Particle size effects of PtAg nanoparticles on the catalytic electrooxidation of liquid fuels

2018 ◽  
Vol 5 (5) ◽  
pp. 1174-1179 ◽  
Author(s):  
Pingping Song ◽  
Hui Xu ◽  
Bo Yan ◽  
Jin Wang ◽  
Fei Gao ◽  
...  
Keyword(s):  
Particle Size ◽  
Ethylene Glycol ◽  
Size Effects ◽  
Quantum Confinement ◽  
Electrocatalytic Oxidation ◽  
Liquid Fuels ◽  
Particle Sizes ◽  
Particle Size Effects ◽  
Linear Decrease

The electrocatalytic oxidation of ethylene glycol and glycerol in the presence of PtAg NPs catalyst showed a linear decrease with the increasing particle sizes, providing new clues and hypotheses on how quantum confinement phenomena affect the electrocatalytic performances.

Investigation of Particle Size Effects on Solid Particle Erosion of Elbows in Series for Liquid-Solid Flows

2021 ◽  
Author(s):  
Yeshwanthraj Rajkumar ◽  
Soroor Karimi ◽  
Siamack A. Shirazi
Keyword(s):  
Particle Size ◽  
Solid Particle ◽  
Size Effects ◽  
Oil And Gas ◽  
Solid Particles ◽  
Solid Particle Erosion ◽  
Particle Sizes ◽  
Particle Erosion ◽  
Particle Size Effects ◽  
In Series

Abstract The entrainment of solid particles within the produced fluids can cause solid particle erosion by impacting the piping of production and transportation facilities. Liquid dominated flows are commonly encountered in deep water subsea pipelines while producing oil and gas fluids. It is of great importance to predict the erosion pattern and magnitude for elbows in series in liquid-solid flows as in the oil and gas productions, liquids tends to produce more solid particles compared to gas-solid flows. In the current work, erosion of elbows in series for different particle sizes are investigated by using computational fluid dynamics (CFD) and compare the erosion pattern results with the results of paint removal experiments using a 76.2 mm diameter acrylic elbows, qualitatively. CFD simulations have been performed to study the particle size effects on erosion using Reynolds stress turbulence model (RSM) and Low-Reynolds number K-ε model. Grid refinement studies have been performed and particles are rebounded at the particle radius to accurately examine the effects of particle sizes on solid particle erosion of these elbows. The CFD results shows that significant erosion is observed at the inner wall of the first elbow for larger particles, and the maximum erosion can be seen towards the end of the second elbow for 300 μm particle size.

scholarly journals Low intensity, continuous wave photodoping of ZnO quantum dots – photon energy and particle size effects

2017 ◽  
Vol 19 (6) ◽  
pp. 4494-4499 ◽  
Author(s):  
Matías E. Aguirre ◽  
S. Municoy ◽  
M. A. Grela ◽  
A. J. Colussi
Keyword(s):  
Quantum Dots ◽  
Particle Size ◽  
Ethylene Glycol ◽  
Photon Energy ◽  
Size Effects ◽  
Continuous Wave ◽  
Excess Energy ◽  
Electron Densities ◽  
Particle Size Effects ◽  
Low Intensity

Ethylene glycol capped quantum dots (1.7 < r (nm) < 2.7) are photocharged with electron densities that depend sigmoidally on the excess energy, E*, reaching at E* = 0.5 eV.

Adsorption mechanism of two pesticides on polyethylene and polypropylene microplastics: DFT calculations and particle size effects

2021 ◽  
Vol 291 ◽  
pp. 118120
Author(s):  
Qiming Mo ◽  
Xingjian Yang ◽  
Jinjin Wang ◽  
Huijuan Xu ◽  
Wenyan Li ◽  
...  
Keyword(s):  
Particle Size ◽  
Dft Calculations ◽  
Size Effects ◽  
Adsorption Mechanism ◽  
Particle Size Effects

Particle size effects in the selective hydrogenation of cinnamaldehyde over supported palladium catalysts

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75541-75551 ◽  
Author(s):  
Feng Jiang ◽  
Jian Cai ◽  
Bing Liu ◽  
Yuebing Xu ◽  
Xiaohao Liu
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
Selective Hydrogenation ◽  
Size Effects ◽  
Palladium Catalysts ◽  
Particle Size Effect ◽  
Particle Size Effects ◽  
Supported Palladium Catalysts ◽  
Supported Palladium ◽  
Palladium Particles

Palladium particles of different sizes obtained directly and indirectly by various methods were studied to clarify the particle size effect in the selective hydrogenation of cinnamaldehyde (CAL).

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