MODELING OF THE ADSORPTIVE WATER REMOVAL FROM DICHLOROMETHANE USING THE ASPEN ADSORPTION PROGRAM: DESORPTION STAGE
DOI:
https://doi.org/10.15421/jchemtech.v31i2.279050Keywords:
solvent technology, dehydration process, adsorption, desorption, dichloromethane, zeolites, process modeling of chemical technology, Aspen Adsorption, design of processes and apparatus for chemical productionAbstract
The purpose of this study is to investigate the water desorption stage in the technological process of dichloromethane dehydration and to provide recommendations on the choice of a desorption agent and optimal conditions for its use. The author performed computer modeling in the Aspen Adsorption program, which provided data for comparing the efficiency of using nitrogen and dichloromethane vapor as desorbing agents. The study showed that the use of dichloromethane vapor is characterized by significantly higher energy consumption than the use of nitrogen. This is primarily due to the large amount of energy required to vaporize dichloromethane before it is introduced into the column. In addition, the endothermic nature of the process causes the dichloromethane vapor to condense and form a liquid layer in the column, which increases the desorption time. Therefore, from a technological point of view, nitrogen is a more acceptable desorbing agent than dichloromethane, and desorption should be carried out at temperatures not lower than 80 °C.
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