CO 2  reforming of methane over Ni–Co/ZSM5 catalysts. Aging and carbon deposition study

Estephane, Jane; Aouad, Samer; Hany, Sara; Khoury, Bilal El; Gennequin, Cédric; Zakhem, Henri El; Nakat, John El; Aboukaı̈s, Antoine; Aad, Edmond Abi

doi:10.1016/j.ijhydene.2015.05.147

Cited by 125 publications

(39 citation statements)

References 49 publications

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“…The catalysts were pelletized and sieved to obtain particles in the size range of 0.35 < d p < 0.80 mm to minimize mass transport limitations . A fixed volume of 0.05 cm 3 of catalyst was then introduced in a quartz round bottom fixed bed reactor where the steam reforming of methanol reaction took place.…”

Section: Methodsmentioning

confidence: 99%

Steam reforming of methanol over ruthenium impregnated ceria, alumina and ceria-alumina catalysts

Aouad

Gennequin

Mrad

et al. 2016

Int. J. Energy Res.

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Summary The wet impregnation method was used to prepare different ruthenium promoted Ce–Al catalysts. These catalysts were used in the steam reforming of methanol reaction (SRM). The effects of the reaction temperature (200–400 C) and the catalyst composition were studied for optimization reasons. The steam to methanol molar ratio was kept constant (S/M = 2). The promotion of cerium/aluminum oxides with Ru enhanced their catalytic activity. The catalytic test results showed that the Ru/Ce combination was the most beneficial. The synergy between Ru and cerium oxide led to the formation of active sites with excellent redox properties. For high active phase content, the 5RuCe catalyst exhibited the highest hydrogen production amount with no CO formation. This catalyst was kept under stream for 5 days at 400 C, and no significant deactivation was observed. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Methodsmentioning

confidence: 99%

Steam reforming of methanol over ruthenium impregnated ceria, alumina and ceria-alumina catalysts

Aouad

Gennequin

Mrad

et al. 2016

Int. J. Energy Res.

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“…Table 1 shows that the ratio of metallic cobalt on the surface to the whole cobalt content determined by XPS was hardly more than 50%, and these values decreased further during the reaction; it seems that the catalysts slightly oxidized during the reaction. There are some observations that the supported Co catalysts are not oxidized [37] but reduced [38] under the catalytic test, probably due to the reducing nature of the evolved products (H 2 and CO). It has to be noted that in both cases the reaction temperature was higher (1073 K) than the reduction temperature.…”

Section: Characterization Of the Catalysts After The Catalytic Reactionmentioning

confidence: 98%

Dry reforming of CH4 on Co/Al2O3 catalysts reduced at different temperatures

et al. 2017

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Keywords:Dry reforming of CH4 Co/Al2O3 catalyst XPS of Co/Al2O3 Surface carbon a b s t r a c t The reforming of methane with carbon dioxide has been investigated at 773 K on 10% Co/Al 2 O 3 reduced at different temperatures up to 1173 K. The catalysts were characterized by BET, TPR, XRD and XPS methods. TPR and XPS results revealed that during the pre-treatment of the catalysts the Co only partially reduced. The reduction degree and the amount of the structured metallic cobalt increased with the reduction temperature. The conversion of the reactants was the highest on the sample reduced at 973 K, but the turnover frequencies of CO and H 2 formation increased as the reduction temperature increased.The amount of surface carbon significantly depended on the pre-treatment temperature of the catalysts. The IR spectra registered at the beginning of the reaction indicate that tilted CO was formed, but the position of the absorption bands depends on the reduction temperature of the catalysts. Similarly, the pre-treatment temperature influenced the type of the surface carbon determined by XPS. We assume that the different structures of the metallic Co formed in pretreatment resulted in the different catalytic behaviors.

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“…Therefore, an appropriate substitution in the amount of Co and Ni was required to provide equality on the conversions of CH 4 and CO 2 to synthesis gas. Similarly, in the development of a Ni‐Co catalyst, Nagaoka et al , Gonzalez‐delaCruz et al , Ay and Üner , Seguota et al , Valderrama et al , Gao et al , Bian and Kawi , Xu et al , and Estephane reported that the coke formation can be remarkably reduced with the addition of a suitable amount of Co.…”

Section: Deactivation Studies Of Bimetallic Ni‐based Catalystsmentioning

confidence: 99%

High‐Performance Bimetallic Catalysts for Low‐Temperature Carbon Dioxide Reforming of Methane

et al. 2020

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Catalytic dry reforming of methane (DRM) is a promising way for renewable syngas production due to the utilization of both CO2 and CH4 greenhouse gases. Current approaches were made to improve the catalytic activity and coke resistance by introducing a second metal into the Ni‐based catalytic system. This bimetallic catalytic system showed a significant improvement in coke resistance due to the synergistic effect of both metals towards the reaction. This review summarizes recent developments in bimetallic catalysts in DRM which focused on the evaluation of catalysts, deactivation studies, and reaction mechanisms of developed bimetallic catalysts.

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CO 2 reforming of methane over Ni–Co/ZSM5 catalysts. Aging and carbon deposition study

Cited by 125 publications

References 49 publications

Steam reforming of methanol over ruthenium impregnated ceria, alumina and ceria-alumina catalysts

Steam reforming of methanol over ruthenium impregnated ceria, alumina and ceria-alumina catalysts

Dry reforming of CH4 on Co/Al2O3 catalysts reduced at different temperatures

High‐Performance Bimetallic Catalysts for Low‐Temperature Carbon Dioxide Reforming of Methane

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