Dry reforming of methane over LnFe0.7Ni0.3O3−δ perovskites: Influence of Ln nature

Kapokova, L. G.; Pavlova, Svetlana; Bunina, R. V.; Alikina, G. M.; Krieger, Tamara; Ищенко, А. В.; Rogov, Vladimir A.; Sadykov, Vladіslav

doi:10.1016/j.cattod.2010.10.086

Cited by 51 publications

(43 citation statements)

References 19 publications

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“…The BET specific surface areas of perovskites are in the range of 3-10 m 2 /g which are comparable with the usual values obtained for such systems [20][21][24][25][26].…”

Section: Structural and Textural Featuressupporting

confidence: 71%

“…The first series was PrFe 1-x Ni(Co) x O 3 (x=0.3-0.4) perovskites prepared by modified Pechini route using metal (Me) nitrates, citric acid (CA), ethylene glycol (EG) and ethylenediamine (ED) as reagents [20][21]. The molar ratio of CA:EG:ED:Me was 3.75:11.25:3.75:1.…”

Section: Catalysts Preparationmentioning

confidence: 99%

“…The use of perovskitelike oxides ABO 3 as catalyst precursors or supports is an attractive approach to minimize the coke deposition on catalysts. Thus, recently, in our study of methane dry reforming over LnFe 0.7-x Ru x Ni 0.3 O 3-d (Ln = La, Pr, Sm, x = 0 -0.1) perovskites [20][21], their transformation into composites comprised of Ni-Fe-(Ru) alloy particles and LnO x epitaxially bound with disordered Ln-Fe-O perovskite particles was demonstrated. This microstructure plays an important role in the high catalysts resistance to coking due to activation of CO 2 on the oxide sites and oxidation of CH x fragments at alloy particles/support interface by thus formed active oxygen-containing species.…”

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confidence: 99%

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Ni(Co)-containing catalysts based on perovskite-like ferrites for steam reforming of ethanol

Arapova

Pavlova

Rogov

et al. 2014

Catalysis for Sustainable Energy

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Catal. Sustain. Energy 2014; Volume 2: 10-20 IntroductionCatalytic steam reforming (SR) is now considered as the main pathway to produce hydrogen and synthesis gas from alcohols and other oxygenates derived from fast pyrolysis of biomass as a renewable feedstock [1][2][3][4][5][6][7]. Biohydrogen and bio-syngas could be used for production of liquid fuels (gasoline, diesel) and valuable chemicals production, and they are the cleanest fuels for different types of fuel cells, gas turbine, internal combustion engine as well.The active catalysts for bio-ethanol steam reforming (ESR) are usually based on supported transition metals (Ni, Co) [8][9][10][11][12][13][14] or noble metals [15][16][17][18][19]. The major problem of ethanol SR hindering its industrial application, especially in the case of Ni-containing catalysts, is their coking leading to deactivation [8][9][10][11][12][13][14]. The use of perovskitelike oxides ABO 3 as catalyst precursors or supports is an attractive approach to minimize the coke deposition on catalysts. Thus, recently, in our study of methane dry reforming over LnFe 0.7-x Ru x Ni 0.3 O 3-d (Ln = La, Pr, Sm, x = 0 -0.1) perovskites [20][21], their transformation into composites comprised of Ni-Fe-(Ru) alloy particles and LnO x epitaxially bound with disordered Ln-Fe-O perovskite particles was demonstrated. This microstructure plays an important role in the high catalysts resistance to coking due to activation of CO 2 on the oxide sites and oxidation of CH x fragments at alloy particles/support interface by thus formed active oxygen-containing species. The nature of Ln cation affects both the composition of Ni-Fe-(Ru) alloy and oxygen mobility/reactivity in perovskite.In the case of oxygenates reforming, perovskites as the catalyst precursors were reported only in few works [22][23][24][25][26][27]. Thus, LaMO 3 (M= Ni, Co, Fe, Mn) perovskites have been studied in the authothermal reforming of ethanol [22]. Nickel-supported Ca(Sr)-substituted La 1-x Ca(Sr) x FeO 3 perovskite oxide catalysts have shown very good stability and activity in steam reforming of ethanol [24].Another option for improving Ni-catalysts stability to coking is addition of molybdenum. It has been suggested that molybdenum-containing catalysts could possess Abstract: For two series of catalysts based on praseodymium ferrite, their structural and redox properties as well as performance in ethanol steam reforming have been studied. The first series was PrFe 1-x Ni(Co) x O 3 (x=0.3-0.4) perovskites prepared by modified Pechini route, and the second one was 5%wt.Ni(Co)/PrFeO 3 of different dispersion prepared by impregnation of PrFeO 3 , including samples modified by 5%wt. Mo. At temperatures above 700°C, for all catalysts, the main products were hydrogen and CO. At temperatures below 700°C, initial ethanol conversion and hydrogen yield were higher for supported catalysts as compared with ones derived from Ni(Co)-containing perovskites. While Ni-based catalysts derived from perovskite were more active as compared with Co-ba...

