Development of stable bimetallic catalysts for carbon dioxide reforming of methane

Zhang, Jianguo; Wang, Hui; Dalai, Ajay K.

doi:10.1016/j.jcat.2007.05.004

Cited by 602 publications

(366 citation statements)

References 61 publications

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“…[58][59][60][61][62][63][64] Additionally, by introducing two different reducible cations in the LDH structure (e.g. Ni-Cu; [65][66][67] Ni-Co, [68][69][70] Pd-Cu, 71,72 among others), the subsequent thermal activation/ reduction can lead to the formation of bimetallic catalysts, whose catalytic and stability properties are generally better than those of the respective monometallic systems. The anion-exchange capacity of LDHs has also been exploited as a way to incorporate well-dispersed catalytic species in the interlayer-gallery space.…”

Section: Metal-supported Catalystsmentioning

confidence: 99%

Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

et al. 2017

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Layered double hydroxides (LDHs) and derived materials have been widely used as heterogeneous catalysts for different types of reactions either in gas or in liquid phase. Among these processes, the valorization/upgrading of lignocellulosic biomass and derived molecules have attracted enormous attention because it constitutes a pivotal axis in the transition from an economic model based on fossil resources to one based on renewable biomass resources with preference for biomass waste streams. Proof of this is the increasing amount of literature reports regarding the rational design and implementation of LDHs and related materials in catalytic processes such as: depolymerization, hydrogenation, selective oxidations, and C-C coupling reactions, among others, where biomass-derived compounds are used. The major aim of this contribution is to situate the most recent advances on the implementation of these types of catalysts into a lignocellulosic-feedstock biorefinery scheme, highlighting the versatility of LDHs and derived materials as multifunctional, tunable, cheap and easy to produce heterogeneous catalysts.

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Section: Metal-supported Catalystsmentioning

confidence: 99%

Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

et al. 2017

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“…It has been reported that the introduction of Cu in the catalyst formulation suppresses coke deposition and the sintering of the active phase, in steam/dry reforming of hydrocarbons [44][45][46][47][48][49][50]. Fornasiero et al [45] have comprehensively studied the methanol and ethanol steam reforming activity of a series of Ni x Cu y /Al 2 O 3 catalysts prepared by wet-impregnation method.…”

Section: Ni Metal Particles Modified With Other Metals (Sn Cu Co Mmentioning

confidence: 99%

Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems

et al. 2013

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Steam reforming of light hydrocarbons provides a promising method for hydrogen production. Ni-based catalysts are so far the best and the most commonly used catalysts for steam reforming because of their acceptably high activity and significantly lower cost in comparison with alternative precious metal-based catalysts. However, nickel catalysts are susceptible to deactivation from the deposition of carbon, even when operating at steam-to-carbon ratios predicted to be thermodynamically outside of the carbon-forming regime. Reactivity and deactivation by carbon formation can be tuned by modifying Ni surfaces with a second metal, such as Au through alloy formation. In the present review, we summarize the very recent progress in the design, synthesis, and characterization of supported bimetallic Ni-based catalysts for steam reforming. The progress in the modification of Ni with noble metals (such as Au and Ag) is discussed in terms of preparation, characterization and pretreatment methods. Moreover, the comparison with the effects of other metals (such as Sn, Cu, Co, Mo, Fe, Gd and B) is addressed. The differences of catalytic activity, thermal stability and carbon species OPEN ACCESSCatalysts 2013, 3 564 between bimetallic and monometallic Ni-based catalysts are also briefly shown.

