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Adrien Gomez

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Papers by Adrien Gomez

Methodology for Minimising the Utility Consumption of a 2g Ethanol Process

Chemical engineering transactions, 2014

The production of ethanol from lignocellulosic biomass has gained increased interest in recent ye... more The production of ethanol from lignocellulosic biomass has gained increased interest in recent years, notably in the context of valorising agricultural by-products and providing fuels from renewable sources In order to increase their competitiveness, the energy demand of such processes needs to be minimised. This issue procures two benefits : (1) reduce utility consumption and (2) increase cogeneration possibility. In the present article we investigate this problem for a study process: ethanol production from sugarcane bagasse by enzymatic hydrolysis and glucose fermentation. We therefore apply a rigorous optimisation methodology in which we control certain design parameters in order to maximize the net production of utility. As a result, we obtain a design for our process which (1) eliminates the need for an external hot utility, (2) minimizes the need for the cold utility and (3) maximises the cogeneration possibility.As a conclusion, the proposed methodology provides a strong too...

$Research paper thumbnail of Method for capturing e.g. carbon dioxide compounds contained in natural gas to limit global warming phenomenon, involves making gas fractions to be in contact with absorbing solution fractions in absorbing sections arranged in same column$

Method for capturing e.g. carbon dioxide compounds contained in natural gas to limit global warming phenomenon, involves making gas fractions to be in contact with absorbing solution fractions in absorbing sections arranged in same column

Method and CO2 capture plant by forming gas hydrates

Process for CO2 capture by absorption with use of low steam temperature and a flash for regeneration

Process for the production of electricity by recovery of waste heat fluids from a refinery

Process for the production of electricity by recovering waste heat of gaseous fluids from a distillation column

Method for producing electricity, involves slackening obtained vaporized coolant in turbine driven by generator to produce electricity, and reinjecting part of condensed fluid into column

Review of design works for the conversion of sugarcane to first and second-generation ethanol and electricity

Renewable and Sustainable Energy Reviews, 2018

The conversion of sugarcane, the world's largest crop, to energy vectors, namely first and second... more The conversion of sugarcane, the world's largest crop, to energy vectors, namely first and second-generation ethanol and electricity, is an ongoing scientific endeavor. This conversion makes use of complex processes with numerous unit operations and process blocks addressed in literature. Such processes have also been the subject of detailed thermo-economic and techno-economic evaluations as well as the application of systematic methodologies involving simulation, heat integration, optimization and selection. Key works related to this field are discussed in this review along with their hypotheses and results. The main future technologies are also presented. This review is realized to provide the scientific community with accessible references, information and ideas that will ultimately help researchers build consolidated and optimal designs for this process.

Methodology for the design and comparison of optimal production configurations of first and first and second generation ethanol with power

Applied Energy, 2016

h i g h l i g h t s 1st generation (1G) ethanol and power vs. 1G and 2G ethanol and power process... more h i g h l i g h t s 1st generation (1G) ethanol and power vs. 1G and 2G ethanol and power processes. Application of simulation-optimiza tion-selection method for optimal process design. Optimization results have efficiencies, costs and utilities better than literature. 2G ethanol competitive only for 2G ethanol prices 2-4 times higher than normal. Similar design for two processes saves evaporation, utilities, hydrolysis and drying.

Methodology for the optimal design of an integrated sugarcane distillery and cogeneration process for ethanol and power production

Energy, 2016

The application of systematic methodologies for the optimal design of integrated processes has se... more The application of systematic methodologies for the optimal design of integrated processes has seen increased interest in literature, namely for bioprocesses. The development and application of such a methodology to ethanol and power production from sugarcane and leaves, in a combined distillery and cogeneration plant is investigated in this article. The methodology breaks down as follows: process simulation, heat integration and thermo-economic evaluation, bi-objective multi-variable evolutionary optimization, and process selection. The objective functions are exergy efficiency and capital cost, whereas the selection criterion is the maximization of the Net Present Value (NPV). This choice was motivated by the variation in process related market parameters and their impact on profitability. Optimization generated 31 optimal trade-off solutions with better results than literature. Exergy efficiency ranged between 37.6% and 41.7% and capital costs between 155 M$ and 210 M$. Process selection led to a single configuration maximizing NPV for four economic scenarios. The configuration's exergy efficiency and capital costs were equal to 40.63% and 163 M$. This point presented an optimal compromise between heat integration and capital costs. This article provides a breakthrough in the application of this methodology, to the investigated process specifically.

