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

Object of research: optimization of the operation period of bicarbonate columns by optimizing their design features. Investigated problem: increasing the efficiency, environmental friendliness and duration of the bicarbonate columns by optimizing the design of the sludge discharge unit. Main scientific results: the article analyzes the main design features of bicarbonate columns for the production of purified sodium bicarbonate. A relationship has been established between the design of the apparatus, the intensity of mixing and the duration of the apparatus operation without stopping for washing. On the basis of the existing problems, laboratory and industrial experiments were carried out at one of the soda plants, aimed at increasing the efficiency of operation of the bicarbonate columns of the purified sodium bicarbonate shop. So, due to the modernization of the design of the sludge unloading unit and the identification of the optimal amount and month of the location of the mesh trays, an increase of 1.5-2 times in the duration of operation of the columns without stopping for washing was achieved. This contributed to an increase in plant productivity and environmental friendliness of the process due to a decrease in the amount of liquid waste generated during the washing of the column equipment. Area of practical use of the research results: enterprises for the production of purified sodium bicarbonate of food and pharmaceutical quality. Innovative technological product: design solutions for bicarbonate columns and the technology of carbonization of soda-bicarbonate solution for the production of purified sodium bicarbonate. Scope of application of the innovative technological product: soda production, food and pharmaceutical industries.

У роботі проведено аналіз впливу таких параметрів технологічного процесу, як температура, тиск, склад рідини, що піддається карбонізації, на ступінь поглинання вуглекислого газу. Виявлено найбільш оптимальні показники температури та тиску, що впливають на ступінь абсорбції СО 2 та на розмір кристалів бікарбонату натрію. Установлено необхідність подальших досліджень у галузі підвищення продуктивності та екологічної безпеки виробництва очищеного бікарбонату натрію. Ключові слова: вуглекислий газ, очищений бікарбонат натрію, содобікарбонатний розчин, карбонізація, абсорбція. Анализ влияния технологических параметров процесса карбонизации содобикарбонатного раствора в производстве очищенного бикарбоната натрия на степень абсорбции СО 2. Порохня Н.Ф. В работе проведен анализ влияния таких параметров технологического процесса, как температура, давление, состав карбонизуемой жидкости на степень поглощения углекислого газа. Выявлены наиболее оптимальные показатели температуры и давления, влияющие на степень абсорбции СО 2 , а также на размер кристаллов бикарбоната натрия. Установлена необходимость дальнейших исследований в области повышения производительности и экологической безопасности производства очищенного бикарбоната натрия. Ключевые слова: углекислый газ, очищенный бикарбонат натрия, содобикарбонатный раствор, карбонизация, абсорбция. Analysis of the influence of technological parameters of soda-bircarbonate solution carbonization in the production of refined sodium bicarbonate on CO 2 absorption. Porokhnia M. The paper analyzes the influence of such process parameters as temperature, pressure, composition of carbonized liquid on the carbon dioxide absorption. The most optimal indicators such as temperature and pressure and their influence on the CO 2 absorption and sodium bicarbonate crystals size have been identified. The need for further research in the field of improvement of column capacity and environmental safety of refined sodium bicarbonate production has been confirmed.