Aviation biofuel range cycloalkane from renewables: Liquid-phase catalytic conversion of menthol on niobia-supported catalysts

Fuel ◽  
2020 ◽  
Vol 277 ◽  
pp. 118288
Author(s):  
Catarine B. Gabriel ◽  
Simone J. Canhaci ◽  
Luiz E.P. Borges ◽  
Marco A. Fraga
Keyword(s):  
Liquid Phase ◽  
Supported Catalysts ◽  
Catalytic Conversion ◽  
Aviation Biofuel

Catalytic conversion of aqueous fraction of bio-oil to alcohols over CNT-supported catalysts

Fuel ◽  
2016 ◽  
Vol 180 ◽  
pp. 749-758 ◽  
Author(s):  
Minghao Zhou ◽  
Guomin Xiao ◽  
Kui Wang ◽  
Jianchun Jiang
Keyword(s):  
Supported Catalysts ◽  
Catalytic Conversion ◽  
Aqueous Fraction ◽  
Bio Oil

scholarly journals One-Pot Liquid-Phase Catalytic Conversion of Ethanol to 1-Butanol over Aluminium Oxide—The Effect of the Active Metal on the Selectivity

Catalysts ◽  
2012 ◽  
Vol 2 (1) ◽  
pp. 68-84 ◽  
Author(s):  
Toni Riittonen ◽  
Esa Toukoniitty ◽  
Dipak Kumar Madnani ◽  
Anne-Riikka Leino ◽  
Krisztian Kordas ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Aluminium Oxide ◽  
Catalytic Conversion ◽  
One Pot ◽  
Active Metal

scholarly journals HYDROGEN PRESSURE, SOLVENT AND CATALYST NATURE INFLUENCE ON THE 2-CHLORO-4-NITROANILINE HYDROGENATION REGULARITIES

2018 ◽  
Vol 61 (9-10) ◽  
pp. 30-35
Author(s):  
D.M. Klimushin ◽  
A.I. Krasnov ◽  
D.V. Filippov ◽  
N.Yu. Sharonov
Keyword(s):  
Liquid Phase ◽  
Ethyl Acetate ◽  
Palladium Catalysts ◽  
Metal Content ◽  
Hydrogen Pressure ◽  
Supported Catalysts ◽  
Platinum Catalysts ◽  
Target Product ◽  
Active Metal ◽  
Supported Palladium

The 2-chloro-4-nitroaniline liquid-phase hydrogenation kinetics on supported palladium and platinum catalysts differing in the nature of the carrier and the active metal content was studied for the first time. The experiment was carried out at elevated hydrogen pressures in the range of 9 - 12 atm and 303 K in solvents 2-propanol-water and ethyl acetate in the reactor such as Vishnevsky autoclave. The main kinetic parameters of the reaction have been determined, and the influence of various parameters on the regularities of the process has been established. It is shown that an increase in the active metal content in the catalyst leads to an increase in the rate of the hydrogenation reaction of 2-chloro-4-nitroaniline. When using platinum supported catalysts, the rate of hydrogenation of 2-chloro-4-nitroaniline is significantly higher than when using supported palladium catalysts. The replacement of the liquid phase of the catalyst system with 2-propanol by ethyl acetate adversely affects the reaction rate. The influence of the catalytic system nature and composition on the target product dehalogenation degree was determined. It was found that when carrying out the reaction at elevated hydrogen pressures, it is preferable to use low-percentage platinum catalysts, rather than palladium catalysts, since the former provide less dehalogenation of the target product. For citation: Klimushin D.M., Krasnov A.I., Filippov D.V., Sharonov N.Yu. Hydrogen pressure, solvent and catalyst nature influence on 2-chloro-4-nitroaniline hydrogenation regularities. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 9-10. P. 30-35  

scholarly journals Selective Liquid-Phase Oxidation of Toluene with Molecular Oxygen Catalyzed by Mn3O4 Nanoparticles Immobilized on CNTs under Solvent-Free Conditions

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 623
Author(s):  
Yuwei Feng ◽  
Aiwu Zeng
Keyword(s):  
Electron Microscopy ◽  
Liquid Phase ◽  
Benzyl Alcohol ◽  
Photoelectron Spectroscopy ◽  
Supported Catalysts ◽  
Liquid Phase Oxidation ◽  
X Ray ◽  
Solvent Free Conditions ◽  
Phase Oxidation ◽  
Mn3o4 Nanoparticles

The catalytic performance of Mn3O4 supported on carbon nanotubes (CNTs) in the liquid-phase oxidation of toluene to benzyl alcohol and benzaldehyde was studied. The supported catalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), N2 adsorption–desorption isotherms and ICP-MS. The results demonstrate that Mn3O4 nanoparticles loaded on CNTs performed better compared with pristine Mn3O4 or CNTs. The main reason for the increased catalytic activity is the dispersion and loading of Mn3O4 in CNTs. By optimizing the reaction temperature, reaction time, catalyst quality, oxygen flow rate and initiator dosage, the optimum reaction conditions were obtained. Using tert-butyl hydroperoxide (TBHP) as the initiator and oxygen as the oxidant, the toluene conversion rate was as high as 24.63%, and benzyl alcohol and benzaldehyde selectivity was 90.49%. The good stability of the catalyst was confirmed by repeating the experiment for four cycles and observing no significant changes in its performance.

Performance of Ag/Al2O3 catalysts in the liquid phase oxidation of glycerol – effect of preparation method and reaction conditions

2016 ◽  
Vol 6 (9) ◽  
pp. 3182-3196 ◽  
Author(s):  
E. Skrzyńska ◽  
S. Zaid ◽  
A. Addad ◽  
J.-S. Girardon ◽  
M. Capron ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Crude Glycerol ◽  
High Selectivity ◽  
Preparation Method ◽  
Supported Catalysts ◽  
Periodic Mode ◽  
Good Resistance ◽  
Reaction Conditions ◽  
Acid Stability ◽  
Phase Oxidation

A series of silver supported catalysts have been developed and proposed for mild oxidation of glycerol in the liquid phase. High selectivity to glycolic acid, stability in both continuous-flow and periodic mode of reaction, and good resistance to crude glycerol impurities have been achieved.

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