Mechanism and kinetics of the growth of zeolite microcrystals
作者： S Bosnar , B Subotic
DOI: 10.1016/S1387-1811(98)00338-2
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摘要: Abstract The kinetics of the crystal growth zeolite A were measured during crystallization at 80°C from an amorphous aluminosilicate precursor (1.03Na 2 O·Al O 3 ·2.38SiO ·1.66H O) dispersed in 1.2 M (system I), 1.4 M II), 1.6 M III), 1.8 M IV) and 2 M V) NaOH solutions. Analysis experimental results (changes concentrations C Al aluminum Si silicon liquid phase as well dimension L m largest crystals crystallization) shows that rate is independent size, governed by reaction monomeric and/or low-molecular aluminate, silicate anions on surfaces growing crystals. takes place accordance with model Davies Jones for dissolution, taking into consideration particularities crystallizing systems, zeolites can be defined d L/ t c =k g [C −C ∗][C ∗], where ∗ are which correspond to solubility given conditions, k constant linear
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