Activities of Ni-based nano catalysts for CO2–CH4 reforming prepared by polyol process

Naeem, Muhammad Awais; Al‐Fatesh, Ahmed S.; Abasaeed, Ahmed E.; Fakeeha, Anis H.

doi:10.1016/j.fuproc.2014.01.035

Cited by 65 publications

(30 citation statements)

References 48 publications

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“…CH 4 and CO 2 conversion of 25% and 11.3%, respectively, was achieved with 15% Ni/γ‐Al 2 O 3 ‐packed DBD at SIE 4.8 J mL −1 . This is mainly due to the smaller particle size and higher surface area of 15Ni/γ‐Al 2 O 3 , which provides more active sites, large contact area, and higher number of filamentary microdischarges . On the same note, the low conversion obtained over 15Ni/ZSM‐5 may be due to its low‐dielectric nature, lowest charge transfers per half cycle, and large Ni particles

([\bar{d}] = 22 mm)

.…”

Section: Resultsmentioning

confidence: 99%

Dry Reforming of Methane in DBD Plasma over Ni‐Based Catalysts: Influence of Process Conditions and Support on Performance and Durability

et al. 2019

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The conversion of greenhouse gases, H2 and CO selectivity, H2/CO ratio, and carbon formation in the dry reforming reaction over Ni‐supported ZSM‐5, Al2O3, and TiO2 are tested under thermal, plasma, and plasma–thermal conditions. It is observed that the dielectric nature, specific surface area, and acid‐base properties of the support influence the performance during the DRM reaction. Typical results indicate that the best activity and syngas yield are achieved with 15Ni/Al2O3 under plasma conditions, possibly due to the high dielectric constant and surface area of Al2O3 and nanosize of Ni. In the thermal condition, the highest conversion of 73% and 68% for CH4 and CO2, respectively, is achieved over 15Ni/ZSM‐5 at 500 °C. Plasma‐assisted thermal conditions provide the highest conversion due to the activation of reactants and their partial conversion in the plasma zone before entering into the catalytic zone. The plasma‐assisted thermocatalytic conversions of CH4 and CO2 reach the best values of 76% and 71%, respectively, on 15Ni/ZSM‐5. Under the same conditions, 68% and 65% conversion of CH4 and CO2, respectively, is achieved with 15Ni/Al2O3 where the selectivity for H2 and CO is 45% and 58%, respectively.

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([\bar{d}] = 22 mm)

.…”

Section: Resultsmentioning

confidence: 99%

Dry Reforming of Methane in DBD Plasma over Ni‐Based Catalysts: Influence of Process Conditions and Support on Performance and Durability

et al. 2019

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“…Naeem et al [17] 353 have found a severe deactivation on the catalyst from carbon deposition. Encapsulation carbon on 354 metal particles significantly decreased catalytic activity but filamentous carbon with metal particles…”

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confidence: 99%

“…The catalyst obtained via ammonia evaporation method had stronger metal−support interaction and better nickel dispersion compared to that obtained via conventional impregnation. Naeem et al [17] have found a severe deactivation on the catalyst from carbon deposition. Encapsulation carbon on metal particles significantly decreased catalytic activity but filamentous carbon with metal particles being on the top of the carbon could be still active and exposed by reactants.…”

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confidence: 99%

Investigation of Ni/SiO2 Fiber Catalysts Prepared by Different Methods on Hydrogen production from Ethanol Steam Reforming