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“…There have been concerted efforts by researchers in the field of catalysis in designing and developing catalysts with high activity and stability to overcome challenges of sintering and carbon depositions [19,20].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Catalytic Performance of Ceria-Supported Cobalt Catalyst for Methane Dry Reforming to Syngas

2017

MJAS

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In this study the synthesis, characterization and catalytic performance of CeO 2 (Ceria) supported Co catalyst was investigated. First, the ceria was synthesized by direct thermal decomposition of Ce(NO 3 ) 3 .6H 2 O and subsequently impregnated with 20 wt.% Co using aqueous solution of Co(NO 3 ) 2 .6H 2 O as a precursor. The synthesized catalyst was characterized using TGA, N 2 -adsorption-desorption, X-ray Diffractometry (XRD), Field Emission Scanning Electron Microscope (FESEM-EDX), and Fourier Transformation Infrared (FTIR). The catalytic property of the ceria-supported cobalt catalyst was tested in methane dry reforming using a stainless steel fixed bed reactor. The dry reforming reaction was performed at the temperature range of 923-1023 K under a controlled atmospheric pressure and constant gas hourly space velocity (GHSV) of 30000 h -1 . The effects of reactant (CH 4 and CO 2 ) feed ratio was investigated on reactants conversion, product yields, and selectivity. The ceria-supported cobalt catalyst recorded highest catalytic activity at a CH 4 : CO 2 ratio of 0.9 and temperature of 1023 K. The highest values of 79.5% and 87.6% were recorded for the CH 4 and CO 2 conversions respectively. Furthermore, highest yields of 41.98% and 39.76%, as well as selectivity of 19.56% and 20.72%, were obtained for H 2 and CO respectively. Syngas ratio of 0.90 was obtained from the dry reforming of methane, making it suitable as feedstock for Fischer-Tropsch synthesis (FTS). Keywords: ceria, cobalt, Fischer-Trosch synthesis, methane dry reforming, syngas AbstrakDalam kajian ini, sintesis, pencirian berserta prestasi tindakbalas pemangkin Co/CeO 2 telah dijalankan. Terdahulu, ceria disintesis daripada penguraian terma secara langsung ke atas Ce(NO 3 ) 3 .6H 2 O, diikuti oleh formulasi dengan 20% logam Co menggunakan larutan akueus Co(NO 3 ) 2 .6H 2 O sebagai pelopor. Mangkin yang diperolehi dicirikan dengan menggunakan kaedah TGA, N 2 -penjerapan penyaherapan, pembelauan sinar X (XRD), Mikroskop Pengimbas Elektron Pancaran Medan -Sinar-X Serakan Tenagan (FESEM-EDX) dan Inframerah Tranformasi Fourier (FTIR). Prestasi pemangkin Co/CeO 2 telah diuji untuk tindakbalas penghasilan metana kontang di dalam reaktor keluli tahan karat. Tindakbalas kimia tersebut telah dijalankan pada suhu berjulat daripada 923-1023 K, tekanan 1 atm serta GHSV bersamaan 30000 h -1 . Kesan nisbah reaktan (CH 4 and CO 2 ) terhadap penukaran reaktan serta hasil dan pemilihan produk telah disiasat. Mangkin Co/CeO 2 mencatatkan aktiviti pemangkin paling tinggi pada nisbah CH 4 /CO 2 bersamaan 0.9 dan suhu 1023 K. Penukaran CH 4 and CO 2 mencatatkan nilai tertinggi bersamaan 79.5% dan 87.6%. Tambahan pula, hasil tertinggi bersamaan 37.6% dan 40% berserta sifat pemilihan bersamaan 19.56% dan 20.72% untuk H 2 dan CO telah direkodkan. Nisbah gas sintesis bersamaan 0.9 telah diperolehi daripada penghasilan semula metana kontang bersesuaian untuk tindakbalas sintesis Fischer-Trosch.

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Development of stable bimetallic catalysts for carbon dioxide reforming of methane

Cited by 602 publications

References 61 publications

Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

Recent advances on the utilization of layered double hydroxides (LDHs) and related heterogeneous catalysts in a lignocellulosic-feedstock biorefinery scheme

Ni-Based Catalysts for Low Temperature Methane Steam Reforming: Recent Results on Ni-Au and Comparison with Other Bi-Metallic Systems

Synthesis, Characterization and Catalytic Performance of Ceria-Supported Cobalt Catalyst for Methane Dry Reforming to Syngas

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