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Effects of reactor type and mass transfer on the morphology of CuS and ZnS crystals
Author(s) -
AlTarazi Mousa,
Heesink A. Bert M.,
Versteeg Geert F.
Publication year - 2005
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200410421
Subject(s) - mass transfer , precipitation , morphology (biology) , chemistry , bubble , laminar flow , chemical engineering , economies of agglomeration , continuous reactor , metal , crystal (programming language) , analytical chemistry (journal) , chromatography , catalysis , thermodynamics , organic chemistry , meteorology , mechanics , physics , biology , engineering , genetics , computer science , programming language
For the precipitation of CuS and ZnS, the effects of the reactor/precipitator type, mass transfer and process conditions on crystal morphology were studied. Either H 2 S gas or a S 2– solution were applied. Three different types of reactors have been tested, namely a laminar jet, a bubble column and an MSMPR reactor. The choice of reactor type as well as mass transfer and metal concentration all have a considerable influence on the morphology of the produced crystals. A well mixed bubble column with H 2 S containing gas as feed yields the coarsest crystals. Use is then made of the surface active properties of CuS‐particles, which induce agglomeration at the gas‐liquid interface, where as the low metal concentrations inside the reactor also contribute to the formation of coarser particles (especially for ZnS). (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)