S.K. Stefanis's research while affiliated with Imperial College London and other places
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Publications (9)
The sections in this article are
A systematic procedure to select solvents in mass separating agent (MSA) driven technologies so as to account for plant-wide point source or post-release environmental interactions is presented in this paper. A three step procedure is proposed involving identification of all agent-based operations within the process of interest, determination of a...
While increasing social concern and strict legislation have resulted in expanding the conventional design objectives of profitability to include environmental impact and operability aspects, traditional practices regarding environmental risk assessment (ERA) have mainly focused on providing qualitative guidelines to evaluate the likelihood and cons...
A systematic methodology for incorporating ecological considerations in the optimal design and scheduling of batch/semi-continuous processes is presented in this paper. The methodology embeds principles from Life Cycle Analysis (LCA) within a general multi-objective formulation for the design of multipurpose batch plants, with process economics and...
Solvent design, the selection of an optimal solvent in MSA driven technologies and reaction path synthesis, the selection of an optimal route in a network of alternative reactions for the manufacture of a desired product, constitute two key steps in arriving at environmentally sound designs. In this work, the Methodology for Environmental Impact Mi...
A Methodology for Environmental Impact Minimization (MEIM) is presented in this paper. The methodology, which embeds Life Cycle Analysis principles within a process optimization framework, involves proper definition of a consistent boundary around the process of interest, identification of the emissions inventory, quantification of environmental im...
Citations
... Since the feedstock collection and transportation to the AA production site is assumed to be similar for both pathways, only environmental impacts of the stand-alone AA production facilities will be assessed. Thus the assessment of impacts associated with environmental risk, waste minimization opportunities and raw materials [28][29][30] acquisition are beyond the scope of the present study and are not presented here. The comprehensive approach to the comparative study in the present work therefore emphasizes its novelty. ...
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... Such a problem can be avoided by the life cycle assessment, also known as life cycle analysis (LCA), which is a methodology considering the environmental impact of a product in every stage of its life cycle. The first paper using LCA as a tool for process design was published in 1995 by Stefanis et al. [50]. They presented a method for minimizing environmental impact (MEI), which took advantage of LCA to give a systematic quantification of the wastes generated. ...
... Calculated according to e.g. Stefanis et al., 1996 Areas of Intervention ...
... The first methods have been developed decades ago. Concerning the ERA methodologies, an example is the work presented by Stefanis and Pistikopoulos (1997) where a quantitative methodology has been developed linking process reliability considerations to environmental impact analysis within a process optimization framework. Recently, driven by the implementation of the Seveso III Directive, collected and analyzed experiences, knowledge, as well as new approaches for the prevention of major accidents with impacts on the environment. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/868642916925442-1584112018865_Q64/Efstratios-Pistikopoulos.jpg)
... Process evaluation allows identifying process hotpots, while optimization techniques improve sustainability performance indicators by energy, mass, and water-recycling systems considering priority targets. 20 These techniques may involve using mathematical programming to develop property integration, energy integration, and mass integration within heat-or mass exchange networks. 21 Although many studies have addressed process integration principles for resource conservation and pollution prevention, there are missing investigations focused on analyzing thermodynamic aspects regarding utility and freshwater usage minimization in the authors' best knowledge. ...
... Furthermore, the process design and operation could be simultaneously optimised through a non-linear programming method for minimising financial cost 60 . To prevent the human exposure and cost increase, the organic solvent loss should be mitigated by controlling operation conditions (e.g., pressure and temperature) and installing a vapour recovery system 61 . ...
... • The third approach uses a cleaning kinetics model to optimize costs and environmental impacts of production scheduling of batch plants. For example, Stefanis et al. (1997) appear to have used the model of Bird and Fryer (1991) to predict alkaline cleaning kinetics as a function of caustic soda concentration and initial fouling of the plant to optimize the eco-design of cheese production lines. This approach appears the most advanced, since it combines a model of cleaning kinetics with plant optimization. ...
