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Publications (123)
The development of eco-industrial parks is now proven a local efficient solution to reduce environmental impacts of industrial areas as well as increasing economic benefits. Furthermore, they are a good way to produce goods while reducing environmental footprints by exchanging energies, water and raw materials instead of consuming too much resource...
Global energy security relies on fossil-based resources that are affiliated with the source of global warming, apart from punches of political and economic instabilities. Biomass is a promising alternative carbonaceous feedstock used for the production of clean energy that could have the potential to substitute for fossil fuels. This study aims to...
Climate change and rapid population growth have caused a steady rise in the global demand of water, energy and food. Various review articles have studied this effect through the water-energy-food nexus (WEFN) topic from different aspects, including flow quantification and policy making, among others. Optimization models have also been formulated re...
In recent years, supply chain optimization has become a major topic in operational research. Huge efforts were made to outline effective methodologies both from computational and final solution quality perspective. However, besides being optimal, one major need of supply chains is flexibility and adaptability to disturbances. This research work aim...
During the last decades, energy and process integration have become the most spread practices to optimize chemical processes both from economic and environmental perspectives. While the design of the integrated and conventional configurations are usually compared by referring to nominal operating conditions, assessing the implications of process in...
This contribution provides an optimization-based decision support model of biomass to biofuels supply chain (BBSC) in order to offer optimal strategic decisions and tactical plans in the entire supply chain. This model is designed for long-term planning studies, in that it is utilized to optimize the Ethiopian BBSC over a 20-year horizon. Moreover,...
With the increasing amount of data to quickly process, surrogate modeling has become a topic of major interest in process engineering during the last decades. Recently, black-box models have gained renewed interest as effective tools to reduce the computational effort and to enhance the solution of optimization algorithms. Among the surrogate model...
When chemical processes involve the treatment of raw materials characterized by unstable properties over the year’ s seasons, upstream perturbations could affect the downstream operation feasibility. This research work discusses how non-idealities can be exploited to enhance the flexibility of the operation for an ABE/W purification section. In par...
Several optimization models, which consider economic and environmental perspectives, have been developed recently to support the sustainable biomass-to-biofuel supply chain (BBSC) design. All of the economic-environmental optimization models rely on solving long-term planning problems with a conventional hierarchical approach, where tactical decisi...
The Process System Engineering community has an extensive knowledge and skills on supply chain design: from the time dimension (production and flow planning) to the space dimension (geographic position of facilities). Nevertheless, supply chains are also social networks where multiple stakeholders have to collaborate while they have different, and...
Despite biofuels’ significance in substituting petroleum products in the transportation sector, many countries, including Ethiopia, have not taken advantage of their biomass resources potential to develop biofuel. This is attributed to several challenges, in which the economic unattractiveness, especially the requirement of excessively high initial...
Process integration has become the best practice over the last years in separation units design. In particular, distillation trains can be reduced in a single column shell by means of internal separating wall under the name of Dividing Wall Column. This configuration allows on average for a 30% total costs reduction and is more and more popular for...
Energy is one of the essential inputs for socio-economic, and geo-political strategies in nation building. Among potential interests, lignocellulosic biomasses constitute a prime source of biofuel and other value-added products. The thermochemical approach resolve to the degradation of cellulosic biomass into fragments of lignin, hemicellulose and...
During the last decades, design under uncertainty has become one of the key aspects in the Process Systems Engineering with widely spread applications to technological and economic aspects. In particular, the supply chain design is seeing a constantly increasing interest and flexibility could be an added value of critical importance for the supply...
Industrial systems are complex in terms of types of material exchanged (water, electricity, vapour…), types of industries involved, and size of companies, temporality and many others. Regarding this complexity, this paper aims at developing a generic methodology able to design exchanges between companies in an eco-industrial park in terms of electr...
The new sustainability goals aimed at mitigating the environmental impacts of energy and chemical industry result in more considerable implications on process design than the mere substitution of the raw material to be processed.