Optimisation technico-économique multiobjectif de systèmes de conversion d'énergie : cogénération électricité-hydrogène à partir d'un réacteur nucléaire de IVème génération

Http Www Theses Fr, 2008

Titre : Optimisation technico-économique multi-objectif de systèmes de conversion d'énergie: cogé... more

Methodology for the optimal design of an integrated first and second generation ethanol production plant combined with power cogeneration

Bioresource technology, Jan 30, 2016

The application of methodologies for the optimal design of integrated processes has seen increase... more The application of methodologies for the optimal design of integrated processes has seen increased interest in literature. This article builds on previous works and applies a systematic methodology to an integrated first and second generation ethanol production plant with power cogeneration. The methodology breaks into process simulation, heat integration, thermo-economic evaluation, exergy efficiency vs. capital costs, multi-variable, evolutionary optimization, and process selection via profitability maximization. Optimization generated Pareto solutions with exergy efficiency ranging between 39.2% and 44.4% and capital costs from 210M$ to 390M$. The Net Present Value was positive for only two scenarios and for low efficiency, low hydrolysis points. The minimum cellulosic ethanol selling price was sought to obtain a maximum NPV of zero for high efficiency, high hydrolysis alternatives. The obtained optimal configuration presented maximum exergy efficiency, hydrolyzed bagasse fractio...

Teaching Mono and Multi-objective Genetic Algorithms in Process Systems Engineering: an illustration with the MULTIGEN environment

OATAO is an open access repository that collects the work of Toulouse researchers and makes it fr... more

Optimization of electricity / hydrogen cogeneration from generation IV nuclear energy systems

Computer Aided Chemical Engineering, 2007

One of the great motivations of studying and developing Generation IV (Gen IV) reactors of VHTR (... more One of the great motivations of studying and developing Generation IV (Gen IV) reactors of VHTR (Very High Temperature Reactor) design concept is their capacity to efficiently produce both electricity and H 2 (hydrogen). This study aims at developing an optimization methodology for cogeneration systems of H 2 and electricity, from Gen IV nuclear reactors, with respect to energy constraints, economics and conjuncture in term of demand. It lies within a scope of a collaboration between the Laboratoire de Génie Chimique (Toulouse, France) and the Commissariat à l'Energie Atomique (CEA, Cadarache, France) in order to compare various cogeneration systems from both energy and economics viewpoint. This paper presents the results of an optimization study based on the "minimal destruction of exergy" or "exergy loss" concept. This criterion, used within the framework of a mono-objective genetic algorithm optimizer, was applied successfully to electric and heat production from Gen IV systems.

New IFP optimized first generation process for post-combustion carbon capture : HiCapt plus (TM)

10th International Conference on Greenhouse Gas Control Technologies, 2011

ACACIA Project – Development of a Post-Combustion CO2Capture Process. Case of the DMXTMProcess

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2014

Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°6,... more

The DMX™ process: An original solution for lowering the cost of post-combustion carbon capture

Energy Procedia, 2011

To make the deployment of carbon capture possible, it is highly needed to develop original soluti... more To make the deployment of carbon capture possible, it is highly needed to develop original solutions that induce low energy penalty and that are easy to operate. This paper aims at presenting the DMX™ process developed at IFP Energies nouvelles based on special solvents which are characterized by the formation of two immiscible phases for given temperature and CO 2 loading conditions. The concept of demixtion is briefly described in terms of physico-chemical properties, its interest and all required steps for appropriate process development are discussed. The corresponding process is presented and a technicoeconomic analysis is given. It is shown than one can reach a reboiler duty as low as 2.1 GJ/t CO 2 which is significantly lower than the 3.7 GJ/t CO 2 of the 30wt.% MEA reference process. It is also discussed that the energy consumption at reboiler cannot be the only parameter to consider for comparison with other processes and some further information about the DMX™ process are given. Operational issues are particularly discussed. In that sense, the performances of the DMX-1™ solvent in terms of degradation and corrosion are shown. Similarly a particular focus is made on the liquid/liquid separation which is a key aspect of the DMX™ process.

