Optimal plant design for integrated biorefinery producing bioethanol and protein from Saccharina japonica: A superstructure-based approach
메타 데이터
바이오화학분류
바이오플라스틱
플라스틱
바이오정밀화학
용매
화학제품
연료
화장품용 기능성소재
계면활성제⁄증점제
의료용 화학소재
식품첨가제
논문
Optimal plant design for integrated biorefinery producing bioethanol and protein from Saccharina japonica: A superstructure-based approach
학술지
Energy : technologies, resources, reserves, demands, impact, conservation, management, policy
저자명
Dickson, Rofice; Ryu, Jun-Hyung; Liu, J. Jay
초록
<P><B>Abstract</B></P> <P>A superstructure-based approach was proposed for optimization of biorefineries that use <I>Saccharina japonica</I> as feedstock. The goal of this study was to determine the optimal flowsheet design to maximize the net present value by considering the mass and energy balance, capital and manufacturing costs. Multiple design alternatives reported in the literature were considered at each biorefinery processing stage, which transformed the superstructure optimization into a mixed integer nonlinear programming (MINLP) problem. In order to efficiently compute a solution for the resulting MINLP problem, the separable programming technique is employed by approximating the initial MINLP problem into a mixed integer linear programming (MILP) problem. The results indicated that the minimum ethanol selling price for optimal design is $1.97/gal, whereas the net present value of $61.5 million is obtained based on the current wholesale prices for both products and raw materials. Sensitivity analysis was performed to identify potential for economic improvement. The developed framework has the capacity to efficiently scan through processing alternatives to identify an economically optimal design for different potential objective functions.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A superstructure-based optimization model is developed. </LI> <LI> Optimal flowsheet of macroalgae biorefinery are determined. </LI> <LI> Two different optimization scenarios are investigated. </LI> <LI> Sensitivity analysis elaborates potential improvements. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>