The entire design procedure was based so far on the needs of fossil fuels and petrochemical raw materials and was orient...
Flexible operations design is one of the key challenges of process engineering over the last years. However, even when uncertainty during the design phase is taken into account, the vast majority of research works refer to steady state conditions only, neglecting the system behaviour during the transition from the nominal state to the perturbed one...
The very first step of almost any separation process design is the thermodynamic feasibility analysis. In case of distillation, Residue Curve Maps (RCMs) represent an essential tool to assess whether the separation is feasible or not. However, the analysis is generally carried out by referring to nominal operating conditions and to product purities...
Climate Change and its effects in water scarcity has become an important challenge for cities with water management problems. These problems require an integral planning of the city, which can be supported by optimization. The main goal of the research is to provide a regional optimization model for water networks, including new treatment options....
Motivated by the design and optimization of the water exchange networks in Eco-Industrial Parks (EIP), we investigate the abstract Blind-Input model for general exchange networks. This abstract model is based on a Game Theory approach, formulating it as a Single-Leader-Multi-Follower (SLMF) game: at the upper level, there is an authority (leader) t...
Multicomponent mixtures can be separated into their single components by mean of different distillation system configurations. The typical distillation train design procedure consists of the assessment of the optimal columns configuration according to the economic and operational aspects. However, this optimal design is strictly related to the oper...
By gathering in Eco-Industrial Parks (EIPs), companies obtain benefits from synergistic cooperation but it also creates a risk by increasing interdependencies. The aim of this paper is to provide a method for optimally design exchanges that takes into consideration real stakes of companies. This resolution method is assessed on a multi-period MILP...
Mutations in the energy sector are shifting the production and distribution systems from a centralized to a decentralized model. Within this context, we address the economics of grid-connected Hybrid Renewable Energy Systems (HRES) in relation with energy management strategies by considering taxes and economic regulation frameworks. Therefore, we p...
Production of bio-succinic acid through microbial fermentation using agro-industrial waste has been observed extensively. Large scale production is now being considered since bio-succinic acid has broad range application in several industries including agricultural, food, chemical, metal, and pharmaceutical industry as a precursor, ion chelator, an...
The bioproduct from biomass appears to be major interests for future years given the spectacular and fast advances in microbiology. But the industrial developments of the new bioproducts production struggle to follow this constant and massive creation. Therefore, to estimate the potential of new bioproducts is necessary to pre-design biorefineries...
Nowadays, industries are facing significant environmental and competitive stakes. An efficient way for companies to overcome these difficulties is to gather and collaborate in Eco-Industrial Parks (EIP). Nevertheless, establish an optimal eco-industrial exchange is a task that requires the development of methods. This article therefore proposes a m...
Biofuel derived from biomass on account of being renewable energy source and having high potential to substitute fossil fuels, have attracted considerable interest in both developed and developing countries like Ethiopia. However, the lack of optimal design and planning of the biomass-to-biofuel projects in countries like Ethiopia results in poor e...
Residue curve maps (RCMs) are a widely exploited tool to assess whether a multicomponent mixture separation by distillation results to be feasible or not. They usually refer to a given feed composition and to the products purities as specifications; sometimes the whole distillation regions can be discussed in order to evaluate all the mixture possi...
This paper presents the authors’ perspectives on some of the open questions and opportunities in Process Systems Engineering (PSE) focusing on process synthesis. A general overview of process synthesis is given, and the difference between Conceptual Design (CD) and Process Design (PD) is presented using an original ternary diagram. Then, a bibliome...
Flexibility analysis is a step of process design procedure that is often skipped; sometimes a sensitivity analysis is performed with features similar to the flexibility one but in general they don't overlap. The latter indeed usually has the purpose of assessing the operability range of an already designed system, while the former can be introduced...
