Defining features in the kinetics of sodium carbonate-bicarbonate solution carbonization and the quality of the resulting sodium bicarbonate crystals

This paper reports a study into the influence of temperature and gas consumption on carbonization kinetics (saturation with carbon dioxide) sodium carbonate-bicarbonate solution. The also examined quality speed crystal formation in this process. research is predetermined by environmental problems faced modern enterprises that produce purified bicarbonate – an insufficient degree and, as result, excessive air pollution dioxide, which did not participate reaction during addresses these particular issues. As result using specialized laboratory equipment, it was found increase absorbent from 79 to 85 °C leads decrease maximum solution 64 59 %. In contrast, resulting crystals improves but only range 82 °C. With further temperature, stabilizes. It shown rate increases increasing specific (carbon characterized negative correlation value oversaturation terms NaНCO3. decreases velocity. Thus, reasonable assume established dependence Na2CO3 NaНCO3 velocity apparatus explained inhibition СО2 absorption, caused diffusion resistance crystallization. To improve productivity reducing supersaturation NaНCO3, recommended introduce seed zone binding columns.