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
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Journal ArticleDOI
Rational design and precise manipulation of nano-catalysts
Qing Ye Liu,Junguo Ma,Chen Chen +2 more
TL;DR: In this paper , an extensive investigation of the factors impacting nano-catalysis along with the synthetic strategies developed to prepare the nano catalysts for applications in electrocatalysis, photocatalysis and thermocatalysis is presented.
Journal ArticleDOI
CompositeAssisted Approach for the Synthesis of Ni@SiO 2 –ZrO 2 Catalysts and Their Performance Evaluationin Methane Dry Reforming
TL;DR: In this article, a new and versatile approach for distributing metal nanoparticles within an encapsulating non-hydrolytic sol-gel metal oxide framework is reported. But the method uses a metal-chitosan composite material as a sacrificial precursor, which allows for easy expansion to a range of encapsulating metal oxides as well as different active metal specie.
Journal ArticleDOI
CO 2 Reforming of Methane Over Ni/Carbon Fibers-La 2 O 3 Catalyst: Effects of Ultrasound-Assisted Method and La 2 O 3 Doping on Catalytic Properties and Activity
TL;DR: In this paper, a dual-support Ni/CF-La2O3 was synthesized using an ultrasound-assisted method to improve the catalytic efficiency of Ni/carbon fibers.
Journal ArticleDOI
Process parameter optimization for integrated process of coal pyrolysis with dry reforming of low carbon alkane over Ni/La2O3-ZrO2
TL;DR: In this paper , an integrated coal pyrolysis with dry reforming of low carbon alkane (CP-DRA) is used to improve the tar yield, which is 1.18 times of that under N2.
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Journal ArticleDOI
A review of dry (CO2) reforming of methane over noble metal catalysts
Devendra Pakhare,James J. Spivey +1 more
TL;DR: Dry (CO2) reforming of methane literature for catalysts based on Rh, Ru, Pt, and Pd metals is reviewed, including the effect of these noble metals on the kinetics, mechanism and deactivation of these catalysts.
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A review of dry (CO2) reforming of methane over noble metal catalysts
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