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
Improvement of Ni-based catalyst properties and activity for dry reforming of methane by application of all-in-one preparation method
André T.S. Ribeiro,Italo Ricardo S. Araujo,Emerson F.M. da Silva,Pedro Nothaft Romano,J. M. A. Almeida,Eduardo Falabella Sousa-Aguiar,Radmila Tomovska,Oihane Sanz,Luciano C. Almeida +8 more
Journal ArticleDOI
High-performance CoCe catalyst constructed by the glucose-assisted in-situ reduction for CH4/CO2 dry reforming
TL;DR: In this article , a glucose-assisted in-situ reduction method was used to construct the Co-Ce catalysts for the CO2/CH4 dry reforming (DRM) reaction, which showed that the metal Co was the primary active species in the DRM reaction.
Posted ContentDOI
Development of Silicalite-1-encapsulated Ni catalyst from Ni phyllosilicate for dry reforming of methane
TL;DR: In this article , a Silicalite-1-encapsulated ultrafine Ni nanoparticle catalyst(Ni@S-1) by using Ni phyllosilicate (Ni-PS) as precursor was newly developed.
Book ChapterDOI
Core–Shell Confinement MnCeO x @ZSM-5 Catalyst for NO x Removal with Enhanced Performances to Water and SO 2 Resistance
TL;DR: In this article, a novel shielding method was developed to design and prepare one core-shell structured Mn-Ce mixed oxide catalytic material for NH3-SCR of NOx.
Journal ArticleDOI
Roles of metal oxide overlayers on hydrotalcite-structured Ni-MgAlOx for dry reforming of CH4 with CO2
TL;DR: The thermal stability of Ni nanoparticles on the coprecipitated hydrotalcite-like Ni-MgAl2O4 surfaces was enhanced by simply introducing an overlayer coating method with four different metal oxides (M) for a harsh dry reforming reaction of CH4 with CO2 (DRM) as mentioned in this paper .
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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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