Determination of nucleation, growth, agglomeration and disruption kinetics from experimental precipitation data: the calcium oxalate system

摘要: Abstract The precipitation kinetics of calcium oxalate CaC 2 O 4 are studied at the laboratory scale using a 300 ml draft tube baffled (DTB) reactor. vessel which is operated continuously 37°C different residence times, feed concentrations, stirrer speeds and with point locations inside outside tube. A new procedure introduced to solve inverse problem determine kinetic parameters for nucleation, growth, agglomeration disruption from particle size distribution. Crystal growth rates indicate surface-integration-controlled mechanism second-order dependence on absolute supersaturation, while nucleation dependent power input position, therefore suggest mixing-controlled process. obtained account breakage due both splitting attrition, increase linearly input. rates, in contrast, exhibit maximum increasing inputs. Thus, it inferred that decreased efficiency increased lead decrease number agglomerates observed higher speeds.