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“…The BET specific surface areas of perovskites are in the range of 3-10 m 2 /g which are comparable with the usual values obtained for such systems [20][21][24][25][26].…”

Section: Structural and Textural Featuressupporting

confidence: 71%

Section: Catalysts Preparationmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Ni(Co)-containing catalysts based on perovskite-like ferrites for steam reforming of ethanol

Arapova

Pavlova

Rogov

et al. 2014

Catalysis for Sustainable Energy

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show abstract

“…It is generally agreed that the availability of the mobile oxygen species on the catalyst surface is one of the most important factors affecting the activity and selectivity in the CH 4 dry reforming reaction. This also improves tolerance to coke [45]. In the kinetic scheme (15) proposed The structural studies of the nanocomposites comprised of NiO and YSZ and supported Pt group metals revealed pronounced interaction between constituting phases [17].…”

Section: Catalyst Features and Reaction Mechanismmentioning

confidence: 96%

Kinetic assessment of dry reforming of methane on Pt + Ni containing composite of fluorite-like structure

Bobrova

Bobin

Mezentseva

et al. 2016

Applied Catalysis B: Environmental

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“…As a result, TiO 2 can maintain the metallic nature of Rh, but it masks the catalytically active metal due to partial reduction of TiO 2 to TiO X , which then forms a layer over Rh in a Rh/TiO 2 catalyst . Noble metals on other types of supports have also been explored for DRM, including crystalline oxides (Pyrochlores, perovskite), mesoporous‐structure silicate, ZnLaAlO 4 , and NiO/MgO solid solution . In addition, DRM performance over Pd, Ru, or Ag metal catalyst could be enhanced using membrane reactors, which can separate the products CO and H 2 from the reaction system to drive the reaction toward formation of CO and H 2 at a lower temperature.…”

Section: Dry Reforming Of Methanementioning

confidence: 99%

Advances in catalytic conversion of methane and carbon dioxide to highly valuable products

Cai

2019

Energy Science & Engineering

124

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Two typical processes have been developed for the conversion of methane and carbon dioxide to higher valuable products: dry reforming of methane (DRM) and CO2‐oxidative coupling of methane (CO2‐OCM). Numerous articles reviewed progresses in either DRM or CO2‐OCM, but no one covers both processes. In this review article, we systematically evaluated progresses in both DRM and CO2‐OCM processes for conversion of methane and CO2 to highly valuable products. Critical issues, which are carbon deposition and high energy cost for DRM and the contradiction between large activity and high selectivity for CO2‐OCM, were emphasized. Strategies to develop effective catalysts were evaluated, including the enhancement of metal‐support interactions, the introduction of promotors, the formation of solid solutions, and the construction of core‐shell structures. Plasma and photocatalysis were discussed as new promising technologies for DRM and CO2‐OCM.

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Dry reforming of methane over LnFe0.7Ni0.3O3−δ perovskites: Influence of Ln nature

Cited by 51 publications

References 19 publications

Ni(Co)-containing catalysts based on perovskite-like ferrites for steam reforming of ethanol

Ni(Co)-containing catalysts based on perovskite-like ferrites for steam reforming of ethanol

Kinetic assessment of dry reforming of methane on Pt + Ni containing composite of fluorite-like structure

Advances in catalytic conversion of methane and carbon dioxide to highly valuable products

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