The Oxidative Ammonolysis of Ethylene to Acetonitrile over γ-Al2O3-Supported Molybdenum Catalysts

1996 ◽  
pp. 319-329
Author(s):  
I. Peeters ◽  
J. van Grondelle ◽  
R. A. van Santen
Keyword(s):  
Oxidative Ammonolysis ◽  
Molybdenum Catalysts

Oxidative desulfurization of motor fuels by air oxygen on vanadium-molybdenum catalysts

2019 ◽  
pp. 34-37
Author(s):  
M.V. Vishnetskaya ◽  
◽  
P.A. Vakhrushin ◽  
O.V. Matrosova ◽  
◽  
...  
Keyword(s):  
Oxidative Desulfurization ◽  
Motor Fuels ◽  
Molybdenum Catalysts

Study of nickel-molybdenum catalysts for methanation of carbon monoxide

1980 ◽  
Vol 45 (3) ◽  
pp. 783-790 ◽  
Author(s):  
Petr Taras ◽  
Milan Pospíšil
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Mixed Oxides ◽  
Minor Component ◽  
Fast Neutrons ◽  
Scanning Calorimetry ◽  
Low Concentrations ◽  
Γ Rays ◽  
Molybdenum Catalysts ◽  
Kinetics Of

Catalytic activity of nickel-molybdenum catalysts for methanation of carbon monoxide and hydrogen was studied by means of differential scanning calorimetry. The activity of NiMoOx systems exceeds that of carrier-free nickel if x < 2, and is conditioned by the oxidation degree of molybdenum, changing in dependence on the composition in the region Mo-MoO2. The activity of the catalysts is adversely affected by irradiation by fast neutrons, dose 28.1 Gy, or by γ rays using doses in the region 0.8-52 kGy. The system is most susceptible to irradiation in the region of low concentrations of the minor component (about 1 mol.%). The dependence of changes in catalytic activity of γ-irradiated samples on the dose exhibits a maximum in the range of 2-5 kGy. The changes in catalytic activity are stimulated by the change of reactivity of the starting mixed oxides, leading to different kinetics of their reduction and modification of their adsorption properties. The irradiation of the catalysts results in lowered concentration of the active centres for the methanation reaction.

The effect of composition of cobalt-molybdenum catalysts on their surface acidity and isomerisation activity

1980 ◽  
Vol 45 (3) ◽  
pp. 697-702 ◽  
Author(s):  
Vlastimil Vyskočil ◽  
Miroslav Zdražil
Keyword(s):  
Chromatographic Method ◽  
Surface Acidity ◽  
Parallel Reaction ◽  
Molybdenum Catalysts ◽  
The Difference ◽  
Kinetics Of ◽  
Alumina Catalysts

Kinetics of isomerisation of cyclohexene to methylcyclopentene proceeding as parallel reaction to hydrogenation of cyclohexene to cyclohexane on cobalt-molybdenum catalysts of different composition has been measured. The surface acidity of these catalysts was estimated from the difference in the adsorption of toluene and heptane which was measured by chromatographic method. In a series of catalysts containing molybdenum the acidity parallels isomerisation activity. Cobalt on alumina catalysts and alumina itself have greater acidity but exhibit lower isomerisation activity compared to the catalysts containing molybdenum.

THE EFFECT OF PRETREATMENT CONDITIONS ON THE FTS ACTIVITY AND SELECTIVITY OF CHARCOAL AND TITANIA SUPPORTED MOLYBDENUM CATALYSTS

1986 ◽  
Vol 48 (1-3) ◽  
pp. 165-175
Author(s):  
JO-WEI DUN ◽  
K.Y.S. NG ◽  
ERDOGAN GULARI
Keyword(s):  
Molybdenum Catalysts ◽  
Pretreatment Conditions

Converting Cyclohexanone to Liquid Fuel-Grade Products: A Characterization and Comparison Study of Hydrotreating Molybdenum Catalysts