The energy sector is mutating with an increasing share of renewable energy. Renewable energy developers are facing new challenges, in particular sizing systems that combine multiple production sources and storage devices to match demand. Accordingly, this paper proposes a flexible metamodel architecture and a C++ software implementation for the gra...
An Eco-Industrial Park (EIP) is a community of businesses that seeks to reduce the global impact by sharing material. The connections among the industrial participants within this park improve the environmental performance of the industrial network. However, the connectivity also propagates failures. This risk is an important point of criticism and...
A multi-leader-follower game (MLFG) model for the design of the utility network in an eco-industrial park (EIP) is studied and implemented by introducing the concept of an environmental authority. The methodology also considers the flowsheet simulation of each enterprise involved in the EIP in order to obtain utility consumption of each enterprise...
Nowadays, many Eco-Industrial Parks (EIP) are emerging all around the world. In these eco-industrial parks, industries gather to share several streams like energies, water, resources, and wastes in order to realise economic benefits while lowering their environmental impact. However, most of the time, these EIP are historically constituted and ther...
Water, as everybody knows, is a limited and fragile resource. In fact, water faces several challenges in the future due to the increase of population, pollution, climate change, etc. To overcome these problems, some concepts linked to sustainable development such as “Industrial Ecology” have emerged. The concept of industrial ecology is defined as...
Currently, the implementation of a new production system needs to satisfy three dimensions of sustainability, i.e., it must be economically viable, socially beneficial and have a low environmental impact. Unfortunately, for the social aspect, there is a lack of theoretical underpinnings, in contrast to the environmental dimension, for which the the...
Project developer in the domain of land settlement project are involved with many stakeholders and are usually overflown by data relative to technical, economic and social issues. This paper contributes to the necessary multi-scale approach challenge and we propose a holistic framework that enables to describe the development process of land settle...
Industrial symbiosis offers to companies the possibility to make economic benefits and to minimize environmental impacts by sharing flows and increasing inter-enterprise exchanges. However, even if some studies have demonstrated the benefits of the development of eco-industrial parks (EIP), there is no consensus to evaluate their benefits in a glob...
The biorefining is a fast-growing topic and laboratory data about biorefineries accumulate sharply, but this type of process is still mainly unknown at the industrial scale. In this context, it is necessary to propose a method that permits to evaluate the industrial interest in order to design and to build the biorefinery. Moreover, the optimizatio...
The design and operation of sustainable biorefineries is an important subject of research since the current environmental context makes urgent the development of robust methodologies able to design innovative industries. In this context, flexibility of distillation sequences plays a very important role. The design is based on nominal production dat...
Any sustainable land settlement project should consider social and environmental issues along with usual technico-economic issues. That complexity prompts us to propose a metamodel framework (Roth et al., 2017), and support it with a generic core metaontology shown in this work. It is further instantiated into four issues, stakeholders, layers and...
An Eco-Industrial Park (EIP) is a community of businesses that seeks to reduce the global impact through material sharing. Even though an EIP presents an environmental improvement when compared with a set of stand-alone industrial plants, the established connections among the industrial participants can propagate failures, and become in a source of...
The design and optimization of industrial water networks in eco-industrial parks is studied by formulating and solving multi-leader-follower (MLFG) game models. The methodology is explained by demonstrating its advantages against multi-objective optimization (MOO) approaches. The approach is validated on a case study of water integration in EIP wit...
Products derived from biomass have high potential to replace the classical chemical products and to develop the revalorization of the green wastes. To elaborate this kind of product, it is necessary to create processes and industrial pathways, and then determine the optimal biorefinery. The study presents a multiscale methodology consisting in a de...
The bio-based n-butanol has major potential to replace fossil-based products due to, on the first hand, the decline of crude oil and, on the other hand, since the butanol has high potential as fuel. To set its production in industrial scale the development of tools designing the process is needed. In our work, we focus on second generation biorefin...
