American Chemical Society
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Dynamics of an Absorption/Desorption Plant: Experimental Study and Model Validation

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posted on 2024-02-26, 18:06 authored by Mike Weber, Nicole Lutters, Eugeny Y. Kenig
Reactive absorption is a separation process widely used in the environmental protection area. In this process, undesirable gaseous components are captured by chemical reaction in a solvent while the loaded solvent is regenerated in a desorption unit. Both process steps, absorption and desorption, take place simultaneously and strongly interact resulting in a very complex process behavior. To ensure stable and safe process operation, even in the presence of instabilities or malfunctions, understanding of the dynamic process behavior is essential. In this work, a pilot plant experimental study was carried out in which three different stepwise changes of the solvent flow rate were made. The results of this study were used as a validation basis for the recently developed novel dynamic model of reactive absorption/desorption processes in a closed-loop configuration including the plant periphery. The deviations between experimental and simulated outlet gas concentrations were found to be below 10% for all experiments. The validated model was used to investigate the influence of the periphery on the process performance.

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