High-Performance Binary Mo–Ni Catalysts for Efficient Carbon Removal during Carbon Dioxide Reforming of Methane

Zhang, Xiaoyu; Deng, Jiang; Pupucevski, Max; Impeng, Sarawoot; Ye, Bo; Chen, Guorong; Kuboon, Sanchai; Zhong, Qingdong; Faungnawakij, Kajornsak; Zheng, Lirong; Wu, Gang; Zhang, Dengsong

doi:10.1021/acscatal.1c02124

Cited by 68 publications

(60 citation statements)

References 54 publications

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“…Carbon accumulation during the DRM reaction performed under our experimental conditions demonstrates that its rate of oxidative removal is slower than its rate of formation. There have been a number of studies that focus on the development of coke-resistant DRM catalysts. − We note that there are two approaches to mitigate coking: either enhance the rate of oxidative removal of coke or lower the rate of its formation. The enhanced interaction between Ni and the Al 2 O 3 support facilitates CO 2 activation to produce O*, which leads to facile oxidation of coke.…”

Section: Resultsmentioning

confidence: 99%

“…Because 2D carbon is more easily removed than 1D carbon, another approach to a more efficient DRM reaction would be to minimize 1D carbon deposits, which are more resistant to CO 2 oxidation than 2D carbon deposits. It has been demonstrated in the literature that reducing the size of Ni nanoparticles or alloying Ni with other metals can limit the generation rate of 1D carbon and hence inhibit coking. , Thus, there are multiple factors that could lead to a more coke-resistant catalyst and they can involve a synergy between enhancing the oxidation of coke and a reduction in the rate of production of coke, particularly in its 1D form.…”

Section: Resultsmentioning

confidence: 99%

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Coking Can Enhance Product Yields in the Dry Reforming of Methane

et al. 2022

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Unlike the more common steam reforming of methane, dry (or CO2) reforming of methane (DRM) can directly consume CO2, the most abundant greenhouse gas, to produce useful syngas. However, catalyst deactivation during DRM, which is generally attributed to carbon deposition (coking), has traditionally impeded its industrialization. In this study, we focus on the coking process, the oxidation process taking place during DRM, and the nature of carbon deposits. We provide evidence that the carbon deposits on a standard Ni catalyst surface can be a reaction intermediate which is produced during the DRM reaction and removed by reaction with CO2. We demonstrate that coke is present in two principal forms: (1) two-dimensional graphite and (2) one-dimensional carbon nanotubes. Our data indicate that the two-dimensional carbon, which can cover and completely deactivate the catalyst, only accumulates significantly in a CO2-deficient environment. After 30 min under the DRM reaction conditions employed, the main form of coke present is one-dimensional carbon, which covers ∼50% of the catalyst surface, as estimated by the decrease in CH4 conversion. The DRM activity does not further change significantly over this 30 min time period, which implies that there is a steady state involving carbon deposition and carbon consumption. The carbon deposits which are oxidized to CO contribute to the DRM yield. This study therefore redefines the role of coke during the DRM reaction and has significant implications for reaction conditions that optimize DRM reaction yields and hence has potential economic and environmental benefits.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Coking Can Enhance Product Yields in the Dry Reforming of Methane

et al. 2022

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“…Great efforts including addition of catalysts promoters, [9,10] alloying with second metals, [11] and fabrication of confined structures [12][13][14] were devoted to develop high-performance Nibased catalysts for DRM. The inhibition of metal sintering by immobilizing Ni nanoparticles via confining strategy was particularly efficient to overcome carbon deposition.…”

Section: Introductionmentioning

confidence: 99%

Promoting Dry Reforming of Methane Catalysed by Atomically‐Dispersed Ni over Ceria‐Upgraded Boron Nitride

Maitarad

Zhang

et al. 2022

Chemistry An Asian Journal

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Dry reforming of methane (DRM) is a very promising protocol to mitigate the greenhouse gases by making use of CO 2 and CH 4 to produce valuable syngas. Nibased catalysts exhibit high activity and low cost for DRM, but suffer from inferior stability because of serious carbon deposition. Herein, we proposed atomically dispersed Ni supported by ceria-upgraded boron nitride whose specific activity exceeds that of boron nitride-supported Ni by 3 times. The results of temperature-programmed surface reaction show ceria enhanced the adsorption of CO 2 and its surface-active oxygen species would contribute to the activation of CH 4 . Moreover, Ni exhibited a strong metalsupport interaction which suppressed the metal sintering during the DRM reaction while the incorporation of BN could suppress carbon deposition. The incorporation of active metal oxides into inert support provides a route to adjust the interaction between metal and support, and to achieve a synergistic improvement in catalytic performance.

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“…Nevertheless, the coking issue is the main challenge for DRM because it can cause catalyst deactivation. Thus, a number of studies have been discussed on how to prevent carbon formation 8 – 10 . In this work, we proposed an approach to overcome this momentous concern by engineering the deposited carbon into carbon nanomaterials such as carbon nanotubes (CNTs) that can be also produced through catalytic decomposition of methane (CDM) as shown in Eq.…”

Section: Introductionmentioning

confidence: 99%

“…The production yield, purity of synthesized CNTs and gas hourly space velocity were calculated according to Eqs. (7)(8)(9)(10).…”

mentioning

confidence: 99%

Development of high-performance nickel-based catalysts for production of hydrogen and carbon nanotubes from biogas

Saconsint

Sae-tang

Srifa

et al. 2022

Sci Rep

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Selecting a suitable catalyst for implementing the simultaneous production of hydrogen-rich syngas and multi-walled carbon nanotubes through the integration of dry reforming and methane decomposition reactions has recently gained great interests. In this study, a series of bimetallic (NiMo/MgO) and trimetallic (CoNiMo/MgO, FeNiMo/MgO, CoFeMo/MgO) catalysts was prepared and evaluated for a catalytic activity of CH4 and CO2 conversions of biogas in a fixed bed reactor at 800 °C and atmospheric pressure. Among the investigated catalysts, the bimetallic NiMo/MgO catalyst showed the outstanding catalytic performance with 86.4% CH4 conversion and 95.6% CO2 conversion as well as producing the highest syngas purity of 90.0% with H2/CO ratio = 1.1. Moreover, the characterization of the synthesized solid products proved that the well-aligned structured morphology, high purity, and excellent textural properties of CNTs were obtained by using NiMo/MgO catalyst. On the other hand, using trimetallic catalysts which have the composition of Co and Fe leads to the severe deactivation. This could be attributed the catalyst oxidation with CO2 in biogas, resulting in the transformation of metals into large metal oxides. The integrative process with NiMo/MgO catalyst is regarded as a promising pathway, which has a high potential for directly converting biogas into the high value-added products and providing a green approach for managing the enormous amounts of wastes.

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High-Performance Binary Mo–Ni Catalysts for Efficient Carbon Removal during Carbon Dioxide Reforming of Methane

Cited by 68 publications

References 54 publications

Coking Can Enhance Product Yields in the Dry Reforming of Methane

Coking Can Enhance Product Yields in the Dry Reforming of Methane

Promoting Dry Reforming of Methane Catalysed by Atomically‐Dispersed Ni over Ceria‐Upgraded Boron Nitride

Development of high-performance nickel-based catalysts for production of hydrogen and carbon nanotubes from biogas

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