2021 ◽  
Author(s):  
Ali Bakhtyari ◽  
Adele Sakhayi ◽  
Zohre Moravvej ◽  
Mohammad Reza Rahimpour
Keyword(s):  
Liquid Fuel ◽  
Comparison Study ◽  
Molybdenum Catalysts

scholarly journals Extraction Methods and Their Influence on Yield When Extracting Thermo-Vacuum-Modified Chestnut Wood

Forests ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 73
Author(s):  
Maurizio D’Auria ◽  
Marisabel Mecca ◽  
Maria Roberta Bruno ◽  
Luigi Todaro
Keyword(s):  
Catalyst Support ◽  
Castanea Sativa ◽  
Extraction Methods ◽  
Extraction Technique ◽  
Extraction Techniques ◽  
Surface Color ◽  
Ms Analysis ◽  
Castanea Sativa Mill ◽  
Molybdenum Catalysts ◽  
Chestnut Wood

Improvements in the yield and solubility of chestnut wood extractives, by using different extraction methods and molybdenum catalysts as support, have rarely been reported in literature. Many studies focus on the different parts of trees, except for the chemical characteristics of the remaining extractives achieved from thermally modified (THM) chestnut (Castanea sativa Mill) wood. This research seeks to better understand the effects of extraction techniques and catalysts on the yield and solubility of extractives. GC-MS analysis of the chloroform soluble and insoluble fractions was also used. Accelerated Solvent Extraction (ASE) 110 °C, Soxhlet, and autoclave extraction techniques were used to obtain extractives from untreated and thermally modified (THM) chestnut wood (170 °C for 3 h). Ethanol/H2O, ethanol/toluene, and water were the solvents used for each technique. A polyoxometalate compound (H3PMo12O40) and MoO3 supported on silica were used as catalysts. The THM induced a change in the wood’s surface color (ΔE = 21.5) and an increase in mass loss (5.9%), while the equilibrium moisture content (EMC) was reduced by 17.4% compared to the control wood. The yields of the extractives and their solubility were always higher in THM and mainly used ASE as the technique. GC-MS analysis of the extractives, without catalyst support, showed different results for each extraction technique and type of wood (untreated and THM). Ultimately, the amount of extractive compound dissolved in each solvent will differ, and the choice of extraction technique will depend on the intended final application of the extracted chemical product.

Unique bimetallic nickel—chromium and nickel—molybdenum catalysts for hydrogenation in the liquid phase

1989 ◽  
Vol 53 (2-3) ◽  
pp. 217-231 ◽  
Author(s):  
J.M. Bonnier ◽  
J. Court ◽  
P.T. Wierzchowski ◽  
S. Hamar-Thibault
Keyword(s):  
Liquid Phase ◽  
Nickel Chromium ◽  
Molybdenum Catalysts

ChemInform Abstract: CO2 Hydrogenation into Methanol on Supported Nickel-Molybdenum Catalysts.

ChemInform ◽  
2010 ◽  
Vol 22 (21) ◽  
pp. no-no
Author(s):  
M. GHAZI ◽  
J. BARRAULT ◽  
J. C. MENEZO
Keyword(s):  
Co2 Hydrogenation ◽  
Molybdenum Catalysts

Oxidative ammonolysis of methylpyrazine over binary catalytic systems: III. Phosphorus-molybdenum system: Catalytic properties and the active component

2000 ◽  
Vol 41 (2) ◽  
pp. 222-230 ◽  
Author(s):  
V. M. Bondareva ◽  
T. V. Andrushkevich ◽  
N. N. Chumachenko ◽  
R. I. Maksimovskaya ◽  
L. M. Plyasova ◽  
...  
Keyword(s):  
Active Component ◽  
Catalytic Properties ◽  
Catalytic Systems ◽  
Oxidative Ammonolysis
Sign in / Sign up

Export Citation Format

Share Document