Table 3.

Main operating parameters for the CaCO₃ crystallization experiments.

Parameter	Unit	Value
${\mathrm{CaCl}}_2$ concentrations	${\mathrm{g} \mathrm{L}}^{-1}$	0, 1.6
NaOH concentration at the feed	${\mathrm{mol} \mathrm{L}}^{-1}$	12.1 ± 0.1
${\mathrm{CO}}_{3_{\left(\mathrm{aq}\right)}}^{2-}$ concentration at the feed	${\mathrm{mol} \mathrm{L}}^{-1}$	0.15 ± 0.5
Feed addition rate	mL min−1	40
Impeller diameter	m	0.07
Stirring rate	rpm	100
Impeller tip speed	${\mathrm{m} \mathrm{s}}^{-1}$	0.37