99/01977 NiO-alkaline earth oxide catalysts for oxidative methane-to-syngas conversion: influence of alkaline earth oxide on the surface properties and temperature-programmed reduction/reaction by H2 and methane

1999 ◽  
Vol 40 (3) ◽  
pp. 203
Keyword(s):  
Surface Properties ◽  
Alkaline Earth ◽  
Reduction Reaction ◽  
Oxide Catalysts ◽  
Temperature Programmed Reduction ◽  
Alkaline Earth Oxide ◽  
Syngas Conversion ◽  
Temperature Programmed

Preparation of Silica-Supported Nickel Molybdenum Phosphides by Temperature-Programmed Reduction Technique

2007 ◽  
Vol 124-126 ◽  
pp. 1765-1768 ◽  
Author(s):  
So Yeon Lee ◽  
Yong Kul Lee ◽  
S.Ted Oyama ◽  
Seok Hee Lee ◽  
Hee Chul Woo
Keyword(s):  
Single Phase ◽  
Reduction Rate ◽  
Reduction Reaction ◽  
Molar Ratio ◽  
Infrared Spectrometry ◽  
Molybdenum Oxides ◽  
Temperature Programmed Reduction ◽  
X Ray Diffraction ◽  
Ammonium Hydrogen ◽  
Temperature Programmed

Silica supported nickel molybdenum phosphides (NiMoP/SiO2) were successfully prepared by temperature-programmed reduction (TPR) reaction of phosphorous-impregnated nickel molybdenum oxides (NiMoO4) precursors with hydrogen at relatively low temperatures (530 – 590 oC) and characterized by Fourier transform-Infrared spectrometry (FT-IR), X-ray diffraction (XRD), Electron probe microanalysis (EPMA) and Temperature-programmed reduction reaction (TPR). The process of solid transformation and properties of materials prepared from ammonium hydrogen phosphate (AMP)-impregnated samples were compared with those of phosphide made from phosphoric acid (PAC)-impregnated samples. Results show that the formation of a single NiMoP phase on silica significantly depends on reduction rates, phosphorous sources and phosphorous loadings. A single phase of NiMoP on SiO2 was particularly promoted at a below 5 oC/min of reduction rate and the starting molar ratio of Ni/Mo/P=1/1/1. A single phase of crystalline NiMoP on silica was produced from AMP-impregnated samples, while other phases of MoP, Ni2P, or NiMoP2 were appeared from PAC-impregnated samples with loading. The new phase of NiMoP2 was occurred with increasing phosphorous loading (above Ni/Mo/P=1/1/2.5) as a result of facilitated contact on the surface between the Ni-Mo bimetallic component and the phosphorous reagent

Au/iron oxide catalysts: temperature programmed reduction and X-ray diffraction characterization

1999 ◽  
Vol 329 (1) ◽  
pp. 39-46 ◽  
Author(s):  
G Neri ◽  
A.M Visco ◽  
S Galvagno ◽  
A Donato ◽  
M Panzalorto
Keyword(s):  
Iron Oxide ◽  
Oxide Catalysts ◽  
Temperature Programmed Reduction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Programmed

Neodymium doped alkaline-earth oxide catalysts for propane oxidative dehydrogenation. Part I. Catalyst characterisation

2009 ◽  
Vol 359 (1-2) ◽  
pp. 47-54 ◽  
Author(s):  
Bistra Savova ◽  
Diana Filkova ◽  
Dorel Crişan ◽  
Maria Crişan ◽  
Mălina Răileanu ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Alkaline Earth ◽  
Oxide Catalysts ◽  
Propane Oxidative Dehydrogenation ◽  
Alkaline Earth Oxide ◽  
Catalyst Characterisation
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