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<p> Various chemical engineering&#xa0;design frameworks and techniques have been developed since&#xa0;a few decades ago,&#xa0;covering from heuristic approaches, insight-based approaches, and mathematical optimization approaches. Based on the established frameworks, the main goal is to establish or synthesise a process based on given feedstock or targeted products. During the synthesis steps, selections of equipment and technologies are performed to fulfil the process requirement and form an integrated process which achieves positive economic performance as well as minimum environmental impact. Return of investment (ROI) and payback period are often used as the key performance indicators for measuring the success of the design. However, with the increasing awareness of sustainability and addressing the concerns of climate emergency and sustainable development, environmental and social impact assessments have also been taken into consideration as part of the main decision-making process. In most of&#xa0;the previous works, environmental and social assessments are based on tangible or numerical measurements, such as global warming potential and estimated job creation. The intangible and cascade impact of the sustainability measure has not been considered. To enhance the design framework, a novel value-based design framework is to be presented in this work. The value-based design framework offers a new set of measures to redefine a more prosperous and sustainable chemical process design which considers tangible and intangible impact within the selection process. New concepts of return of value (ROV) and value-based life cycle assessment (V-LCA) are introduced to measure the value of the synthesised sustainable chemical process. Based on the newly proposed concept, different aspects (environmental, social, etc.) can be taken into consideration simultaneously without the requirement of multi-objective optimization. In addition, the proposed concept can promote and enhance recovery of materials and minimise waste generation. Such a concept is aligned with Sustainable Development Goal 12: Sustainable Consumption and Production.</p>

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Value-Based Sustainable Chemical Engineering Design Framework

  • 期刊论文

  • 发表日期：

    2025年8月4日

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  • Denny K. S. Ng

摘要

Various chemical engineering design frameworks and techniques have been developed since a few decades ago, covering from heuristic approaches, insight-based approaches, and mathematical optimization approaches. Based on the established frameworks, the main goal is to establish or synthesise a process based on given feedstock or targeted products. During the synthesis steps, selections of equipment and technologies are performed to fulfil the process requirement and form an integrated process which achieves positive economic performance as well as minimum environmental impact. Return of investment (ROI) and payback period are often used as the key performance indicators for measuring the success of the design. However, with the increasing awareness of sustainability and addressing the concerns of climate emergency and sustainable development, environmental and social impact assessments have also been taken into consideration as part of the main decision-making process. In most of the previous works, environmental and social assessments are based on tangible or numerical measurements, such as global warming potential and estimated job creation. The intangible and cascade impact of the sustainability measure has not been considered. To enhance the design framework, a novel value-based design framework is to be presented in this work. The value-based design framework offers a new set of measures to redefine a more prosperous and sustainable chemical process design which considers tangible and intangible impact within the selection process. New concepts of return of value (ROV) and value-based life cycle assessment (V-LCA) are introduced to measure the value of the synthesised sustainable chemical process. Based on the newly proposed concept, different aspects (environmental, social, etc.) can be taken into consideration simultaneously without the requirement of multi-objective optimization. In addition, the proposed concept can promote and enhance recovery of materials and minimise waste generation. Such a concept is aligned with Sustainable Development Goal 12: Sustainable Consumption and Production.