A potential descriptor for the CO2 hydrogenation to CH4 over Al2O3 supported Ni and Ni-based alloy catalysts

Ray, K.K.; Deo, Goutam

doi:10.1016/j.apcatb.2017.07.009

Cited by 101 publications

(74 citation statements)

References 70 publications

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“…Nevertheless, the first peak of 12Ni12Fe was similar with 12Ni while the second peak was split into two peaks. This indicates that adding a suitable amount of Fe can weaken the interaction between Ni and support as presented previously and reducible iron species can assist in lowering the reduction temperature of the Ni‐Fe/Al 2 O 3 samples . However, adding too much Fe destroys this role and also introduces Fe oxide species aggregated on 12Ni12Fe.…”

Section: Resultsmentioning

confidence: 51%

Promotion effect of additive Fe on Al₂O₃ supported Ni catalyst for CO₂ methanation

Zhao

Zhang

2018

Applied Organom Chemis

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In this paper, the effect of additive Fe on Ni/Al 2 O 3 catalyst for CO 2 methanation was studied. A series of bimetallic Ni-Fe catalysts with different Ni/Fe ratios were prepared by impregnation method. For comparison, monometallic Fe-based and Ni-based catalysts were also prepared by the same method. The characterization results showed that adding Fe to Ni catalyst on the premise of a low Ni loading(≦12 wt.%) enhanced CO 2 methanation performance.However, when the Ni loading reached 12 wt.%, the catalytic activity decreased with the increase of Fe content, but still higher than the corresponding Ni-based catalyst without Fe. Among them, the 12Ni3Fe catalyst exhibited the highest CO 2 conversion of 84.3 % and nearly 100% CH 4 selectivity at 50000 ml g -1 h -1 and 420°C. The enhancement effect of adding Fe on CO 2 methanation was attributed to the dual effect of suitable electronic environment and increased reducibility generated by Fe species.

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Section: Resultsmentioning

confidence: 51%

Promotion effect of additive Fe on Al₂O₃ supported Ni catalyst for CO₂ methanation

Zhao

Zhang

2018

Applied Organom Chemis

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“…CO 2 methanation nickel catalysts have been studied using different supports, and the most studied are alumina,,,,, pure ceria, ceria‐zirconia mixed oxides,, silica, titania and zirconia among others . The role of the support in the catalytic activity has been related with the dispersion of nickel, with the influence in the reducibility of the nickel oxide species due to the metal‐support interaction and with the CO 2 chemisorption capacity …”

Section: Introductionmentioning

confidence: 99%

“…Despite the reaction is known since more than 100 years ago, scientists are paying more attention to this process in the last decade [6][7][8][9][10][11][12][13][14][15] because it has been identified as a potential route to valorize CO 2 emissions, yielding a valuable fuel.…”

Section: Introductionmentioning

confidence: 99%

“…[36][37][38][39][40][41][42] Noble metal catalysts are able to operate at lower temperature than nickel catalysts, but the prize of noble metals is much higher and nickel catalysts are a promising option for mild temperature. CO 2 methanation nickel catalysts have been studied using different supports, and the most studied are alumina, [8,10,15,37,[39][40][41] pure ceria, [10] ceria-zirconia mixed oxides, [11,39] silica, [12] titania [10] and zirconia [38] among others. [43][44][45] The role of the support in the catalytic activity has been related with the dispersion of nickel, with the influence in the reducibility of the nickel oxide species due to the metal-support interaction and with the CO 2 chemisorption capacity.…”

Section: Introductionmentioning

confidence: 99%

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Ni/LnOx Catalysts (Ln=La, Ce or Pr) for CO₂ Methanation

et al. 2018

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The effect of the LnOx support has been studied for Ni‐based CO2 methanation catalysts. 10 wt.% nickel catalysts with LaOx, CeO2 and PrOx supports have been prepared, characterized by N2 adsorption, XRD, XRF, TG‐MS (N2‐TPD and H2‐TPR) and XPS, and have been tested for CO2 methanation. The catalytic activity follows the trend Ni/CeO2>Ni/PrOx≫Ni/LaOx, all catalysts being very selective towards CH4 formation. The activity depends both on the nature of the catalytic active sites and on the stability of the surface CO2 and H2O species. Ni/CeO2 is the most active catalyst because (i) the Ni2+‐ceria interaction leads to the formation of the highest population of active sites for CO2 dissociation, (ii) the reduced Ni0 sites where H2 dissociation takes place are the most electronegative and active, and (iii) the stability of surface CO2 and H2O species is lowest. Ni/LaOx achieves lower activity because of the strong chemisorption of H2O and CO2, which poison the catalyst surface, and because this support is not able to promote the formation of highly active sites for CO2 and H2 dissociation. The behavior of Ni/PrOx is intermediate, being slightly lower to that of Ni/CeO2 because the formation of active sites is not so efficient and because the stability of chemisorbed CO2 is slightly higher.

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“…It is well-known that the D-band center model has played a crucial role in the adsorption ability and reaction activation energy [39][40][41] . It is one of the indicators to evaluate the catalytic effect [42][43][44][45][46][47] . Specifically, the effect of strain on the reactivity of the surface of catalyst can induce a shift in the metal D-band center.…”

Section: Introductionmentioning

confidence: 99%

Strain engineering the D-band center for Janus MoSSe edge: Nitrogen fixation

Tang

Wei

Liu

et al. 2019

Journal of Energy Chemistry

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A potential descriptor for the CO2 hydrogenation to CH4 over Al2O3 supported Ni and Ni-based alloy catalysts

Cited by 101 publications

References 70 publications

Promotion effect of additive Fe on Al₂O₃ supported Ni catalyst for CO₂ methanation

Promotion effect of additive Fe on Al₂O₃ supported Ni catalyst for CO₂ methanation

Ni/LnOx Catalysts (Ln=La, Ce or Pr) for CO₂ Methanation

Strain engineering the D-band center for Janus MoSSe edge: Nitrogen fixation

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A potential descriptor for the CO2 hydrogenation to CH4 over Al2O3 supported Ni and Ni-based alloy catalysts

Cited by 101 publications

References 70 publications

Promotion effect of additive Fe on Al2O3 supported Ni catalyst for CO2 methanation

Promotion effect of additive Fe on Al2O3 supported Ni catalyst for CO2 methanation

Ni/LnOx Catalysts (Ln=La, Ce or Pr) for CO2 Methanation

Strain engineering the D-band center for Janus MoSSe edge: Nitrogen fixation

Contact Info

Product

Resources

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Promotion effect of additive Fe on Al₂O₃ supported Ni catalyst for CO₂ methanation

Promotion effect of additive Fe on Al₂O₃ supported Ni catalyst for CO₂ methanation

Ni/LnOx Catalysts (Ln=La, Ce or Pr) for CO₂ Methanation