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.

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.

Carbon-free dry reforming of methane to syngas over NdCoO3 perovskite-type mixed metal oxide catalyst

2005 ◽  
Vol 100 (3-4) ◽  
pp. 271-276 ◽  
Author(s):  
Vasant R. Choudhary ◽  
Kartick C. Mondal ◽  
Ajit S. Mamman ◽  
Upendra A. Joshi
Keyword(s):  
Metal Oxide ◽  
Oxide Catalyst ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Mixed Metal Oxide ◽  
Metal Oxide Catalyst ◽  
Mixed Metal ◽  
Perovskite Type

Kinetic Assessment of the Dry Reforming of Methane over a Solid Solution Ni–La Oxide Catalyst

2021 ◽  
Author(s):  
Victor Stivenson Sandoval-Bohorquez ◽  
Edgar M. Morales-Valencia ◽  
Carlos Omar Castillo-Araiza ◽  
Luz Marina Ballesteros Rueda ◽  
Víctor Gabriel Baldovino Medrano
Keyword(s):  
Solid Solution ◽  
Active Sites ◽  
Oxide Catalyst ◽  
Bond Cleavage ◽  
Scale Up ◽  
Active Surface ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Nickel Surface ◽  
Kinetics Of

The dry reforming of methane is a promising technology for the abatement of CH<sub>4</sub> and CO<sub>2</sub>. Solid solution Ni–La oxide catalysts are characterized by their long–term stability (100h) when tested at full conversion. The kinetics of dry reforming over this type of catalysts has been studied using both power law and Langmuir–Hinshelwood based approaches. However, these studies typically deal with fitting the net CH<sub>4</sub> rate hence disregarding competing and parallel surface processes and the different possible configurations of the active surface. In this work, we synthesized a solid solution Ni–La oxide catalyst and tested six Langmuir–Hinshelwood mechanisms considering both single and dual active sites for assessing the kinetics of dry reforming and the competing reverse water gas shift reaction and investigated the performance of the derived kinetic models. In doing this, it was found that: (1) all the net rates were better fitted by a single–site model that considered that the first C–H bond cleavage in methane occurred over a <a>metal−oxygen </a>pair site; (2) this model predicted the existence of a nearly saturated nickel surface with chemisorbed oxygen adatoms derived from the dissociation of CO<sub>2</sub>; (3) the dissociation of CO<sub>2</sub> can either be an inhibitory or an irrelevant step, and it can also modify the apparent activation energy for CH<sub>4</sub> activation. These findings contribute to a better understanding of the dry reforming reaction's kinetics and provide a robust kinetic model for the design and scale–up of the process.

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

In situ preparation of Ni nanoparticles in cerium-modified silica aerogels for coking- and sintering-resistant dry reforming of methane

2017 ◽  
Vol 41 (12) ◽  
pp. 4869-4878 ◽  
Author(s):  
Xiaoyuan Zhao ◽  
Meirong Lu ◽  
Hongrui Li ◽  
Jianhui Fang ◽  
Liyi Shi ◽  
...  
Keyword(s):  
Silica Aerogels ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ni Nanoparticles ◽  
Modified Silica ◽  
In Situ Preparation

Ni nanoparticles in nanochannels of cerium-modified silica aerogels were in situ prepared for coking-resistant dry reforming of methane.

scholarly journals Spectroscopic and Kinetic Insights into the Methane Reforming over Ce-pyrochlores

2019 ◽  
Author(s):  
Disha Jain ◽  
Shreya Saha
Keyword(s):  
Noble Metal ◽  
Material Characterization ◽  
Reaction Pathway ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Methane Reforming ◽  
In Situ Ftir ◽  
Ftir Studies ◽  
Surface Intermediates

<p></p><p>In the present study, we have studied the effect of doping of noble metal ions in Ce-pyrochlores for dry reforming of methane (DRM). Two series of noble metal (Pt and Ru) doped pyrochlores i.e. Ce<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> and Ce<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> have been studied. Reducibility of the synthesized samples was measured to understand the interplay between the metal and support. A detailed material characterization was performed both pre-and post-reaction to highlight the changes on the surface of the catalyst. Further, the nature of surface intermediates was investigated by in situ FTIR studies. Based on these experimental insights, a comprehensive reaction pathway was developed and kinetic model was derived.</p><br><p></p>

scholarly journals Effects of Zr Doping into Ceria for the Dry Reforming of Methane over Ni/CeZrO2 Catalysts: In Situ Studies with XRD, XAFS, and AP-XPS

ACS Catalysis ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 3274-3284 ◽  
Author(s):  
Feng Zhang ◽  
Zongyuan Liu ◽  
Xiaobo Chen ◽  
Ning Rui ◽  
Luis E. Betancourt ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
In Situ Studies

scholarly journals Highly Active Ceria-Supported Ru Catalyst for the Dry Reforming of Methane: In Situ Identification of Ruδ+–Ce3+ Interactions for Enhanced Conversion

ACS Catalysis ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 3349-3359 ◽  
Author(s):  
Zongyuan Liu ◽  
Feng Zhang ◽  
Ning Rui ◽  
Xing Li ◽  
Lili Lin ◽  
...  
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Ru Catalyst ◽  
Highly Active

Coke- and sintering-resistant monolithic catalysts derived from in situ supported hydrotalcite-like films on Al wires for dry reforming of methane

Nanoscale ◽  
2013 ◽  
Vol 5 (7) ◽  
pp. 2659 ◽  
Author(s):  
Xianjun Du ◽  
Dengsong Zhang ◽  
Liyi Shi ◽  
Ruihua Gao ◽  
Jianping Zhang
Keyword(s):  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Monolithic Catalysts
Sign in / Sign up

Export Citation Format

Share Document