Pulse study of CO2 reforming of methane over LaNiO3

“…According to Batiot-Dupeyrat et al (2003), the LaNiO 3 perovskite-type oxide is reduced under hydrogen atmosphere in three steps. In the first reduction step The well-defined perovskite structure and their interesting redox properties and accessibility enable attainment of nanometer sized metallic particles under reducing environment (Valderrama et al, 2010).…”

Section: Perovskite Catalystsmentioning

confidence: 99%

CO2 as an Oxidant for High-Temperature Reactions

Kawi

Kathiraser

2015

Front. Energy Res.

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This paper presents a review on the developments in catalyst technology for the reactions utilizing CO 2 for high-temperature applications. These include dehydrogenation of alkanes to olefins, the dehydrogenation of ethylbenzene to styrene, and finally CO 2 reforming of hydrocarbon feedstock (i.e., methane) and alcohols. Aspects on the various reaction pathways are also highlighted. The literature on the role of promoters and catalyst development is critically evaluated. Most of the reactions discussed in this review are exploited in industries and related to on-going processes, thus providing extensive data from literature. However, some reactions, such as CO 2 reforming of ethanol and glycerol, which have not reached industrial scale, are also reviewed owing to their great potential in terms of sustainability, which is essential as energy for the future. This review further illustrates the building-up of knowledge that shows the role of support and catalysts for each reaction and the underlying linkage between certain catalysts, which can be adapted for the multiple CO 2 -related reactions.

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“…New types of catalysts are currently developed to minimize the kinetics of carbon formation [11][12][13][14]. Among those solids, perovskites has been used since these mixed-oxides, when reduced; produce small particles in the order of nanometers with high dispersion inhibiting carbon formation [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Among those solids, perovskites has been used since these mixed-oxides, when reduced; produce small particles in the order of nanometers with high dispersion inhibiting carbon formation [10][11][12][13][14]. Additionally, it has been reported [15] that niobium has the ability to trap Ni during the catalytic cracking on Ni/Nb 2 O 5 -SiO 2 which will also inhibit carbon formation.…”

Section: Introductionmentioning

confidence: 99%

Ni–Nb-Based Mixed Oxides Precursors for the Dry Reforming of Methane

et al. 2011

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Perovskite-related mixed-oxides based on La Ni Nb and La Sr Ni Nb were synthesized by the auto combustion method to use as precursors materials for the catalytic reforming of methane at 700 8C, atmospheric pressure, CH 4 :CO 2 = 1:1. LaNiO 3 and LaNbO 4 were used as reference. XRD analysis show that the synthesis method produce a new series of precursor family formed by a mixture of oxides where Ni crystallized as part of a perovskite and Ruddlesden-Popper structure while Nb formed lanthanum orthoniobate LaNbO 4 , a scheelite-type structure alternating with oxide layers, with phase distribution depending on niobium content. For Nb (x B 0.3) Ni crystallizes as LaNiO 3 perovskite-type oxide while for Nb (x C 0.7) it forms mainly the orthoniobate phase LaNbO 4 a scheelite-type structure. At higher calcined temperatures (*1100°C) La 2 Ni 0.8 Nb 0.2 O 4 was formed with a Ruddlesden-Popper structure consisting of three perovskite type layers along the c-axis alternating with a layer of the rock salt type phase. TEM analysis showed the presence of cubic particles with sizes varying between 5 and 60 nm depending on the extent of substitution of Ni by Nb. Reduction of the perovskite-related precursor oxides produced a series of Ni 0 /La 2 O 3 -NbOx oxides with high metallic dispersion which favors the activity and stability of the catalysts. Introduction of doping quantities of Sr into LaNi 0.8 Nb 0.2 O 3±k structure produced a mixture of oxides with Sr dissolved in the lanthanum orthoniobate LaNbO 4 scheelite-type structure due to the similarity of ionic radii of La and Sr. Under the reaction conditions conversions near the thermodynamic equilibrium were attained which remains for long periods of time assessing the stability of the synthesized catalysts.

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Pulse study of CO2 reforming of methane over LaNiO3

Cited by 124 publications

References 14 publications

Dry reforming of methane over Ni perovskite type oxides

Dry reforming of methane over Ni perovskite type oxides

CO2 as an Oxidant for High-Temperature Reactions

Ni–Nb-Based Mixed Oxides Precursors for the Dry Reforming of Methane

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