(80c) Systematic Design and Intensification of Shale Gas Utilization Processes
In this work, building block-based design and intensification approach is used for the synthesis and intensification of shale gas utilization systems. Building block-based superstructure provides an optimization-based methodology toward incorporating process intensification in the conceptual design stage . It is formed by collecting building blocks in a two-dimensional grid and can be used to automatically generate many different flowsheet variants . In this representation, several physical and chemical phenomena, e.g. reaction, vapor-liquid equilibrium, gas-liquid equilibrium, etc., can be represented either as a âsingle blockâ or via multiple neighboring blocks. For example, membrane modules are represented as a collection of two blocks separated by a membrane boundary. Similarly, vapor-liquid contact is represented as two neighboring blocks sharing a common boundary for phase contact. We formulate this block superstructure as a mixed integer nonlinear programming optimization (MINLP) problem. This MINLP model is then solved with cost and sustainability objectives to obtain several intensified flowsheet variants. We will present several intensified flowsheet alternatives that yield less total annual cost compared to the base-case design reported in the literature .
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