et al. 2018

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Ni/SiO 2 (Ni/SF) catalysts were prepared by electrospinning of the SF followed by impregnation. The performance of the Ni/SF catalysts for hydrogen production from ethanol steam reforming at various conditions was investigated in comparison with a conventional Ni/silica porous (Ni/SP) catalyst. The influence of the Ni/SF catalyst preparation methods on the catalytic activity and stability in ethanol steam reforming was also studied. The catalysts were prepared by three different preparation techniques: impregnation (IM), deposition precipitation (DP) and strong electrostatic adsorption (SEA). The Ni/SF catalyst exhibited higher performances and stability than the Ni/SP catalyst. The H 2 yields of 55% and 47% were achieved at 600 • C using the Ni/SF and Ni/SP catalysts, respectively. The preparation methods had a significant effect on the catalytic activity and stability of the Ni/SF catalyst, where that prepared by the SEA method had a smaller Ni particle size and higher dispersion, and also exhibited the highest catalytic activity and stability compared to the Ni/SF catalysts prepared by IM and DP methods. The maximum H 2 yield produced from the catalyst prepared by SEA was 65%, while that from the catalysts prepared by DP and IM were 60% and 55%, respectively, under the same conditions. The activity of the fiber catalysts prepared by SEA, DP and IM remained almost constant at all times during a 16 h stability test.

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“…Generally, carbon deposition and sintering of active metal component are the major reasons that alter the textural properties of the catalyst during DRM reaction. 29 However, it is apparent that the Sc-promoted catalysts presented a relatively smaller variation in S BET and PV in comparison to non-promoted catalyst. This important observation signifies that, under similar reaction conditions, the Sc-promoted catalysts showed better resistance toward carbon deposition and sintering than non-promoted catalyst.…”

Section: Temperature-programmed Reduction (H 2 -Tpr)mentioning

confidence: 97%

The Effect of Sc Promoter on the Performance of Co/TiO₂–P25 Catalyst in Dry Reforming of Methane

Al‐Fatesh

Naeem

Fakeeha

et al. 2015

Bulletin Korean Chem Soc

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In the present work, the effect of scandium (Sc) promoter on the performance of Co/TiO 2 -P25 catalyst in dry reforming of methane has been investigated. The catalysts were prepared by the incipient wet impregnation technique. For each catalyst, the Co loading was fixed at 5 wt %, while the Sc loading was varied from 0.0 to 2.0 wt %. The experiments were carried out at atmospheric pressure in a micro tubular reactor at a temperature of 700 C. For better understanding and comparison, the catalysts were characterized by various techniques such as Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), H 2 -temperature-programmed reduction (TPR), CO 2 -temperature-programmed desorption (TPD), and thermogravimetric analyses (TGA). The results revealed that the promotion of Co/TiO 2 -P25 catalyst with Sc has a significant impact on its catalytic performance and the amount of carbon deposition. The doping of Co/TiO 2 -P25 catalyst with Sc improves the basicity and enhances the metal support interaction in the catalyst. At higher Sc loading, Co metal oxidation became substantial that triggered severe catalyst deactivation. Amongst all Sc-promoted catalysts, 0.75 wt % Sc-promoted catalyst exhibited the highest CH 4 and CO 2 activity with minimum deactivation.

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Activities of Ni-based nano catalysts for CO2–CH4 reforming prepared by polyol process

Cited by 65 publications

References 48 publications

Dry Reforming of Methane in DBD Plasma over Ni‐Based Catalysts: Influence of Process Conditions and Support on Performance and Durability

Dry Reforming of Methane in DBD Plasma over Ni‐Based Catalysts: Influence of Process Conditions and Support on Performance and Durability

Investigation of Ni/SiO2 Fiber Catalysts Prepared by Different Methods on Hydrogen production from Ethanol Steam Reforming

The Effect of Sc Promoter on the Performance of Co/TiO₂–P25 Catalyst in Dry Reforming of Methane

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Activities of Ni-based nano catalysts for CO2–CH4 reforming prepared by polyol process

Cited by 65 publications

References 48 publications

Dry Reforming of Methane in DBD Plasma over Ni‐Based Catalysts: Influence of Process Conditions and Support on Performance and Durability

Dry Reforming of Methane in DBD Plasma over Ni‐Based Catalysts: Influence of Process Conditions and Support on Performance and Durability

Investigation of Ni/SiO2 Fiber Catalysts Prepared by Different Methods on Hydrogen production from Ethanol Steam Reforming

The Effect of Sc Promoter on the Performance of Co/TiO2–P25 Catalyst in Dry Reforming of Methane

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The Effect of Sc Promoter on the Performance of Co/TiO₂–P25 Catalyst in Dry Reforming of Methane