Particle Size Distribution of Glass Spheres,
HighRank Coal, Sand Proppant Samples, and Sized Activated Carbon
John Worthley,
[email protected]
, 04 September 2017
Abstract:
Particle size distribution is necessary for careful analysis in the energy industry. With data from this analysis,
you can find important values such as the MV, the mean diameter of the total “volume distribution” that
determines the center of gravity of the sample; MN, the mean diameter of the “number distribution” that is
weighted to the average of the rest of the sample; MA, the mean diameter of the “area distribution” that
represents the distribution of the surface area of the particles in the sample; SD, the standard deviation that
represents the measure of the width of the distribution; D%, the percentile of the volume that is smaller than
the percent size indicated; and peaks, the height of the peaks on the logarithmic bar graph of multimodal
distributions.
In summary of the relevant data observations, the sample of Glass Spheres yielded the least mean diameter of
the volume distribution along with the lowest standard deviation value; the HighRank Coal had the smallest
mean diameter of the number distribution as well as the smallest area distribution; the Sand Proppant of
Sample 1 had the largest volume distribution, the highest weight to the average of the rest of the sample, the
largest distribution of the surface area of the particles in the sample, and the largest measure of the width of
the distribution; and the sized activated carbon was a normal and symmetrical Gaussian distribution with the
volume of the mean, median, and mode to be comparably parallel.
Introduction:
Particle sizes can vary for all sample sizes. Generally, a value of the average size for that sample would be
enough to represent the sample. However, for extensive applications such as the extraction of energy from
fuel sources, a simple average of the sample size will not be sufficient enough. In this situation, a more
informed analysis can be conducted called the particle size distribution.
In the energy industry, it is important to study the particle size distribution as particle sizes and shapes have a
major influence in the physical and chemical properties that affects the energy extraction.
In terms of highrank coal, the varying particle size significantly affects the ignition and the burning of the fuel.
The differences in sizes factor in differences in behaviors ignition and devolatilization.
2
This is because a larger
particle size can result in an increase to char yield and may result in secondary reactions of volatile matters
within the coal particles.
1
Similarly, with larger particle sizes, the times for drying devolatilization, and burnout
increased.
2
The difference in particle sizes of sand proppant samples has a huge influence in hydraulic fracking. When
fracking, a small hole is drilled into the Earth through multiple layers of sediment. When reaching a bed of
shale, a mixture mainly composed of water and sand proppants is used to restore this hole.
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