TY - JOUR
T1 - Crystallization kinetics of ZnS precipitation; an experimental study using the mixed-suspension-mixed-product-removal (MSMPR) method
AU - Tarazi, Mousa Al-
AU - Heesink, A. Bert M.
AU - Azzam, Mohammed O.J.
AU - Yahya, Salah Abu
AU - Versteeg, Geert F.
N1 - Relation: http://www.rug.nl/fmns-research/itm/index
Rights: University of Groningen, Research Institute of Technology and Management
PY - 2004
Y1 - 2004
N2 - The precipitation kinetics of zinc sulfide were studied using a lab scale mixed-suspension-mixed-product-removal (MSMPR) precipitation reactor. The vessel was operated at different feed concentrations, molar ratios, stirrer speeds, pH-values, feed injection positions and residence times. Primary nucleation and volume average crystal growth rates as well as agglomeration kernel were determined. Relationships were found between the rates of the different crystallization steps on the one hand and supersaturation, stirrer speeds, pH-values, Zn2+ to S2- ratio, feed positions on the other. These show that larger crystals are obtained at high supersaturation, moderate stirrer speeds, small residence times, a pH-value of around 5 and high Zn2+ to S2- ratios. One should realize though that the applied MSMPR method is not the most optimal technique for examining fast precipitation reactions.
AB - The precipitation kinetics of zinc sulfide were studied using a lab scale mixed-suspension-mixed-product-removal (MSMPR) precipitation reactor. The vessel was operated at different feed concentrations, molar ratios, stirrer speeds, pH-values, feed injection positions and residence times. Primary nucleation and volume average crystal growth rates as well as agglomeration kernel were determined. Relationships were found between the rates of the different crystallization steps on the one hand and supersaturation, stirrer speeds, pH-values, Zn2+ to S2- ratio, feed positions on the other. These show that larger crystals are obtained at high supersaturation, moderate stirrer speeds, small residence times, a pH-value of around 5 and high Zn2+ to S2- ratios. One should realize though that the applied MSMPR method is not the most optimal technique for examining fast precipitation reactions.
KW - zinc sulfide
KW - agglomeration
KW - growth
KW - nucleation
KW - precipitation kinetics
U2 - 10.1002/crat.200310238
DO - 10.1002/crat.200310238
M3 - Article
VL - 39
SP - 675
EP - 685
JO - Crystal Research and Technology
JF - Crystal Research and Technology
IS - 8
ER -