Synthesis of chemical processes using process graph = 공정그래프를 이용한 화학공정의 합성

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This thesis addresses the development of efficient methods for synthesis of chemical processes. Synthesis of the chemical process means determining both the structure of the process and its design parameters. The proposed methods apply the Process graph(P-graph) theory to represent the chemical process synthesis problems and to generate the set of feasible process structures. Generally, process synthesis problems can be represented by MINLP (Mixed Integer Nonlinear Programming) models with suitable superstructure. However there had been no mathematical definition and theory about superstructure until P-graph theory was introduced. Also it is difficult to solve the MINLP models in which many combinatorial properties are involved. This problem can be overcome using P-graph theory in which combinatorial properties can be easily incorporated. In addition, if the structural constraints of synthesis problems are used to determine the set of feasible process structures, then the size of search space can be extremely reduced in the synthesis problem. The main contribution of this work is the minimization of search space of binary variables in chemical process synthesis problems. The original P-graph theory was developed for general flowsheet synthesis problems, but it can be applied to the specific problems with proper definitions of material and operating unit sets. In this work, methods for synthesis of two chemical process networks are developed. They are mass exchange network (MEN) and scheduling list synthesis. For each synthesis problem, the process synthesis problem is converted to a P-graph synthesis problem. To demonstrate the proposed methods, industrial synthesis problems are examined.
Park, Sun-Wonresearcher박선원researcher
한국과학기술원 : 화학공학과,
Issue Date
133631/325007 / 000935266

학위논문(박사) - 한국과학기술원 : 화학공학과, 1998.2, [ xiii, 99, [22] p. ]


Sequence branch algorithm; P-graph; Prcess graph; Process synthesis; SBA; 스케줄링; 순차 가지 알고리즘; P-그래프; 공정그래프; 공정합성

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