Methane dry reforming over hydrotalcite-derived Ni–Mg–Al mixed oxides: the influence of Ni content on catalytic activity, selectivity and stability

2016 ◽  
Vol 6 (17) ◽  
pp. 6705-6715 ◽  
Author(s):  
Radosław Dębek ◽  
Monika Motak ◽  
Dorota Duraczyska ◽  
Franck Launay ◽  
Maria Elena Galvez ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Mixed Oxides ◽  
Dry Reforming ◽  
Methane Dry Reforming ◽  
Ni Content

Ni-containing hydrotalcite-derived catalysts were prepared using different Ni loadings (from ca. 4 to 60 wt%) at the same MII/MIII ratio equal to 3.

scholarly journals Nickel-Containing Ceria-Zirconia Doped with Ti and Nb. Effect of Support Composition and Preparation Method on Catalytic Activity in Methane Dry Reforming

Nanomaterials ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1281
Author(s):  
Mikhail Simonov ◽  
Yulia Bespalko ◽  
Ekaterina Smal ◽  
Konstantin Valeev ◽  
Valeria Fedorova ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Structural Changes ◽  
Preparation Method ◽  
Diffuse Reflectance Spectroscopy ◽  
Fluorite Structure ◽  
Lattice Parameter ◽  
Dry Reforming ◽  
Fluorite Phase ◽  
Methane Dry Reforming ◽  
Supercritical Synthesis

Nickel-containing mixed ceria-zirconia oxides also doped by Nb and Ti have been prepared by a citrate route and by original solvothermal continuous flow synthesis in supercritical alcohols. Nickel was subsequently deposited by conventional insipient wetness impregnation. The oxides are comprised of ceria-zirconia solid solution with cubic fluorite phase. Negligible amounts of impurities of zirconia are observed for samples prepared by citrate route and doped by Ti. Supports prepared by supercritical synthesis are single-phased. XRD data, Raman, and UV-Vis DR (diffuse reflectance) spectroscopy suggest increasing lattice parameter and amount of oxygen vacancies in fluorite structure after Nb and Ti incorporation despite of the preparation method. These structural changes correlate with the catalytic activity in a methane dry reforming reaction. Catalysts synthesized under supercritical conditions are more active than the catalysts of the same composition prepared by the citrate route. The catalytic activity of samples doped with Ti and Nb is two times higher in terms of TOF (turnover frequency) and increased stability of these catalysts is attributed with the highest oxygen mobility being crucial for gasification of coke precursors.

Ce0.70La0.20Ni0.10O2-δ catalyst for methane dry reforming: Influence of reduction temperature on the catalytic activity and stability

2017 ◽  
Vol 218 ◽  
pp. 779-792 ◽  
Author(s):  
Lidia Pino ◽  
Cristina Italiano ◽  
Antonio Vita ◽  
Massimo Laganà ◽  
Vincenzo Recupero
Keyword(s):  
Catalytic Activity ◽  
Dry Reforming ◽  
Reduction Temperature ◽  
Methane Dry Reforming

scholarly journals Production of CO-rich Hydrogen Gas from Methane Dry Reforming over Co/CeO2 Catalyst

2016 ◽  
Vol 11 (2) ◽  
pp. 210 ◽  
Author(s):  
Bamidele V. Ayodele ◽  
Maksudur R. Khan ◽  
Chin Kui Cheng
Keyword(s):  
Catalytic Activity ◽  
Fixed Bed ◽  
Dry Reforming ◽  
Hydrogen Gas ◽  
Fixed Bed Reactor ◽  
Feed Ratio ◽  
X Ray Diffraction ◽  
Methane Dry Reforming ◽  
X Ray ◽  
Adsorption Desorption

<p>Production of CO-rich hydrogen gas from methane dry reforming was investigated over CeO<sub>2</sub>-supported Co catalyst. The catalyst was synthesized by wet impregnation and subsequently characterized by field emission scanning electron microscope (FESEM), energy dispersion X-ray spectroscopy (EDX), liquid N<sub>2</sub> adsorption-desorption, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) for the structure, surface and thermal properties. The catalytic activity test of the Co/CeO<sub>2</sub> was investigated between 923-1023 K under reaction conditions in a stainless steel fixed bed reactor. The composition of the products (CO<sub>2</sub> and H<sub>2</sub>) from the methane dry reforming reaction was measured by gas chromatography (GC) coupled with thermal conductivity detector (TCD). The effects of feed ratios and reaction temperatures were investigated on the catalytic activity toward product selectivity, yield, and syngas ratio. Significantly, the selectivity and yield of both H<sub>2</sub> and CO increases with feed ratio and temperature. However, the catalyst shows higher activity towards CO selectivity. The highest H<sub>2</sub> and CO selectivity of 19.56% and 20.95% respectively were obtained at 1023 K while the highest yield of 41.98% and 38.05% were recorded for H<sub>2</sub> and CO under the same condition. Copyright © 2016 BCREC GROUP. All rights reserved</p><p><em>Received: 21<sup>st</sup> January 2016; Revised: 23<sup>rd</sup> February 2016; Accepted: 23<sup>rd</sup> February 2016</em></p><p><strong>How to Cite:</strong> Ayodele, B.V., Khan, M.R., Cheng, C. K. (2016). Production of CO-rich Hydrogen Gas from Methane Dry Reforming over Co/CeO<sub>2</sub> Catalyst. <em>Bulletin of Chemical Reaction Engineering &amp; Catalysi</em>s, 11 (2): 210-219 (doi:10.9767/bcrec.11.2.552.210-219)</p><p><strong>Permalink/DOI:</strong> http://dx.doi.org/10.9767/bcrec.11.2.552.210-219</p>