Hollow Fiber Membrane Contactors for Post-Combustion CO2Capture: A Scale-Up Study from Laboratory to Pilot Plant

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2013

Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°6,... more

A Technical and Economical Evaluation of CO2Capture from Fluidized Catalytic Cracking (FCC) Flue Gas

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2014

Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°6,... more

Hollow Fiber Membrane Contactors for CO2Capture: Modeling and Up-Scaling to CO2Capture for an 800 MWeCoal Power Station

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2013

Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°6,... more

Methodology for Minimising the Utility Consumption of a 2g Ethanol Process

Chemical engineering transactions, 2014

The production of ethanol from lignocellulosic biomass has gained increased interest in recent ye... more The production of ethanol from lignocellulosic biomass has gained increased interest in recent years, notably in the context of valorising agricultural by-products and providing fuels from renewable sources In order to increase their competitiveness, the energy demand of such processes needs to be minimised. This issue procures two benefits : (1) reduce utility consumption and (2) increase cogeneration possibility. In the present article we investigate this problem for a study process: ethanol production from sugarcane bagasse by enzymatic hydrolysis and glucose fermentation. We therefore apply a rigorous optimisation methodology in which we control certain design parameters in order to maximize the net production of utility. As a result, we obtain a design for our process which (1) eliminates the need for an external hot utility, (2) minimizes the need for the cold utility and (3) maximises the cogeneration possibility.As a conclusion, the proposed methodology provides a strong too...

$Research paper thumbnail of Method for capturing e.g. carbon dioxide compounds contained in natural gas to limit global warming phenomenon, involves making gas fractions to be in contact with absorbing solution fractions in absorbing sections arranged in same column$

Method for capturing e.g. carbon dioxide compounds contained in natural gas to limit global warming phenomenon, involves making gas fractions to be in contact with absorbing solution fractions in absorbing sections arranged in same column

Method and CO2 capture plant by forming gas hydrates

Process for CO2 capture by absorption with use of low steam temperature and a flash for regeneration

Process for the production of electricity by recovery of waste heat fluids from a refinery

Process for the production of electricity by recovering waste heat of gaseous fluids from a distillation column

Method for producing electricity, involves slackening obtained vaporized coolant in turbine driven by generator to produce electricity, and reinjecting part of condensed fluid into column

Review of design works for the conversion of sugarcane to first and second-generation ethanol and electricity

Renewable and Sustainable Energy Reviews, 2018

The conversion of sugarcane, the world's largest crop, to energy vectors, namely first and second... more The conversion of sugarcane, the world's largest crop, to energy vectors, namely first and second-generation ethanol and electricity, is an ongoing scientific endeavor. This conversion makes use of complex processes with numerous unit operations and process blocks addressed in literature. Such processes have also been the subject of detailed thermo-economic and techno-economic evaluations as well as the application of systematic methodologies involving simulation, heat integration, optimization and selection. Key works related to this field are discussed in this review along with their hypotheses and results. The main future technologies are also presented. This review is realized to provide the scientific community with accessible references, information and ideas that will ultimately help researchers build consolidated and optimal designs for this process.

Methodology for the design and comparison of optimal production configurations of first and first and second generation ethanol with power

Applied Energy, 2016

h i g h l i g h t s 1st generation (1G) ethanol and power vs. 1G and 2G ethanol and power process... more h i g h l i g h t s 1st generation (1G) ethanol and power vs. 1G and 2G ethanol and power processes. Application of simulation-optimiza tion-selection method for optimal process design. Optimization results have efficiencies, costs and utilities better than literature. 2G ethanol competitive only for 2G ethanol prices 2-4 times higher than normal. Similar design for two processes saves evaporation, utilities, hydrolysis and drying.

Methodology for the optimal design of an integrated sugarcane distillery and cogeneration process for ethanol and power production

Energy, 2016

The application of systematic methodologies for the optimal design of integrated processes has se... more The application of systematic methodologies for the optimal design of integrated processes has seen increased interest in literature, namely for bioprocesses. The development and application of such a methodology to ethanol and power production from sugarcane and leaves, in a combined distillery and cogeneration plant is investigated in this article. The methodology breaks down as follows: process simulation, heat integration and thermo-economic evaluation, bi-objective multi-variable evolutionary optimization, and process selection. The objective functions are exergy efficiency and capital cost, whereas the selection criterion is the maximization of the Net Present Value (NPV). This choice was motivated by the variation in process related market parameters and their impact on profitability. Optimization generated 31 optimal trade-off solutions with better results than literature. Exergy efficiency ranged between 37.6% and 41.7% and capital costs between 155 M$ and 210 M$. Process selection led to a single configuration maximizing NPV for four economic scenarios. The configuration's exergy efficiency and capital costs were equal to 40.63% and 163 M$. This point presented an optimal compromise between heat integration and capital costs. This article provides a breakthrough in the application of this methodology, to the investigated process specifically.