In Case Based Reasoning the representation of a case and the similarity measures are two difficult steps in the conception of a system. Often, these steps are developed to resolve one kind of problem. However, in some of them such as recovery treatment processes generation, it is necessary for the system to be able to modify and adapt the represent...
In this paper, a solution strategy based on an optimization formulation is proposed for the design of water allocation and heat exchange networks (WAHEN) in the process industries. Such typical large problems involve many processes, regeneration units and multi-contaminants. For this purpose, a two-stage methodology is proposed. The first step is t...
The design and optimization of industrial water networks in eco-industrial parks is studied by formulating and solving multi-leader-follower game problems. The methodology is explained by demonstrating its advantages against multi-objective optimization approaches. Several formulations and solution methods for MLFG are discussed in detail. The appr...
The core of this study is the design of Water Allocation Networks (WAN) defined by a superstructure integrating different processes, regeneration units and contaminants. In this work, different optimization frameworks are compared to identify the main elements and criteria to be considered as well as the more robust methodology to solve problems in...
The current environmental context makes urgent the development of robust methodologies able to design innovative industries. Industrial ecology, and most particularly the concept of eco-industrial parks, aims at proposing at several companies to gather in a same geographical site to share several fluxes (water, energy, utilities...) in order to dec...
The objective of this contribution is to present a mathematical model (Mixed Integer Linear Programming) for the facilities and biorefinery locations, and the logistic management. For the model formulation, we first need a geographical discretization of the region in which the supply chain would be implemented and the identification of the differen...
This contribution addresses the optimal design of the biomass supply chain as it is crucial to ensure long term viability of such a project. This work is focused on the multi objective optimization by considering all the dimension of the sustainable development, namely economic, environmental, and social. The environmental dimension is quantified t...
This study focuses on the development of a methodological framework for the design of a five-echelon hydrogen supply chain (HSC) (energy source, production, storage, transportation and fuelling station) considering the geographic level of implementation. The formulation based on mixed integer linear programming involves a multi-criteria approach wh...
A mathematical programming approach is developed to optimize the hydrogen supply chain in Midi-Pyrénées, the largest region of France. The aim of this study is to use a Geographical Information System (GIS) as a new tool for multi-criteria decision making after multiobjective optimization step. To have a more precise snapshot of the results obtaine...
The Green Integrated Forest Biorefinery (GIFBR), a new concept suitable for implementation in pulp and paper mills is characterized by low greenhouse gases emissions, reduced water consumption and production of effluents. Its fossil fuel consumption must be nil. Several challenges have to be addressed to develop a sustainable GIFBR facility. An imp...
The multiobjective optimization (MOO) of industrial water networks through goal programming is studied using a mixed-integer linear programming (MILP) formulation. First, the efficiency of goal programming for solving MOO problems is demonstrated with an introductive mathematical example and then with industrial water and energy networks design pro...
With the growing environmental concern, there is evidence that increasing symbiotic relationship between plants in the same industrial area, highly contributes to a more sustainable development of industrial activities. The concept of industrial ecology extended to the terms of eco-industrial park (or ecopark) or industrial symbioses is the topic o...
Several roadmaps and international projects are interested in the development of the hydrogen economy for the transportation system. Yet, the development of a hydrogen economy suffers from a lack of infrastructure to store and supply H2 fuel to the refuelling stations, while at the same time, hydrogen can be just seen as one alternative among other...
The objective of this work is to propose an integrated and generic framework for eco- design that generalizes, automates and optimizes the evaluation of the environmental criteria at earlier design stage. The approach consists of three main stages. The first two steps correspond to process inventory analysis based on mass and energy balances and im...
This work considers the potential future use of hydrogen in fuel cell electrical vehicles to face problems such as global warming, air pollution, energy security and competitiveness. The lack of current infrastructure has been identified as one of the main barriers to develop the hydrogen economy. This work is focused on the design of a hydrogen su...
