Journal ArticleDOI
Uncoupling the size and support effects of Ni catalysts for dry reforming of methane
TLDR
In this paper, a unique Ni-based catalyst in which the Ni nanoparticle size and support can be varied independently was devised for dry reforming of methane (DRM) at 800°C without a significant change in the Ni size, and overlayers of various metal oxides, including SiO 2, Al 2 O 3, MgO, ZrO 2, TiO 2.Abstract:
The dry reforming of methane (DRM; CH 4 + CO 2 ↔ 2H 2 + 2CO) can be a good way to utilize greenhouse gases for the production of valuable syn-gas. Ni-based catalysts have been used for this reaction; however, the Ni size effect and support effect were highly coupled and therefore could not be observed separately. Here, a unique catalyst in which the Ni nanoparticle size and support can be varied independently was devised. Highly uniform Ni nanoparticles with sizes of 2.6, 5.2, 9.0, and 17.3 nm were tested for DRM at 800 °C without a significant change in the Ni size, and overlayers of various metal oxides, including SiO 2 , Al 2 O 3 , MgO, ZrO 2 , TiO 2 , were tested with the 5.2 nm of Ni nanoparticles. The dependence of the CH 4 or CO 2 turnover frequency on the Ni size and support was evaluated separately. The 2.6 nm Ni nanoparticles showed 4.1 times higher methane turnover frequency than those with a size of 17.3 nm. When various metal oxide overlayers were tested with the same 5.2 nm Ni, Al 2 O 3 exhibited 4.3 times higher methane turnover frequency than SiO 2 . The independent observation of the effects of the Ni nanoparticle size and support will provide valuable guidelines for designing effective methane dry reforming catalysts.read more
Citations
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Journal ArticleDOI
Core–shell structured catalysts for thermocatalytic, photocatalytic, and electrocatalytic conversion of CO2
Sonali Das,Javier Pérez-Ramírez,Javier Pérez-Ramírez,Jinlong Gong,Nikita Dewangan,Kus Hidajat,Bruce C. Gates,Sibudjing Kawi +7 more
TL;DR: This review provides an in-depth assessment of core-shell structured catalysts for the thermocatalysis, photocatalytic, and electrocatalytic conversion of CO2 into synthesis gas and valuable hydrocarbons.
Journal ArticleDOI
A review on catalyst development for dry reforming of methane to syngas: Recent advances
A.A. Abdulrasheed,A.A. Abdulrasheed,Aishah Abdul Jalil,Yahya Gambo,M. Ibrahim,M. Ibrahim,H. U. Hambali,M.Y.S. Hamid +7 more
TL;DR: In this paper, a review provides a contemporary assessment of progresses recorded on synergistic interplay among catalyst components (active metals, support, promoters and binders) during dry reforming using state-of-the-art experimental and theoretical techniques.
Journal ArticleDOI
Silica–Ceria sandwiched Ni core–shell catalyst for low temperature dry reforming of biogas: Coke resistance and mechanistic insights
Sonali Das,Jangam Ashok,Zhoufeng Bian,Nikita Dewangan,Ming Hui Wai,Yonghua Du,Armando Borgna,Kus Hidajat,Sibudjing Kawi +8 more
TL;DR: In this paper, a sandwiched core-shell structured Ni-SiO2@CeO2 catalyst, with nickel nanoparticles encapsulated between silica and ceria, was developed and applied for dry reforming of biogas under low temperature conditions to test its coke inhibition properties.
Journal ArticleDOI
Atomically dispersed nickel as coke-resistant active sites for methane dry reforming
Mohcin Akri,Shu Zhao,Xiaoyu Li,Xiaoyu Li,Ketao Zang,Adam F. Lee,Mark A. Isaacs,Wei Xi,Yuvaraj Gangarajula,Jun Luo,Yujing Ren,Yi-Tao Cui,Lei Li,Yang Su,Xiaoli Pan,Wu Wen,Yang Pan,Karen Wilson,Lin Li,Botao Qiao,Hirofumi Ishii,Yen-Fa Liao,Aiqin Wang,Xiaodong Wang,Tao Zhang,Tao Zhang +25 more
TL;DR: Experimental and computational studies reveal that isolated Ni atoms are intrinsically coke-resistant due to their unique ability to only activate the first C-H bond in CH4, thus avoiding methane deep decomposition into carbon and offers new opportunities to develop large-scale DRM processes using earth abundant catalysts.
Journal ArticleDOI
Coke formation and deactivation during catalytic reforming of biomass and waste pyrolysis products: A review
TL;DR: In this article, a review deals with the currently existing alternatives at the catalyst and reactor level to cope with catalyst deactivation and increase process stability, and then delves with the fundamental phenomena occurring during this catalysts deactivation.
References
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Journal ArticleDOI
Influence of active metal loading and oxygen mobility on coke-free dry reforming of Ni–Co bimetallic catalysts
TL;DR: In this paper, two different techniques (precipitation with ammonia and hydrothermal synthesis with ethylene glycol, both followed by autoclave aging) were employed for the synthesis of CeO2-ZrO2 mixed oxides on a 80-20-wt.% basis.
Journal ArticleDOI
CO2 Reforming of Methane to Synthesis Gas over Sol–Gel-made Ni/γ-Al2O3 Catalysts from Organometallic Precursors
TL;DR: In this article, three Ni-based catalysts with the same nickel content (10 wt%) were prepared by conventional impregnation of commercial γ-Al2O3 support (NiAlCO-IM), sol-gel-made NiAlSG-IM and direct sol−gel processing from organometallic compounds, respectively.
Journal ArticleDOI
Particle size effect in the low temperature reforming of methane by carbon dioxide on silica-supported Ni nanoparticles
David Baudouin,David Baudouin,Uwe Rodemerck,Frank Krumeich,Aimery De Mallmann,Kai C. Szeto,Hervé Ménard,Laurent Veyre,Jean Pierre Candy,Paul B. Webb,Chloé Thieuleux,Christophe Copéret,Christophe Copéret +12 more
TL;DR: In this article, the influence of nickel particle size in the range of 1.6-7.3 nm on catalyst performance in low temperature CO 2 reforming of methane reaction has been investigated using well-defined catalysts based on a neutral silica support.
Journal ArticleDOI
Methane steam reforming over Ni/Ce-ZrO2 catalyst : Influences of Ce-ZrO2 support on reactivity, resistance toward carbon formation, and intrinsic reaction kinetics
TL;DR: Ni/Ce-ZrO2 showed good methane steam reforming performance in terms of stability toward the deactivation by carbon deposition as discussed by the authors, compared to conventional Ni/Al2O3; the requirement of inlet H2O/CH4 to operate without the formation of carbon species is much lower.
Journal ArticleDOI
Durable Ni/MgO catalysts for CO2 reforming of methane: Activity and metal–support interaction
TL;DR: In this paper, NiO was incorporated into the MgO support to form NiO-MgO solid solution during the calcination stage of the catalyst preparation, and the presence of readily reducible free NiO in the calcined (unreduced) NiO/mgO samples was shown to produce the deactivating Ni/Mg O catalysts during the CO2/CH4 reaction.
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