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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