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François Maréchal

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Related publications (437)

Combined mass and energy integration in process design at the example of membrane-based gas separation systems

This paper presents an approach for combined mass and energy integration in process synthesis and illustrates it at the production of crude synthetic natural gas (SNG) from lignocellulosic biomass and its separation in a membrane cascade. Based on a genera ...

Elsevier2010

Systems interactions analysis for the energy efficiency improvement of a Kraft process

François Maréchal

There is a broad range of techniques available to the engineer and that should be considered in a retrofit project to enhance the energy efficiency of an operating process. The two best known techniques and most often utilized are internal heat recovery by ...

2010

A process and a plant for hydrothermal SNG production from waste biomass

Martin Gassner, François Maréchal, Frédéric Vogel

It is the aim of the present invention to provide a system and a process for hydrothermal SNG production from waste biomass having a design of the product separation that not only considers the grid quality specifications for SNG, but also the recovery of ...

2010

Integrated Thermo-Economic Modelling of Geothermal Resources for Optimal Exploitation Scheme Identification

François Maréchal, Léda Gerber

This paper details the development of a systematic methodology using thermo-economic modeling that can be used to identify the optimal exploitation schemes of geothermal resources. A multi-period approach is used, integrating the superstructure of exploita ...

2010

Increasing Conversion Efficiency in Fuel Ethanol Production from Lignocellulosic Biomass by Polygeneration - and a Paradoxon between Energy and Exergy in Process Integration

Martin Gassner, François Maréchal

In the public and scientific debate on biofuels, ethanol from lignocellulosic biomass is generally the most popular alternative that may allow for a sustainable production. Compared to thermochemical processing of biomass which assures a complete conversio ...

2010

Thermochemical production of liquid fuels from biomass: Thermo-economic modeling, process design and process integration analysis

Martin Gassner, François Maréchal, Laurence Tock

A detailed thermo-economic model combining thermodynamics with economic analysis and considering different technological alternatives for the thermochemical production of liquid fuels from lignocellulosic biomass is presented. Energetic and economic models ...

Elsevier2010

Environomic optimization of SNG production from lignocellulosic biomass using Life Cycle Assessment

Martin Gassner, François Maréchal, Léda Gerber

This paper discusses strategies for the environomic optimization of renewable energy conversion technologies that are at the conceptual process design stage and produce multiple energy services, using Life Cycle Assessment (LCA). It is illustrated by an ap ...

2010

Thermo-economic Evaluation of the Thermochemical Production of Liquid Fuels from Biomass

Martin Gassner, François Maréchal, Laurence Tock

Different technological alternatives for the thermochemical production of liquid fuels from lignocellulosic biomass are systematically analyzed and optimized based on thermo-environomic models. The competitiveness of the production of Fischer-Tropsch fuel ...

2010

New generic approach for the analysis of energy conversion system models

Raffaele Bolliger, François Maréchal, Helen Carla Becker

This paper proposes a new approach in the field of energy conversion systems analysis and synthesis. The method is based on a generic and multi-platform description syntax, that clearly separates the information concerning the physical behavior of the mode ...

Elsevier2009

Analysis of a biorefinery integration: application to a sulfite wood pulping process

François Maréchal, Zoé Périn-Levasseur

The pulp and paper (P&P) industry in industrially mature countries is facing a long-term crisis. Large and modern manufacturing facilities in tropical regions emerge as new competitors. The constant increase of energy costs has also contributed to the fina ...

2009

Analysis of a biorefinery integration in a bisulfite pulp process

François Maréchal, Zoé Périn-Levasseur

Process integration techniques have been applied to study a bisulfite mill which produces pulp and three additional by- products: bioethanol, lignosulfonate and yeast. Particular attention was devoted to the integration of the chemical recycling loops whic ...

2009

Integration of LCA in a thermo-economic model for multi-objective process optimization of SNG production from woody biomass

Martin Gassner, François Maréchal, Léda Gerber

This paper presents a methodology to integrate life cycle assessment (LCA) in models used to design energy conversion systems. It is illustrated by an application to a thermo-economic model for the multi-objective optimization of synthetic natural gas (SNG ...

2009

Process modeling and integration of fuel ethanol production from lignocellulosic biomass based on double acid hydrolysis

Daniel Favrat, Martin Gassner, François Maréchal, Zoé Périn-Levasseur, Suping Zhang

Lignocellulosic biomass is considered as one of the most promising feedstocks for producing fuel ethanol because of its global availability and environmental benefits of its use. In this paper, the process of lignocellulosic ethanol production was investig ...

2009

SYNTHESIS AND PARAMETER OPTIMIZATION OF A COMBINED SUGAR AND ETHANOL PRODUCTION PROCESS INTEGRATED WITH A CHP SYSTEM Part 2: Maximization of total site net power

François Maréchal, Adriano Viana Ensinas

The combined sugar and ethanol production process from sugar cane is a paradigmatic application for energy integration strategies because of the high number of hot and cold streams involved, the external hot utility requirement at two temperature levels fo ...

2009

Efficient energy conversion in a sulfite pulping process

François Maréchal, Zoé Périn-Levasseur

Reducing energy consumption in the pulp and paper industry can lead to considerable cost savings. The three main points to consider when implementing an energy efficiency program in a mill are the reduction of the energy requirement, the energy recovery an ...

2009

Synthesis and parameter optimization of a combined sugar and ethanol production process integrated with a CHP system Part 1: Minimization of the process external heat requirement

François Maréchal, Adriano Viana Ensinas

2009

Methodology for the optimal thermo-economic, multi-objective design of thermochemical fuel production from biomass

Martin Gassner, François Maréchal

This paper addresses a methodology for the optimal conceptual design of thermochemical fuel production processes from biomass. A decomposed modelling approach with separate energy-flow, energy-integration and economic models are coupled with a multi-object ...

Elsevier2009

Optimal energy system design under uncertain parameters

François Maréchal, Matthias Dubuis

he aim of this paper is to discuss the integration of uncertainity analysis in an thermo-economic optimization method for process system design. Most of time energy systems are designed under constant parameters, whereas some of them are uncertain in real ...

Juri Klemes2009

Simulation of Fuel Ethanol Production from Lignocellulosic Biomass

Daniel Favrat, Martin Gassner, François Maréchal, Suping Zhang

Models for hydrolysis, fermentation and concentration process, production and utilization of biogas as well as lignin gasification are developed to calculate the heat demand of ethanol production process and the amounts of heat and power generated from res ...

2009

Process integration and opportunity for heat pumps in industrial processes

François Maréchal, Helen Carla Becker

Process integration methods allow one optimizing industrial processes. The main goals are decreasing energy demand and operating costs as well as reduction of pollutants emissions. High fuel costs promote installation of heat pumps. In a heat pump process ...

2009

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