scholarly journals Molybdenum carbide and oxycarbide from carbon-supported MoO3 nanosheets: phase evolution and DRM catalytic activity assessed by TEM and in situ XANES/XRD methods

Nanoscale ◽  
2020 ◽  
Vol 12 (24) ◽  
pp. 13086-13094 ◽  
Author(s):  
Alexey Kurlov ◽  
Xing Huang ◽  
Evgeniya B. Deeva ◽  
Paula M. Abdala ◽  
Alexey Fedorov ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Molybdenum Carbide ◽  
Phase Evolution ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Carbon Spheres ◽  
In Situ Xanes

Nanosheets of molybdenum(vi) oxide supported on carbon spheres were carburized and utilized for the dry reforming of methane (DRM). A molybdenum oxycarbide phase was identified as active for DRM and characterised by XANES and TEM methods.

scholarly journals Insight into the phase evolution of a NiMgAl catalyst from the reduction stage to the post-reaction stage during the dry reforming of methane

2017 ◽  
Vol 53 (44) ◽  
pp. 6001-6004 ◽  
Author(s):  
Zhenghong Bao ◽  
Yiqiu Zhan ◽  
Jason Street ◽  
Wenqian Xu ◽  
Filip To ◽  
...  
Keyword(s):  
Oxide Catalyst ◽  
Phase Evolution ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Reduction Stage ◽  
Reaction Stage ◽  
Catalyst Reduction ◽  
Insight Into ◽  
Synchrotron Xrd

A NiMgAl oxide catalyst was characterized and analyzed using in situ synchrotron XRD during the catalyst reduction, DRM reaction, and post-reaction.

In-situ synthesis of nickel modified molybdenum carbide catalyst for dry reforming of methane

2011 ◽  
Vol 12 (9) ◽  
pp. 803-807 ◽  
Author(s):  
Anjie Zhang ◽  
Aimin Zhu ◽  
Bingbing Chen ◽  
Shaohua Zhang ◽  
Chaktong Au ◽  
...  
Keyword(s):  
Molybdenum Carbide ◽  
Dry Reforming ◽  
In Situ Synthesis ◽  
Dry Reforming Of Methane

scholarly journals Performance Analysis of TiO2-Modified Co/MgAl2O4 Catalyst for Dry Reforming of Methane in a Fixed Bed Reactor for Syngas (H2, CO) Production

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3347
Author(s):  
Arslan Mazhar ◽  
Asif Hussain Khoja ◽  
Abul Kalam Azad ◽  
Faisal Mushtaq ◽  
Salman Raza Naqvi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Fixed Bed ◽  
Catalytic Performance ◽  
Dry Reforming ◽  
Fixed Bed Reactor ◽  
Dry Reforming Of Methane ◽  
Catalyst Stability ◽  
Feed Ratio ◽  
Catalyst Loading ◽  
Impregnation Method

Co/TiO2–MgAl2O4 was investigated in a fixed bed reactor for the dry reforming of methane (DRM) process. Co/TiO2–MgAl2O4 was prepared by modified co-precipitation, followed by the hydrothermal method. The active metal Co was loaded via the wetness impregnation method. The prepared catalyst was characterized by XRD, SEM, TGA, and FTIR. The performance of Co/TiO2–MgAl2O4 for the DRM process was investigated in a reactor with a temperature of 750 °C, a feed ratio (CO2/CH4) of 1, a catalyst loading of 0.5 g, and a feed flow rate of 20 mL min−1. The effect of support interaction with metal and the composite were studied for catalytic activity, the composite showing significantly improved results. Moreover, among the tested Co loadings, 5 wt% Co over the TiO2–MgAl2O4 composite shows the best catalytic performance. The 5%Co/TiO2–MgAl2O4 improved the CH4 and CO2 conversion by up to 70% and 80%, respectively, while the selectivity of H2 and CO improved to 43% and 46.5%, respectively. The achieved H2/CO ratio of 0.9 was due to the excess amount of CO produced because of the higher conversion rate of CO2 and the surface carbon reaction with oxygen species. Furthermore, in a time on stream (TOS) test, the catalyst exhibited 75 h of stability with significant catalytic activity. Catalyst potential lies in catalyst stability and performance results, thus encouraging the further investigation and use of the catalyst for the long-run DRM process.

Ultra‐Small Molybdenum Carbide Nanoparticles in situ Entrapped in Mesoporous Carbon Spheres as Efficient Catalysts for Hydrogen Evolution

ChemCatChem ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2643-2648 ◽  
Author(s):  
Shisheng Yuan ◽  
Shaonan Xu ◽  
Zhipeng Liu ◽  
Guoqing Huang ◽  
Cong Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Mesoporous Carbon ◽  
Molybdenum Carbide ◽  
Carbon Spheres

In-situ Co-Precipitation of Ni-Mg-Al-LDH Catalytic Precursor on γ-Al2O3 for Dry Reforming of Methane: Synthesis and Evaluation

2015 ◽  
Vol 31 (5) ◽  
pp. 948-954 ◽  
Author(s):  
ZHANG Xiao-Qing ◽  
◽  
XU Yan YAN ◽  
YANG Chun-Hui ◽  
ZHANG Yan-Ping ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Co Precipitation

scholarly journals Evaluation of a Catalyst Durability in Absence and Presence of Toluene Impurity: Case of the Material Co2Ni2Mg2Al2 Mixed Oxide Prepared by Hydrotalcite Route in Methane Dry Reforming to Produce Energy

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1362
Author(s):  
Carole Tanios ◽  
Cédric Gennequin ◽  
Madona Labaki ◽  
Haingomalala Lucette Tidahy ◽  
Antoine Aboukaïs ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mixed Oxide ◽  
Active Sites ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Side Reactions ◽  
Commercial Catalyst ◽  
Catalytic Sites ◽  
Catalyst Durability ◽  
Catalytic Performances

Ni, Co, Mg, and Al mixed-oxide solids, synthesized via the hydrotalcite route, were investigated in previous works toward the dry reforming of methane for hydrogen production. The oxide Co2Ni2Mg2Al2 calcined at 800 °C, Co2Ni2Mg2Al2800, showed the highest catalytic activity in the studied series, which was ascribable to an interaction between Ni and Co, which is optimal for this Co/Ni ratio. In the present study, Co2Ni2Mg2Al2800 was compared to a commercial catalyst widely used in the industry, Ni(50%)/Al2O3, and showed better activity despite its lower number of active sites, as well as lower amounts of carbon on its surface, i.e. less deactivation. In addition to this, Co2Ni2Mg2Al2800 showed stability for 20 h under stream during the dry reforming of methane. This good durability is attributed to a periodic cycle of carbon deposition and removal as well as to the strong interaction between Ni and Co, preventing the deactivation of the catalyst. The evaluation of the catalytic performances in the presence of toluene, which is an impurity that exists in biogas, is also a part of this work. In the presence of toluene, the catalytic activity of Co2Ni2Mg2Al2800 decreases, and higher carbon formation on the catalyst surface is detected. Toluene adsorption on catalytic sites, side reactions performed by toluene, and the competition between toluene and methane in the reaction with carbon dioxide are the main reasons for such results.

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