Abstract

The metastable zone width (MSZW) and induction time of CoSO4 in the presence of H2SO4 were measured at various operating conditions by polythermal and isothermal methods, respectively. Raman spectroscopy and UV–Vis have been successfully adopted for measuring the solubility of CoSO4. The nucleation parameters were estimated with a self-consistent Nývlt-like approach and classical 3D theory approach. The results show a decrease in the solubility of CoSO4 with an increase in the concentration of H2SO4. MSZW decreased when raising the saturation temperature, mixing speed, and H2SO4 concentration, and decreasing the cooling rate. The induction time measurement indicated that the system showed homogeneous nucleation at high supersaturation (>1.15) and heterogeneous nucleation at low supersaturation (<1.15). The crystallized product was CoSO4⋅7H2O which has an octahedron shape and cubic shape with and without H2SO4, respectively. Moreover, the particle sizes are smaller with increased H2SO4 concentration and cooling rate.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.