CO2 dry-reforming of methane over La0.8Sr0.2Ni0.8M0.2O3 perovskite (M = Bi, Co, Cr, Cu, Fe): Roles of lattice oxygen on C–H activation and carbon suppression

Sutthiumporn, K.; Maneerung, Thawatchai; Kathiraser, Yasotha; Kawi, Sibudjing

doi:10.1016/j.ijhydene.2012.04.059

Cited by 275 publications

(126 citation statements)

References 47 publications

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“…As commented before, the favoured presence of strong basic sites may result in far too tight adsorption of CO 2 , disabling it for further reaction with CO 2 , CH 4 , H 2 and/or other species. 33 Indeed, Ni-10Mg/Cu-clay exhibits the lowest activity of this series while presenting the highest population of strong basic groups.…”

Section: Catalytic Activity and Selectivity In Drmmentioning

confidence: 87%

Mg-promotion of Ni natural clay-supported catalysts for dry reforming of methane

et al. 2018

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Mg-promotion of natural clay based Ni-catalysts was considered, as a way of boosting the dry reforming of methane (DRM) activity of these materials. The results of the DRM experiments performed at temperatures from 600 C to 850 C evidenced much higher methane and CO 2 conversions for the Mg-promoted catalysts. Mg-promotion led of course to a significant increase of CO 2 -adsorption ability (basicity).However, the increased catalytic activity of the Mg-promoted materials was rather linked to increasedNi-dispersion and Ni 0 crystallite size. Indeed, independent of the physico-chemical properties of the support, the presence of Mg led to the formation of a MgNiO 2 mixed phase that, upon reduction, resulted in the formation of metallic Ni clusters having sizes around 7-9 nm, considerably smaller than in any of the non-promoted catalysts. Carbon formation was found to take place to a greater extent in the presence of the Mg-promoted catalysts, due to C-H bond activation leading also to favored direct methane decomposition (DMD). In spite of this, the activity of the Mg-promoted catalysts was well maintained over 5 hour DRM experiments performed at 750 C.

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Section: Catalytic Activity and Selectivity In Drmmentioning

confidence: 87%

Mg-promotion of Ni natural clay-supported catalysts for dry reforming of methane

et al. 2018

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“…Sutthiumporn et al (2012) found that lattice oxygen species in the partially substituted La x Sr 1-x Ni y Me 1-y O 3 (Me = Fe, Cu, Co, Bi) perovskite catalysts are crucial in activating the C-H bond of the CH 4 molecule for improved reactant conversion at lower temperature DRM reaction. In addition, carbon formation can be suppressed due to the reaction with CO 2 to form La 2 O 2 CO 3 .…”

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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“…It has been reported previously that simple perovskites of the type LaMO 3 (M = Ni/Co/Fe) have been reduced and then used as a catalyst in the DMR reaction. It was found that lanthanum oxide adsorbed carbon dioxide, which readily converted carbon generated by methane cracking (MCr) into carbon monoxide [33]. While the use of ceria as an additive for supported molybdenum carbide has been reported previously the use of the more abundant lanthanum and its oxides has not to the best of our knowledge been investigated previously on either monometallic or bimetallic carbides.…”

Section: à1 ð2þmentioning

confidence: 99%

“…However, soon after this, the catalyst re-established similar conversion and yield levels to those observed prior to reactor shutdown. A small increase in the carbon monoxide yield may be attributable to carbon laid down on the catalyst as lanthanum species (which are known to help prevent carbon deposition [33]) were converted to the perovskite. Presumably with no corresponding increase in CO 2 conversion this can be associated with the RB reaction.…”

Section: Hour Catalytic Testmentioning

confidence: 99%

The effect of lanthanum addition on the catalytic activity of γ-alumina supported bimetallic Co–Mo carbides for dry methane reforming

Almuqati

Кузнецов

et al. 2014

Appl Petrochem Res

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The effect of lanthanum addition to c-alumina supported bimetallic carbides has been studied for the reaction of dry methane reforming using four different lanthanum loading levels of 1, 5, 10 and 15 wt% of lanthanum. It has been demonstrated that the addition of lanthanum to supported bimetallic carbides at low loading levels (1 wt%) results in smaller carbide crystallite sizes compared to catalysts containing either no lanthanum or higher lanthanum loading levels (5-15 wt%). Increased lanthanum loading results in increased carbon dioxide desorption at 500-700°C. Reactions indicated that increased lanthanum loading resulted in significantly reduced product yields due to increased reverse water-gas shift activity. All materials exhibited degrees of sintering during the reaction. It was found that cobalt reacted with lanthanum species to form a LaCoO 3 phase. The 1 wt% catalyst possessed superior catalytic properties for dry methane reforming and was tested for 100 h. After an initial loss of activity, the catalyst appeared to stabilise, however, a decrease of *3 % in the H 2 :CO ratio, evidence of carbide crystallite growth and carbon deposition, indicated that a shift in the side reactions had occurred during the reaction.

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CO2 dry-reforming of methane over La0.8Sr0.2Ni0.8M0.2O3 perovskite (M = Bi, Co, Cr, Cu, Fe): Roles of lattice oxygen on C–H activation and carbon suppression

Cited by 275 publications

References 47 publications

Mg-promotion of Ni natural clay-supported catalysts for dry reforming of methane

Mg-promotion of Ni natural clay-supported catalysts for dry reforming of methane

CO2 as an Oxidant for High-Temperature Reactions

The effect of lanthanum addition on the catalytic activity of γ-alumina supported bimetallic Co–Mo carbides for dry methane reforming

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