TY - JOUR
T1 - Relationship between mechanical properties and shape descriptors of granules obtained by fluidized bed wet granulation
AU - Téllez-Medina, Darío I.
AU - Byrne, Edmond
AU - Fitzpatrick, John
AU - Catak, Muammer
AU - Cronin, Kevin
N1 - Funding Information:
Authors thank to Science Foundation Ireland (SFI) for the financial funding provided. Mr. Darío I. Téllez-Medina thanks also the economic support from the Mexican National Council for Science and Technology (CONACYT) .
PY - 2010/11/1
Y1 - 2010/11/1
N2 - This paper focuses on two mechanical properties of granules, the coefficient of restitution and the strength, and analyzes their sensitivity to granule geometric parameters. The granules were obtained by fluid bed granulation of glass beads with an aqueous solution of PEG1500. Collisions were arranged between granules, and for granules against two glass plates, the first of them a non-covered plate, whereas the second was a plate covered with a thin film of PEG1500. The coefficient of restitution and the strength were measured for the granules, the former for individual particles also. In the case of individual glass particles the coefficient of restitution was around 0.61 for impacts on the flat glass, and 0.5 on the covered glass; for the granules, this parameter was around 0.44 for both situations and for collisions between granules. Sphericity, lacunarity and fractal dimension of the granule projected area, as well as the granule porosity, were determined. Granules giving the highest values for strength had the largest fractal dimension and the smallest lacunarity values regardless of their sphericity, porosity and coefficient of restitution.
AB - This paper focuses on two mechanical properties of granules, the coefficient of restitution and the strength, and analyzes their sensitivity to granule geometric parameters. The granules were obtained by fluid bed granulation of glass beads with an aqueous solution of PEG1500. Collisions were arranged between granules, and for granules against two glass plates, the first of them a non-covered plate, whereas the second was a plate covered with a thin film of PEG1500. The coefficient of restitution and the strength were measured for the granules, the former for individual particles also. In the case of individual glass particles the coefficient of restitution was around 0.61 for impacts on the flat glass, and 0.5 on the covered glass; for the granules, this parameter was around 0.44 for both situations and for collisions between granules. Sphericity, lacunarity and fractal dimension of the granule projected area, as well as the granule porosity, were determined. Granules giving the highest values for strength had the largest fractal dimension and the smallest lacunarity values regardless of their sphericity, porosity and coefficient of restitution.
KW - Coefficient of restitution
KW - Fractal dimension
KW - Granule strength
KW - Lacunarity
KW - Wet granulation
UR - http://www.scopus.com/inward/record.url?scp=77958152604&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2009.11.035
DO - 10.1016/j.cej.2009.11.035
M3 - Artículo
SN - 1385-8947
VL - 164
SP - 425
EP - 431
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
IS - 2-3
ER -