Silica–Ceria sandwiched Ni core–shell catalyst for low temperature dry reforming of biogas: Coke resistance and mechanistic insights

Das, Sonali; Ashok, Jangam; Bian, Zhoufeng; Dewangan, Nikita; Wai, Ming Hui; Du, Yonghua; Borgna, Armando; Hidajat, K.; Kawi, Sibudjing

doi:10.1016/j.apcatb.2018.02.041

Cited by 386 publications

(265 citation statements)

References 74 publications

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“…For example, Gong et al designed a nickel phyllosilicate nanotubes catalyst for ethanol steam reforming, which showed high thermal stability of nickel nanoparticles at 650°C due to the confinement effect of phyllosilicate nanotubes, thus improving the stability and inhibiting carbon deposition . Besides that, Li et al synthetized a series of Ni‐based catalysts with core–shell structure that exhibited long‐term stability in dry reforming of methane at 600°C . Encapsulating metal nanoparticle into the microporous cages or channels of zeolites could further decrease the particle size, even maintaining subnanometric scale approximate to micropore .…”

Section: Introductionmentioning

confidence: 99%

Selective steam reforming of n‐dodecane over stable subnanometric NiPt clusters encapsulated in Silicalite‐1 zeolite

et al. 2020

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Multimetallic nanocatalysts have attracted increasing attention for steam reforming owing to highly exposed active sites, but often suffering from severe sintering. Herein, we design subnanometric Ni‐Pt bimetal clusters (ca. 1.7 nm) encapsulated in Silicalite‐1 zeolite (2Ni0.5Pt@S‐1) through ligand‐stabilized method to prevent sintering by fixing the metal into microporous channels. In the steam reforming of n‐dodecane test, 2Ni0.5Pt@S‐1 gave an excellent activity and stability with a decrease of conversion only 4% at 600°C for 4 hr, which was about a quarter that of 2Ni0.5Pt/S‐1 synthesized by co‐impregnation method, ascribing to superior sinter‐resistance of encapsulation structure. Moreover, 2Ni0.5Pt@S‐1 exhibited a higher H2 selectivity up to 69.9% than that of 2Ni0.5Pt/S‐1 (64.4%), owing to suppressed methanation reaction based on subnanometric clusters. Shape‐selective steam reforming of n‐dodecane and ofm‐xylene was also observed, because of m‐xylene could hardly diffuse into the zeolite channels due to its bulky molecular size, further preventing potential deactivation by tars in reforming process.

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Section: Introductionmentioning

confidence: 99%

Selective steam reforming of n‐dodecane over stable subnanometric NiPt clusters encapsulated in Silicalite‐1 zeolite

et al. 2020

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“…The Ni/SiO 2 catalyst shows a minimal reduction temperature of 268 °C, which is ascribed to a free NiO . By comparison, the Ni–SiO 2 and Ca–Ni–SiO 2 catalysts exhibit high‐temperature peaks of 541 and 550 °C respectively without the reduction peaks in the range of 300–400 °C, which confirms strong interaction between Ni and the SiO 2 support for those two catalysts [14a]…”

Section: Resultsmentioning

confidence: 80%

“…According to the theoretical thermodynamic calculation of DRM reaction under low‐temperature, the activation of both CO 2 and CH 4 is considered viable but the carbon deposition becomes a major issue due to enhanced Boudouard reaction . The design of a coking‐resistant Ni‐based catalyst with desirable reactivity under low‐temperature DRM process has received attention in industrial fields …”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Highly Coking‐Resistant and Active Nickel‐Based Catalyst for Low‐Temperature CO₂ Reforming of Methane

Kong

Guan

et al. 2019

Energy Tech

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CO2 reforming of methane (DRM) represents a viable process to convert the two major greenhouse gases (CO2 and CH4) into high‐value syngas. Nickel‐based catalysts are effective and economical for such a reaction, but they are limited by deactivation owing to sintering and coking. In this work, a one‐pot hydrothermal method is presented, whereby highly stable nano‐sized Ni particles combined with a highly dispersed Ca promoter is implemented over Ca–Ni–SiO2. The so‐produced catalyst shows excellent performance for DRM at temperature as low as 550 °C, with no deactivation observed after a 20‐h catalytic run. Further characterizations demonstrate that the nickel silicate precursor produces sintering‐resistant Ni particles with an average diameter of 3.6 nm, harboring substantial active sites and with relatively active carbon species. In addition, the high dispersion of Ca promoter significantly increases the adsorption of CO2, which enhances the elimination of carbon deposition. Such a synergistic effect derived from small‐sized Ni active sites and basic promoter remarkably increases activity and stability of the catalyst, and inhibits carbon deposition, with only 0.6% deposited carbon formed.

