Particle Size Effect of Hydride Formation and Surface Hydrogen Adsorption of Nanosized Palladium Catalysts: L3 Edge vs K Edge X-ray Absorption Spectroscopy

2009 ◽  
Vol 113 (34) ◽  
pp. 15140-15147 ◽  
Author(s):  
Min Wei Tew ◽  
Jeffrey T. Miller ◽  
Jeroen A. van Bokhoven
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
Absorption Spectroscopy ◽  
Palladium Catalysts ◽  
Hydrogen Adsorption ◽  
Particle Size Effect ◽  
X Ray ◽  
Hydride Formation ◽  
Surface Hydrogen ◽  
X Ray Absorption

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).

Correction Method for Particle-Size Effect in XRF Analysis of Ore Slurries

1987 ◽  
Vol 31 ◽  
pp. 503-506
Author(s):  
Marek Lankosz
Keyword(s):  
Particle Size ◽  
Size Effect ◽  
Fluorescence Analysis ◽  
Particle Size Effect ◽  
Correction Method ◽  
Measured Concentration ◽  
X Ray ◽  
Weight Percentage ◽  
Xrf Analysis

In on–stream X–ray fluorescence analysis of ore slurries, the effects due to variation in the particle-size of solids can cause appreciable and sometimes major errors in the measured concentration of an element to be determined. Weight percentage of slurry ore grains with diameter smaller than 75 um (called later W75) is commonly used as measure of ore fineness and can be determined using particle-size analyzers. A method of correcting for W75 variaition is highly desireable, particularly in a case when high analysis accuracy is required for economical reasons.

A dickite with an elongated crystal habit and its dehydroxylation

1959 ◽  
Vol 32 (247) ◽  
pp. 314-323 ◽  
Author(s):  
E. R. Schmidt ◽  
R. O. Heckroodt
Keyword(s):  
Particle Size ◽  
Chemical Analysis ◽  
Size Effect ◽  
Particle Size Effect ◽  
Crystal Habit ◽  
Electron Microscopic ◽  
X Ray ◽  
Thermal Data ◽  
Endothermal Effect ◽  
Optical Electron

SummaryDickite from a new occurrence at Barkly East, Cape Province, is described and compared with a previously unreported dickite from Postmasburg and a dickite from Ouray, Colorado. The Barkly East dickite crystals are elongated in the direction of the a-axis; the ratio of length to width of crystals varies from 3:1 to 16:1. Optical, electron microscopic, X-ray, and thermal data and a chemical analysis are given. The thermogram of the fraction smaller than 2 µ e.s.d.1 is characterized by a single peak at 600°C., while that of fractions larger than 2 µ e.s.d. shows a double endothermal effect. This two-stage dehydroxylation of dickite on heating is attributed to a particle size effect.

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