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Herstellung von Formkörpern mit definierter Porenstruktur
Author(s) -
Hammon Ulrich,
Kotter Michael
Publication year - 1984
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330560607
Subject(s) - pellets , materials science , macropore , extrusion , porosity , pelletizing , fabrication , sintering , chemical engineering , composite material , chemistry , mesoporous material , organic chemistry , catalysis , pathology , engineering , medicine , alternative medicine
Fabrication of pellets with defined pore‐size distribution. The fabrication of porous alumina‐pellets of high mechanical strength and with a well defined pore‐size distribution by pelletization and by extrusion is described. Macropores can be introduced through solid material which is vaporized after agglomeration; the content of macropores can thereby be chosen within a rather wide range. The amount of micropores in the pellets can be controlled by thermal treatment (sintering). Mechanical strength is obtained if the primary particles are connected by bridges of solid material, generated from substances dissolved in the liquid which fills the pores before drying. The mechanism and the procedure leading to the formation of porous alumina‐pellets are also applicable if silica or zeolites are to be agglomerated into porous pellets of high mechanical strength.