Optimisation technico-économique multiobjectif de systèmes de conversion d'énergie : cogénération électricité-hydrogène à partir d'un réacteur nucléaire de IVème génération

Http Www Theses Fr, 2008

Titre : Optimisation technico-économique multi-objectif de systèmes de conversion d'énergie: cogé... more

Methodology for the optimal design of an integrated first and second generation ethanol production plant combined with power cogeneration

Bioresource technology, Jan 30, 2016

The application of methodologies for the optimal design of integrated processes has seen increase... more The application of methodologies for the optimal design of integrated processes has seen increased interest in literature. This article builds on previous works and applies a systematic methodology to an integrated first and second generation ethanol production plant with power cogeneration. The methodology breaks into process simulation, heat integration, thermo-economic evaluation, exergy efficiency vs. capital costs, multi-variable, evolutionary optimization, and process selection via profitability maximization. Optimization generated Pareto solutions with exergy efficiency ranging between 39.2% and 44.4% and capital costs from 210M$ to 390M$. The Net Present Value was positive for only two scenarios and for low efficiency, low hydrolysis points. The minimum cellulosic ethanol selling price was sought to obtain a maximum NPV of zero for high efficiency, high hydrolysis alternatives. The obtained optimal configuration presented maximum exergy efficiency, hydrolyzed bagasse fractio...

Teaching Mono and Multi-objective Genetic Algorithms in Process Systems Engineering: an illustration with the MULTIGEN environment

OATAO is an open access repository that collects the work of Toulouse researchers and makes it fr... more

Optimization of electricity / hydrogen cogeneration from generation IV nuclear energy systems

Computer Aided Chemical Engineering, 2007

One of the great motivations of studying and developing Generation IV (Gen IV) reactors of VHTR (... more One of the great motivations of studying and developing Generation IV (Gen IV) reactors of VHTR (Very High Temperature Reactor) design concept is their capacity to efficiently produce both electricity and H 2 (hydrogen). This study aims at developing an optimization methodology for cogeneration systems of H 2 and electricity, from Gen IV nuclear reactors, with respect to energy constraints, economics and conjuncture in term of demand. It lies within a scope of a collaboration between the Laboratoire de Génie Chimique (Toulouse, France) and the Commissariat à l'Energie Atomique (CEA, Cadarache, France) in order to compare various cogeneration systems from both energy and economics viewpoint. This paper presents the results of an optimization study based on the "minimal destruction of exergy" or "exergy loss" concept. This criterion, used within the framework of a mono-objective genetic algorithm optimizer, was applied successfully to electric and heat production from Gen IV systems.

New IFP optimized first generation process for post-combustion carbon capture : HiCapt plus (TM)

10th International Conference on Greenhouse Gas Control Technologies, 2011

ACACIA Project – Development of a Post-Combustion CO2Capture Process. Case of the DMXTMProcess

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2014

Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°6,... more

The DMX™ process: An original solution for lowering the cost of post-combustion carbon capture

Energy Procedia, 2011

To make the deployment of carbon capture possible, it is highly needed to develop original soluti... more To make the deployment of carbon capture possible, it is highly needed to develop original solutions that induce low energy penalty and that are easy to operate. This paper aims at presenting the DMX™ process developed at IFP Energies nouvelles based on special solvents which are characterized by the formation of two immiscible phases for given temperature and CO 2 loading conditions. The concept of demixtion is briefly described in terms of physico-chemical properties, its interest and all required steps for appropriate process development are discussed. The corresponding process is presented and a technicoeconomic analysis is given. It is shown than one can reach a reboiler duty as low as 2.1 GJ/t CO 2 which is significantly lower than the 3.7 GJ/t CO 2 of the 30wt.% MEA reference process. It is also discussed that the energy consumption at reboiler cannot be the only parameter to consider for comparison with other processes and some further information about the DMX™ process are given. Operational issues are particularly discussed. In that sense, the performances of the DMX-1™ solvent in terms of degradation and corrosion are shown. Similarly a particular focus is made on the liquid/liquid separation which is a key aspect of the DMX™ process.

Hollow Fiber Membrane Contactors for Post-Combustion CO2Capture: A Scale-Up Study from Laboratory to Pilot Plant

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2013

Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°6,... more

A Technical and Economical Evaluation of CO2Capture from Fluidized Catalytic Cracking (FCC) Flue Gas

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2014

Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°6,... more

Hollow Fiber Membrane Contactors for CO2Capture: Modeling and Up-Scaling to CO2Capture for an 800 MWeCoal Power Station

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2013

Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°6,... more