scholarly journals Liquid‐Phase Cyclohexene Oxidation with O2 over Spray‐Flame‐Synthesized La1‐xSrxCoO3 Perovskite Nanoparticles

2021 ◽  
Author(s):  
Julia Büker ◽  
Baris Alkan ◽  
Sonia Chabbra ◽  
Nikolai Kochetov ◽  
Tobias Falk ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Cyclohexene Oxidation ◽  
Spray Flame ◽  
Perovskite Nanoparticles

Selective cyclohexene oxidation with O2, H2O2 and tert-butyl hydroperoxide over spray-flame synthesized LaCo1−xFexO3 nanoparticles

2020 ◽  
Vol 10 (15) ◽  
pp. 5196-5206 ◽  
Author(s):  
Julia Büker ◽  
Baris Alkan ◽  
Qi Fu ◽  
Wei Xia ◽  
Jonas Schulwitz ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Cyclohexene Oxidation ◽  
Butyl Hydroperoxide ◽  
Oxidizing Agents ◽  
Tert Butyl ◽  
Spray Flame ◽  
Tert Butyl Hydroperoxide

A series of spray-flame made LaCo1−xFexO3 nanoparticles showed promising activity for liquid-phase cyclohexene oxidation. Various oxidizing agents, i.e., O2, H2O2 and tert-butyl hydroperoxide, led to different product selectivities.

scholarly journals On the Structure of Turbulent Combusting Unconfined Sprays

1991 ◽  
Author(s):  
S. K. Aggarwal ◽  
S. Chitre
Keyword(s):  
Liquid Phase ◽  
Gas Phase ◽  
Computational Study ◽  
Flame Structure ◽  
Transient Liquid Phase ◽  
Phase Model ◽  
Two Phase ◽  
Spray Flame ◽  
Partial Equilibrium Model ◽  
Evaporating Spray

Computations are reported on the detailed structures of unconfined turbulent combusting sprays. Favre-averaged gas-phase equations are used and a k-ε-g turbulence closure model is utilized. Using a conserved scalar approach and assuming the form of probability density function to be a clipped Gaussian, the thermodynamic scalar variables are calculated from a partial equilibrium model. The major features of the liquid-phase model are that a stochastic random-walk approach is used to represent the effect of gas-phase turbulence on droplet trajectory and vaporization, the variable-property effects are considered in a comprehensive manner, and a conduction-limit mode is employed to represent the transient liquid-phase processes. This two-phase model is used to study the structure of an unconfined methanol spray flame. Important observation is that the turbulent spray flame structure is significantly different, both quantitatively and qualitatively, from that of the corresponding gaseous diffusion flame. In addition, the spray flame exhibits a strong sensitively to the transient liquid-phase processes. The latter result is interesting since, in an earlier computational study for an evaporating spray, the vaporization behavior for the same liquid fuel indicated only a weak sensitivity to these processes.

scholarly journals Spray‐Flame‐Prepared LaCo 1– x Fe x O 3 Perovskite Nanoparticles as Active OER Catalysts: Influence of Fe Content and Low‐Temperature Heating

2020 ◽  
Vol 7 (12) ◽  
pp. 2564-2574 ◽  
Author(s):  
Baris Alkan ◽  
Danea Medina ◽  
Joachim Landers ◽  
Markus Heidelmann ◽  
Ulrich Hagemann ◽  
...  
Keyword(s):  
Low Temperature ◽  
Spray Flame ◽  
Fe Content ◽  
Perovskite Nanoparticles ◽  
Temperature Heating

The effect of redox properties of ceria-supported vanadium oxides in liquid phase cyclohexene oxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63382-63392 ◽  
Author(s):  
Sanaa El-Korso ◽  
Sumeya Bedrane ◽  
Abderrahim Choukchou-Braham ◽  
Redouane Bachir
Keyword(s):  
Liquid Phase ◽  
Vanadium Oxides ◽  
Redox Properties ◽  
Allylic Oxidation ◽  
Cyclohexene Oxidation ◽  
Redox Catalysts

In the presence of redox catalysts, cyclohexene oxidation leads to an epoxidation product, while in the presence of acidic features; the allylic oxidation is predominant and leads to cyclohexenol and cyclohexenone.

Spray‐Flame‐Synthesized LaCo 1− x Fe x O 3 Perovskite Nanoparticles as Electrocatalysts for Water and Ethanol Oxidation

2019 ◽  
Vol 6 (16) ◽  
pp. 4266-4274 ◽  
Author(s):  
Baris Alkan ◽  
Steffen Cychy ◽  
Swapnil Varhade ◽  
Martin Muhler ◽  
Christof Schulz ◽  
...  
Keyword(s):  
Ethanol Oxidation ◽  
Spray Flame ◽  
Perovskite Nanoparticles

Liquid phase cyclohexene oxidation over vanadia based catalysts with tert-butyl hydroperoxide: Epoxidation versus allylic oxidation

2014 ◽  
Vol 394 ◽  
pp. 89-96 ◽  
Author(s):  
Sanaa El-Korso ◽  
Ilyes Khaldi ◽  
Sumeya Bedrane ◽  
Abderrahim Choukchou-Braham ◽  
Frédéric Thibault-Starzyk ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Allylic Oxidation ◽  
Cyclohexene Oxidation ◽  
Butyl Hydroperoxide ◽  
Tert Butyl ◽  
Tert Butyl Hydroperoxide

Elucidation of block boundaries as the dissolution channels in hydrated cement

1978 ◽  
Vol 36 (1) ◽  
pp. 484-485
Author(s):  
N.V. Belov ◽  
U.I. Papiashwili ◽  
B.E. Yudovich
Keyword(s):  
Liquid Phase ◽  
Grain Boundaries ◽  
Benzoyl Peroxide ◽  
Phase Contrast ◽  
Active Role ◽  
Point Of View ◽  
Hardened Cement ◽  
Hydrated Cement ◽  
Hardened Cement Paste

It has been almost universally adopted that dissolution of solids proceeds with development of uniform, continuous frontiers of reaction.However this point of view is doubtful / 1 /. E.g. we have proved the active role of the block (grain) boundaries in the main phases of cement, these boundaries being the areas of hydrate phases' nucleation / 2 /. It has brought to the supposition that the dissolution frontier of cement particles in water is discrete. It seems also probable that the dissolution proceeds through the channels, which serve both for the liquid phase movement and for the drainage of the incongruant solution products. These channels can be appeared along the block boundaries.In order to demonsrate it, we have offered the method of phase-contrast impregnation of the hardened cement paste with the solution of methyl metacrylahe and benzoyl peroxide. The viscosity of this solution is equal to that of water.

Identification of hepatitis a virus in cell cultures by solid phase immune electron microscopy

1986 ◽  
Vol 44 ◽  
pp. 238-239
Author(s):  
C.D. Humphrey ◽  
T.L. Cromeans ◽  
E.H. Cook ◽  
D.W. Bradley
Keyword(s):  
Electron Microscopy ◽  
Liquid Phase ◽  
Cell Cultures ◽  
Rapid Detection ◽  
Hepatitis A ◽  
Hepatitis A Virus ◽  
Solid Phase ◽  
Immune Electron Microscopy ◽  
Detection And Identification

There is a variety of methods available for the rapid detection and identification of viruses by electron microscopy as described in several reviews. The predominant techniques are classified as direct electron microscopy (DEM), immune electron microscopy (IEM), liquid phase immune electron microscopy (LPIEM) and solid phase immune electron microscopy (SPIEM). Each technique has inherent strengths and weaknesses. However, in recent years, the most progress for identifying viruses has been realized by the utilization of SPIEM.

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