Synthesis of Mass Exchanger Networks Using Sequential Techniques

Mass exchange units are important in many industrial processes. Therefore, there is a need to design and operate these units in a coordinated and integrated manner. This chapter presents a systematic approach for the synthesis of mass exchanger networks involving utility targeting. A sequential technique for targeting external mass separating agent and developing an optimal network design is discussed. The proposed technique was applied to a CO2 adsorption process involving two mass separating agents (MSAs) that do not overlap. A thermodynamic analysis of the CO2 adsorption process was outlined using the composition interval method. Feasible structures were formulated, and the synthesis task was expressed in a two-stage targeting procedure as an optimization task. This chapter also discussed a trade-off between the process and external MSA in the case study considered to determine the minimum amount of external MSA required for a typical CO2 capture process. The results obtained indicated that mass integration via process synthesis is an effective strategy to minimize the quantity of external utilities in industrial processes.

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