Methane dry reforming on Ni/La2Zr2O7 treated by plasma in different atmospheres

Peng, Honggen; Ma, Youhe; Liu, Wenming; Xu, Xianglan; Fang, Xiuzhong; Lian, Jie; Wang, Xiang; Li, Changqing; Zhou, Wufeng; Ping, Yuan

doi:10.1016/j.jechem.2015.06.015

Cited by 47 publications

(18 citation statements)

References 39 publications

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“…In addition, the CO 2 conversion is always higher than the CH 4 conversion at the same temperature, which could be caused by the occurrence of the reversew ater gas shift reac-tion (CO 2 + +H 2 ÐCO+ +H 2 O). [46] Notably,b otht he catalysts show a similar initial activity below 650 8C. However,1 2% Ni@Al 2 O 3 is more active than 12 %N i/Al 2 O 3 above 700 8C, as evidencedb y the higher CH 4 and CO 2 conversions.…”

Section: Activityand Stability Evaluationsupporting

confidence: 70%

“…Both the CH 4 and CO 2 conversions increase with the increase of the reaction temperature. In addition, the CO 2 conversion is always higher than the CH 4 conversion at the same temperature, which could be caused by the occurrence of the reverse water gas shift reaction (CO 2 +H 2 ⇌CO+H 2 O) . Notably, both the catalysts show a similar initial activity below 650 °C.…”

Section: Resultsmentioning

confidence: 94%

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Synthesis of a Highly Active and Stable Nickel‐Embedded Alumina Catalyst for Methane Dry Reforming: On the Confinement Effects of Alumina Shells for Nickel Nanoparticles

et al. 2017

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A 12 % Ni@Al2O3 catalyst was synthesized by using an inverse microemulsion technique and evaluated for the dry reforming of methane (DRM). We used TEM to reveal that the core–shell structure was formed successfully in the 12 % Ni@Al2O3 catalyst, in which the Ni nanoparticle cores with an average grain size around 10 nm are encapsulated by mesoporous Al2O3 shells. In comparison with a 12 % Ni/Al2O3 catalyst prepared by an impregnation method, much smaller Ni grain sizes and higher metallic Ni active surface areas can be achieved in the core–shell catalyst, which was evidenced by using TEM and H2 adsorption–desorption analysis. In addition, a larger amount of active oxygen species was formed on the surface of 12 % Ni@Al2O3 than on 12 % Ni/Al2O3. Importantly, the formation of the core–shell structure in 12 % Ni@Al2O3 can effectively impede the migration of the Ni active species at elevated temperatures, which prevents agglomeration. Consequently, the 12 % Ni@Al2O3 core–shell catalyst shows a remarkable activity and stability and a potent coke resistance during a 50 h durability evaluation at 800 °C for DRM. It is believed that the core–shell structure is the major factor that accounts for the superior DRM performance over that of the 12 % Ni@Al2O3 catalyst, which might open a new way for the design and development of improved catalysts for DRM for hydrogen production.

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Section: Activityand Stability Evaluationsupporting

confidence: 70%

Section: Resultsmentioning

confidence: 94%

Synthesis of a Highly Active and Stable Nickel‐Embedded Alumina Catalyst for Methane Dry Reforming: On the Confinement Effects of Alumina Shells for Nickel Nanoparticles

et al. 2017

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“…Other benecial examples of plasma physical modication of the catalyst surface are provided in literature for various other processes as well. [170][171][172][173][174][175][176] The underlying mechanisms on plasma induced morphological changes on various catalytic materials are studied in detail. It is assumed that trapping of electrons from plasma on the metallic particles creates a thin plasma sheath around it.…”

Section: Plasma Pretreatment Of the Catalystmentioning

confidence: 99%

A review of plasma-assisted catalytic conversion of gaseous carbon dioxide and methane into value-added platform chemicals and fuels

et al. 2018

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“…between the Ni and SFs that effectively prevented the carbon deposition on the catalysts during the 389 steam reforming reaction [38]. The weight loss percentages of the catalysts were in the sequence: The TG/DTG curves of the spent catalysts are presented in Figure 10.…”

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confidence: 99%

“…Overall, the SF-supported catalysts showed excellent coking resistance. Comparison of the different Ni/SF preparation methods, revealed that the amount of carbon deposition on the Ni/SF-DP and Ni/SF-SEA catalysts were lower than the Ni/SF-IM catalyst, reflecting the stronger interaction between the Ni and SFs that effectively prevented the carbon deposition on the catalysts during the steam reforming reaction [38]. The weight loss percentages of the catalysts were in the sequence: Ni/SP-IM >Ni/SF-IM >Ni/SF-DP > Ni/SF-SEA.…”

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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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Methane dry reforming on Ni/La2Zr2O7 treated by plasma in different atmospheres

Cited by 47 publications

References 39 publications

Synthesis of a Highly Active and Stable Nickel‐Embedded Alumina Catalyst for Methane Dry Reforming: On the Confinement Effects of Alumina Shells for Nickel Nanoparticles

Synthesis of a Highly Active and Stable Nickel‐Embedded Alumina Catalyst for Methane Dry Reforming: On the Confinement Effects of Alumina Shells for Nickel Nanoparticles

A review of plasma-assisted catalytic conversion of gaseous carbon dioxide and methane into value-added platform chemicals and fuels

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

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