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Filter Cake Washing of Mesoporous Particles
Author(s) -
Noerpel S.,
Siauw V.,
Nirschl H.
Publication year - 2012
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201100467
Subject(s) - mesoporous material , impurity , chemical engineering , particle size , filter cake , particle (ecology) , chromatography , filter (signal processing) , materials science , void (composites) , chemistry , adsorption , composite material , organic chemistry , catalysis , oceanography , computer science , engineering , computer vision , geology
Particle synthesis in liquid phase usually requires a subsequent washing step in order to remove undesirable impurities such as unreacted educts, byproducts, solvents and salts. In particular, the washing of mesoporous particles is a challenging task due to large specific surface areas and void volumes. The filter cake washing of mesoporous SiO 2 particles contaminated either with an adsorbing fluorescent dye or sodium sulfate is presented. The effects of wash liquid mass flow rate, mean particle size, and mean pore size on the wash efficiency were investigated. Especially the interaction between impurities and the solid surface, and thereby the initial impurity distribution within the filter cake, led to distinctive washing behaviors.