Hydrogen production by ammonia decomposition using high surface area Mo2N and Co3Mo3N catalysts

2016 ◽  
Vol 6 (5) ◽  
pp. 1496-1506 ◽  
Author(s):  
Seetharamulu Podila ◽  
Sharif F. Zaman ◽  
Hafedh Driss ◽  
Yahia A. Alhamed ◽  
Abdulrahim A. Al-Zahrani ◽  
...  
Keyword(s):  
Citric Acid ◽  
Hydrogen Production ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Ammonia Decomposition ◽  
Molybdenum Nitride ◽  
Ammonium Heptamolybdate ◽  
Temperature Programmed

High surface area bulk molybdenum nitride catalysts were synthesized via temperature-programmed ammonolysis of an ammonium heptamolybdate and citric acid (CA) composite.

Development of high surface area bulk W2N catalysts for hydrogen production from ammonia decomposition

2020 ◽  
Vol 45 (32) ◽  
pp. 16219-16226
Author(s):  
Seetharamulu Podila ◽  
Hafedh Driss ◽  
Sharif F. Zaman ◽  
Abdulrahim A. Al-Zahrani ◽  
Muhammad A. Daous ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Ammonia Decomposition

scholarly journals Characteristics of High Surface Area Molybdenum Nitride and Its Activity for the Catalytic Decomposition of Ammonia

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 192
Author(s):  
Seo-Hyeon Baek ◽  
Kyunghee Yun ◽  
Dong-Chang Kang ◽  
Hyejin An ◽  
Min Bum Park ◽  
...  
Keyword(s):  
Surface Area ◽  
Photoelectron Spectroscopy ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Decomposition ◽  
Molybdenum Nitride ◽  
X Ray ◽  
Temperature Programmed Oxidation ◽  
Oxidation Reduction ◽  
Temperature Programmed

High surface area (>170 m2 g−1) molybdenum nitride was prepared by the temperature-programmed nitridation of α-MoO3 with pure ammonia. The process was optimized by adjusting the experimental variables: the reaction temperature, heating rate, and molar flow rate of ammonia. The physicochemical properties of the as-formed molybdenum nitride were characterized by X-ray diffraction, N2 sorption, transmission electron microscopy, temperature-programmed oxidation/reduction, and X-ray photoelectron spectroscopy. Of the experimental variables, the nitridation temperature was found to be the most critical parameter determining the surface area of the molybdenum nitride. When the prepared molybdenum nitride was exposed to air, the specific surface area rapidly decreased because of the partial oxidation of molybdenum nitride to molybdenum oxynitride. However, the surface area recovered to 90% the initial value after H2 treatment. The catalyst with the highest degree of nitridation showed the best catalytic activity, superior to that of unmodified α-MoO3, for the decomposition of ammonia because of its high surface area.

Structure Effects of High Surface Area Molybdenum Nitride Powders, Macrocrystals and Nanoparticles as Catalysts for Thiophene Desulfurization

1998 ◽  
Vol 549 ◽  
Author(s):  
K. L. Roberts ◽  
E. J. Markel
Keyword(s):  
Surface Area ◽  
Specific Activity ◽  
High Surface ◽  
High Surface Area ◽  
Lower Surface ◽  
Metal Catalysts ◽  
Molybdenum Nitride ◽  
Temperature Programmed ◽  
Thiophene Hds ◽  
N Powder

AbstractMo2N powder, macrocrystals and nanoparticles and porous Mo metal were synthesized using temperature programmed reduction of MoO3 powder and crystals with reactant feed gases consisting of NH3 N2/H2 mixtures and pure H2. The Mo-based catalysts were characterized using BET, XRD, TGA, SEM, and STM. The Mo-based catalysts were also analyzed for the hydrodesulfurization (HDS) of thiophene. The relatively lower surface area Mo2N macrocrystalline catalysts (SSA = 44 m2/g) have a greater area specific activity than that of the higher surface area Mo2N powder catalysts (SSA = 150 m2/g) for the HDS of thiophene. Mo metal catalysts have significantly lower activity for thiophene HDS than Mo 2N catalysts and the HDS selectivities of non-sulfided Mo metal catalysts are significantly different from those of Mo 2N catalysts.

Ni supported high surface area CeO2–ZrO2 catalysts for hydrogen production from ethanol steam reforming

RSC Advances ◽  
2012 ◽  
Vol 2 (21) ◽  
pp. 8145 ◽  
Author(s):  
Mohamed A. Ebiad ◽  
Dalia R. Abd El-Hafiz ◽  
Radwa A. Elsalamony ◽  
Lamia. S. Mohamed
Keyword(s):  
Hydrogen Production ◽  
Surface Area ◽  
Steam Reforming ◽  
High Surface ◽  
High Surface Area ◽  
Ethanol Steam Reforming ◽  
Ethanol Steam

scholarly journals Photoreforming of Glucose over CuO/TiO2

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 477 ◽  
Author(s):  
Elnaz Bahadori ◽  
Gianguido Ramis ◽  
Danny Zanardo ◽  
Federica Menegazzo ◽  
Michela Signoretto ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Economic Analysis ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Lower Surface ◽  
Flame Synthesis ◽  
Biomass Hydrolysis ◽  
Model Molecule

Hydrogen production has been investigated through the photoreforming of glucose, as model molecule representative for biomass hydrolysis. Different copper- or nickel-loaded titania photocatalysts have been compared. The samples were prepared starting from three titania samples, prepared by precipitation and characterized by pure Anatase with high surface area, or prepared through flame synthesis, i.e., flame pyrolysis and the commercial P25, leading to mixed Rutile and Anatase phases with lower surface area. The metal was added in different loading up to 1 wt % following three procedures that induced different dispersion and reducibility to the catalyst. The highest activity among the bare semiconductors was exhibited by the commercial P25 titania, while the addition of 1 wt % CuO through precipitation with complexes led to the best hydrogen productivity, i.e., 9.7 mol H2/h kgcat. Finally, a basic economic analysis considering only the costs of the catalyst and testing was performed, suggesting CuO promoted samples as promising and almost feasible for this application.

A Model for the Temperature-Programmed Reduction of Low and High Surface Area Ceria

2000 ◽  
Vol 193 (2) ◽  
pp. 273-282 ◽  
Author(s):  
Francesca Giordano ◽  
Alessandro Trovarelli ◽  
Carla de Leitenburg ◽  
Massimiliano Giona
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Temperature Programmed Reduction ◽  
Temperature Programmed
Sign in / Sign up

Export Citation Format

Share Document