Vliv hydrodynamických podmínek na růst sádrovce

Jarmila Pospíšilová, Jiří Faimon

Abstrakt

The interaction of gypsum (CaSO4.2H2O) with water is controlled by mixed transport-surface reaction kinetics. Therefore, the rate of gypsum growth/precipitation should depend on hydrodynamic conditions. Gypsum nucleation and crystal growth were studied in a batch reactor under ambient conditions in dependence on varying hydrodynamic conditions (advection of solution). The statistically significant dependence (R2 = 0.875), u = 4.10-7 v+0.0007 (where u is crystal growth rate in mol/min and v is stirring rate in rpm) was found for gypsum growth rate and stirring rate of solution. In contrast, induction times at gypsum nucleation were slightly increasing, i.e., nucleation rates decreased with increasing stirring rate. However, no statistically significant dependence (R2 = 0.115) was found.

Bibliografická citace

Pospíšilová, J., & Faimon, J. (2016). Vliv hydrodynamických podmínek na růst sádrovce. Geologické výzkumy na Moravě a ve Slezsku, 18(2). Získáno z https://journals.muni.cz/gvms/article/view/4712

Klíčová slova

gypsum; crystal growth; induction time; hydrodynamic conditions; nucleation; rate

Plný Text:

Reference

Zobrazit literaturu Skrýt literaturu

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