Methane steam reforming in water deficient conditions on Ir/Ce0.9Gd0.1O2-x catalyst: Metal-support interactions and catalytic activity enhancement

2018 ◽  
Vol 234 ◽  
pp. 279-289 ◽  
Author(s):  
S.K. Cheah ◽  
L. Massin ◽  
M. Aouine ◽  
M.C. Steil ◽  
J. Fouletier ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Methane Steam Reforming ◽  
Methane Steam ◽  
Catalyst Metal ◽  
Metal Support ◽  
Activity Enhancement ◽  
Metal Support Interactions

scholarly journals Reaction Pathway for Coke-Free Methane Steam Reforming on a Ni/CeO2 Catalyst: Active Sites and the Role of Metal–Support Interactions

ACS Catalysis ◽  
2021 ◽  
pp. 8327-8337
Author(s):  
Agustín Salcedo ◽  
Pablo G. Lustemberg ◽  
Ning Rui ◽  
Robert M. Palomino ◽  
Zongyuan Liu ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Active Sites ◽  
Reaction Pathway ◽  
Methane Steam Reforming ◽  
Methane Steam ◽  
Metal Support ◽  
Metal Support Interactions

scholarly journals Catalytic Activity of Oxidation-Reduction Pre-Treated Ni3Al for Methane Steam Reforming

2010 ◽  
Vol 89-91 ◽  
pp. 645-650 ◽  
Author(s):  
Ya Xu ◽  
Dong Hyun Chun ◽  
Jun Hyuk Jang ◽  
Masahiko Demura ◽  
Dang Moon Wee ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Active Surface ◽  
Methane Steam Reforming ◽  
Reduction Treatment ◽  
Highly Active ◽  
Methane Steam ◽  
Oxidation Reduction ◽  
Pre Treatment ◽  
Oxidation In Air

The catalytic activity of oxidation-reduction pre-treated Ni3Al powder for methane steam reforming was examined. The oxidation-reduction pre-treatment consisted of two steps: oxidation in air at various temperatures from 973 to 1373 K, and then followed by reduction in H2 at 873 K. It was found that the oxidation-reduction treatments significantly reduced the onset temperature of activity, i.e., improved the activity of Ni3Al powder at low temperatures. The characterization of Ni3Al surface showed that an outer surface layer of fine NiO particles were formed on the surface of Ni3Al after oxidation. These NiO particles were reduced to metallic Ni by the subsequent reduction treatment, resulting in the high activity for methane steam reforming. These results indicate that the Ni3Al can form highly active surface structure with oxidation-reduction treatment, having excellent heat resistance.

scholarly journals Preparation of Palladium-Impregnated Ceria by Metal Complex Decomposition for Methane Steam Reforming Catalysis

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Worawat Wattanathana ◽  
Suttipong Wannapaiboon ◽  
Chatchai Veranitisagul ◽  
Navadol Laosiripojana ◽  
Nattamon Koonsaeng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Complex ◽  
Steam Reforming ◽  
Organic Ligand ◽  
Methane Steam Reforming ◽  
Microwave Assisted ◽  
Methane Steam ◽  
Bet Specific Surface Area ◽  
Ceria Catalysts

Palladium-impregnated ceria materials were successfully prepared via an integrated procedure between a metal complex decomposition method and a microwave-assisted wetness impregnation. Firstly, ceria (CeO2) powders were synthesized by thermal decomposition of cerium(III) complexes prepared by using cerium(III) nitrate or cerium(III) chloride as a metal source to form a metal complex precursor with triethanolamine or benzoxazine dimer as an organic ligand. Palladium(II) nitrate was consequently introduced to the preformed ceria materials using wetness impregnation while applying microwave irradiation to assist dispersion of the dopant. The palladium-impregnated ceria materials were obtained by calcination under reduced atmosphere of 10% H2 in He stream at 700°C for 2 h. Characterization of the palladium-impregnated ceria materials reveals the influences of the metal complex precursors on the properties of the obtained materials. Interestingly, the palladium-impregnated ceria prepared from the cerium(III)-benzoxazine dimer complex revealed significantly higher BET specific surface area and higher content of the more active Pdδ+ (δ > 2) species than the materials prepared from cerium(III)-triethanolamine complexes. Consequently, it exhibited the most efficient catalytic activity in the methane steam reforming reaction. By optimization of the metal complex precursors, characteristics of the obtained palladium-impregnated ceria catalysts can be modified and hence influence the catalytic activity.

Effect of steam and hydrogen treatments on the catalytic activity of pure Ni honeycomb for methane steam reforming

2018 ◽  
Vol 129 ◽  
pp. 63-70 ◽  
Author(s):  
Ya Xu ◽  
Toshiko Harimoto ◽  
Linsheng Wang ◽  
Toshiyuki Hirano ◽  
Hirotaka Kunieda ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Methane Steam Reforming ◽  
Methane Steam

An Analysis of Heat Transfer Processes in an Internal Indirect Reforming Type Solid Oxide Fuel Cell

2010 ◽  
Author(s):  
Grzegorz Brus ◽  
Zygmunt Kolenda ◽  
Shinji Kimijima ◽  
Janusz S. Szmyd
Keyword(s):  
Steam Reforming ◽  
Solid Oxide ◽  
Methane Steam Reforming ◽  
Oxide Fuel ◽  
Carbon Formation ◽  
Internal Reforming ◽  
Thermal Boundary Conditions ◽  
Methane Steam ◽  
Fuel Flow ◽  
Metal Support

This paper presents experimental and numerical studies on the fuel reforming process on an Ni/YSZ catalyst. Nickel is widely known as a catalyst material for Solid Oxide Fuel Cells. Because of its prices and catalytic properties, Ni is used in both electrodes and internal reforming reactors. However, using Ni as a catalyst carries some disadvantages. Carbon formation is a major problem during a methane/steam reforming reaction based on Ni catalysis. Carbon formation occurs between nickel and metal-support, creating fibers which damage the catalytic property of the reactor. To prevent carbon deposition, the steam-to-carbon ratio is kept between 3 and 5 throughout the entire process. To optimize the reforming reactors, detailed data about the entire reforming process is required. In the present paper kinetics of methane/steam reforming on the Ni/YSZ catalyst was experimentally investigated. Measurements including different thermal boundary conditions, the fuel flow rate and the steam-to-methane ratios were performed. The reforming rate equation derived from experimental data was used in the numerical model to predict synthetic gas composition at the outlet of the reformer.

scholarly journals Enhancement by praseodymium addition of catalytic activity of nickel supported on cerium^|^ndash;zirconium oxide in methane steam reforming

2014 ◽  
Vol 122 (1427) ◽  
pp. 537-542 ◽  
Author(s):  
Tomohiro ISHIYAMA ◽  
Kota KURIMOTO ◽  
Masao KITA ◽  
Shinya OTSUKA-YAO-MATSUO ◽  
Takahisa OMATA
Keyword(s):  
Catalytic Activity ◽  
Steam Reforming ◽  
Zirconium Oxide ◽  
Methane Steam Reforming ◽  
Methane Steam
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