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“…Carbon dioxide (CO 2 ) conversion and utilization have been the research focus in the last decades . Among various reactions investigated, CO 2 hydrogenation to methane (CH 4 ), known as CO 2 methanation, has received special attention due to its significance in both energy and environmental fields .…”

Section: Introductionmentioning

confidence: 99%

“…Carbon dioxide (CO 2 ) conversion and utilization have been the research focus in the last decades. [1][2][3] Among various reactions investigated, CO 2 hydrogenation to methane (CH 4 ), known as CO 2 methanation, has received special attention due to its significance in both energy and environmental fields. [4][5][6] One of the most promising applications over CO 2 methanation is the Power to Gas technology, which aims to store electricity energy from renewable sources in natural gas grid.…”

Section: Introductionmentioning

confidence: 99%

Enhanced low‐temperature activity for CO₂ methanation over NiMgAl/SiC composite catalysts

Wang

Liu

et al. 2019

J of Chemical Tech & Biotech

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Background Carbon dioxide (CO2) methanation is an important reaction in energy and environmental fields, which aims to convert CO2 into natural gas with hydrogen (H2) from renewable sources. One of the technical bottlenecks for CO2 methanation is the lack of feasible catalysts, especially the ones with satisfactory low‐temperature activity. Results The NiMgAl/SiC composite catalyst that was derived from hydrotalcite precursor on the SiC substrate possessed enhanced low‐temperature activity and excellent long‐term stability in CO2 methanation. For the low‐temperature activity, CO2 conversion reached 63.8% and 74.5% at 300 and 325 °C respectively. For the long‐term stability, CO2 conversion merely decreased from 78.4% to 76.9% after 50 h of reaction at 400 °C. Conclusion The NiMgAl/SiC composite catalyst was successfully synthesized by the co‐precipitation method, which exhibited enhanced low‐temperature methanation activity compared with the NiMgAl and Ni/SiC catalysts. The superior low‐temperature activity was mainly ascribed to two structural parameters. One was the small nickel (Ni) nanoparticle size, which was endowed by the unique structure of the hydrotalcite precursor. The other one was the high reducibility of Ni species, which was rendered by the appropriate metal‐support interactions. The present work provides guidelines for the synthesis of highly efficient composite catalysts for energy and environmental applications. © 2019 Society of Chemical Industry

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Silica–Ceria sandwiched Ni core–shell catalyst for low temperature dry reforming of biogas: Coke resistance and mechanistic insights

Cited by 386 publications

References 74 publications

Selective steam reforming of n‐dodecane over stable subnanometric NiPt clusters encapsulated in Silicalite‐1 zeolite

Selective steam reforming of n‐dodecane over stable subnanometric NiPt clusters encapsulated in Silicalite‐1 zeolite

Facile Synthesis of Highly Coking‐Resistant and Active Nickel‐Based Catalyst for Low‐Temperature CO₂ Reforming of Methane

Enhanced low‐temperature activity for CO₂ methanation over NiMgAl/SiC composite catalysts

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Silica–Ceria sandwiched Ni core–shell catalyst for low temperature dry reforming of biogas: Coke resistance and mechanistic insights

Cited by 386 publications

References 74 publications

Selective steam reforming of n‐dodecane over stable subnanometric NiPt clusters encapsulated in Silicalite‐1 zeolite

Selective steam reforming of n‐dodecane over stable subnanometric NiPt clusters encapsulated in Silicalite‐1 zeolite

Facile Synthesis of Highly Coking‐Resistant and Active Nickel‐Based Catalyst for Low‐Temperature CO2 Reforming of Methane

Enhanced low‐temperature activity for CO2 methanation over NiMgAl/SiC composite catalysts

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Facile Synthesis of Highly Coking‐Resistant and Active Nickel‐Based Catalyst for Low‐Temperature CO₂ Reforming of Methane

Enhanced low‐temperature activity for CO₂ methanation over NiMgAl/SiC composite catalysts