An Overview of Reforming Technologies and the Effect of Parameters on the Catalytic Performance of Mesoporous Silica/Alumina Supported Nickel Catalysts for Syngas Production by Methane Dry Reforming

2020 ◽  
Vol 13 (4) ◽  
pp. 303-322
Author(s):  
M.A. Saad ◽  
N.H. Abdurahman ◽  
Rosli Mohd Yunus ◽  
Mohammed Kamil ◽  
Omar I. Awad
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Nickel Catalysts ◽  
Catalytic Performance ◽  
Dry Reforming ◽  
Future Research ◽  
Methane Dry Reforming ◽  
Syngas Production ◽  
Silica Alumina ◽  
Supported Nickel Catalysts

Synthetic gas - a combination of (H2) and (CO) - is an important chemical intermediate for the production of liquid hydrocarbon, olefin, gasoline, and other valuable chemicals. Several reforming methods that use steam, carbon dioxide, and oxygen in the presence of various catalytic systems have been extensively investigated, and this paper reviews the recent research on the state-of-the-art of reforming technologies and the effect of parameters on the catalytic activity of mesoporous silica/alumina supported nickel catalysts for syngas production by methane dry reforming. First, we provide an overview of reforming technologies, including methane dry reforming, steam methane reforming, partial oxidation of CH4, and auto thermal reforming of CH4. Then, we review the literature on dry reforming catalysts. Next, we describe recent findings on the effect of parameters on the catalytic activity of mesoporous silica/alumina supported nickel catalysts for syngas production. Finally, we make proposals for future research. This study can help achieve a better understanding of the reforming technologies and the effects of parameters on catalytic performance for syngas production, thus contributing to the development of green technologies.

Nickel based catalysts for methane dry reforming: Effect of supports on catalytic activity and stability

2019 ◽  
Vol 44 (52) ◽  
pp. 28065-28076 ◽  
Author(s):  
Cristina Pizzolitto ◽  
Eva Pupulin ◽  
Federica Menegazzo ◽  
Elena Ghedini ◽  
Alessandro Di Michele ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Dry Reforming ◽  
Methane Dry Reforming

An investigation on the influence of catalyst composition, calcination and reduction temperatures on Ni/MgO catalyst for dry reforming of methane

RSC Advances ◽  
2016 ◽  
Vol 6 (94) ◽  
pp. 91603-91616 ◽  
Author(s):  
Muhammad Usman ◽  
W. M. A. Wan Daud
Keyword(s):  
Catalytic Activity ◽  
Space Velocity ◽  
Dry Reforming ◽  
Dry Reforming Of Methane ◽  
Catalyst Composition ◽  
Ni Content ◽  
High Space ◽  
Very High ◽  
High Space Velocity

Catalytic activity of Ni/MgO catalyst investigated at different Ni content (20, 40 and 80 wt%), calcination (450, 600 and 800 °C) and reduction temperatures (550 and 800 °C) for dry reforming reaction at very high space velocity.

Study of nickel-molybdenum catalysts for methanation of carbon monoxide

1980 ◽  
Vol 45 (3) ◽  
pp. 783-790 ◽  
Author(s):  
Petr Taras ◽  
Milan Pospíšil
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Mixed Oxides ◽  
Minor Component ◽  
Fast Neutrons ◽  
Scanning Calorimetry ◽  
Low Concentrations ◽  
Γ Rays ◽  
Molybdenum Catalysts ◽  
Kinetics Of

Catalytic activity of nickel-molybdenum catalysts for methanation of carbon monoxide and hydrogen was studied by means of differential scanning calorimetry. The activity of NiMoOx systems exceeds that of carrier-free nickel if x < 2, and is conditioned by the oxidation degree of molybdenum, changing in dependence on the composition in the region Mo-MoO2. The activity of the catalysts is adversely affected by irradiation by fast neutrons, dose 28.1 Gy, or by γ rays using doses in the region 0.8-52 kGy. The system is most susceptible to irradiation in the region of low concentrations of the minor component (about 1 mol.%). The dependence of changes in catalytic activity of γ-irradiated samples on the dose exhibits a maximum in the range of 2-5 kGy. The changes in catalytic activity are stimulated by the change of reactivity of the starting mixed oxides, leading to different kinetics of their reduction and modification of their adsorption properties. The irradiation of the catalysts results in lowered concentration of the active centres for the methanation reaction.

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