Chang
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Packed Bed ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Dielectric Barrier ◽  
Packed Bed Reactors
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