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Papers by Michela Lanchi

Research paper thumbnail of Low Temperature Production of SO2 from H2SO4 In the Si Thermochemical Cycle by Using Iron(III) Sulfate Intermediate

Research paper thumbnail of Experimental and Theoretical Investigation into Alternative Versions of the Bunsen Reaction

Research paper thumbnail of New Process for Production of Bio-Diesel From Vegetable Oil

Research paper thumbnail of Hydrogen Production by Sulfur-Iodine Thermochemical Cycle: Experimental Tests on Hydriodic Section Concerning Iodine Purification System

Research paper thumbnail of Experimetal study of the Bunsen reaction for the S-I Thermochemical Cycle

Research paper thumbnail of S-I thermochemical cycle for H 2 production: a thermodynamic analysis of the phase equilibria of the system HI-I 2 -H 2 O

Chemical Engineering Transactions

It is widely agreed that the most energy consuming part of the S-I thermochemical cycle for hydro... more It is widely agreed that the most energy consuming part of the S-I thermochemical cycle for hydrogen production is represented by separation processes, especially for the HI decomposition section. The design of these processes and consequently the assessment of the real potential of the S-I cycle depends on the understanding of thermodynamic equilibrium and models construction of the ternary system HI-H 2 O-I 2 . In this paper, a new thermodynamic model for the electrolyte system HI-I 2 -H 2 O is proposed and validated against vapour-liquid (V-L) equilibrium data at atmospheric pressure. The proposed model provides a reliable description of V-L equilibrium of the ternary system of interest.

Research paper thumbnail of Hydrogen Production by Sulphur Iodine Cycle Fed by Solar Energy: Realization of a Laboratory Plant and Possible Spin-off On the Industrial Field

In a desirable future in which energy could be not related to greenhouse emissions of gases into ... more In a desirable future in which energy could be not related to greenhouse emissions of gases into the atmosphere and without consuming resources owned from few countries, with its resulting strategic use, the hydrogen produced from water using renewable energy sources seems the best solution. In this framework, ENEA has started a study of the thermolysis through thermochemical cycles powered by solar energy. The TEPSI project, in this regard, has as main objective, the construction of a plant for the production of 10 NL/h of hydrogen by sulfur-iodine cycle, which starting from water through a closed cycle of reactions that generate and consume iodine, hydriodic acid, sulfuric acid and sulfur dioxide, produces hydrogen and oxygen at a temperature compatible with current solar collectors technology and with a higher efficiency then the traditional methods of water thermolysis. A massive hydrogen production by this researched innovative methods will presumably be achieved by 2030, when ...

Research paper thumbnail of Hydrogen Production by Means of S-I Thermochemical Cycle Powered by Combined Solar-fossil Energy

Hydrogen production from water using sulfur-iodine (S-I) thermochemical cycle, powered by combine... more Hydrogen production from water using sulfur-iodine (S-I) thermochemical cycle, powered by combined solar and fossil heat sources, has been investigated in terms of process efficiency and costs. The combined energy supply has been conceived in order to operate the chemical process continuously: a solar concentrator plant supplies thermal load for services at medium temperatures (<550°C) by the use of molten salts as energy carrier with a large scale heat storage, while a fossil fuel furnace provides heat load for endothermic reactor operating at higher temperatures. This device permits the plant to provide continuously thermal power at a constant rate, regardless of variations in solar power availability. Moreover, the S-I chemical process has been interfaced to a methanol production plant fed with the carbon oxides generated by fossil fuel combustion and a fraction of the hydrogen produced. Since the sulfuric acid concentration/decomposition section of the chemical plant is inter...

Research paper thumbnail of Synthèse de métaux supportés Ni/Al2O3 et Pt/Al2O3 pour la production de H2 à partir de HI

Research paper thumbnail of Synthesis of the catalyst Ni/Al2O3 for the production of H2 from HI decomposition in the thermochemical water splitting

Research paper thumbnail of Supported Catalysts in Heterogeneous Gas Phase Hydrogen Iodide Decomposition Reaction: a Screening Study

Research paper thumbnail of ON-SUN DEMONSTRATION OF THE HYDROGEN RELEASING STEP OF THE MIXED FERRITES THERMOCHEMICAL CYCLE: THERMAL CHARACTERIZATION OF THE REACTOR

Research paper thumbnail of Chemical Characterization of Sulphur-Iodine Thermochemical Cycle Flowstreams by Raman Spectroscopy

Research paper thumbnail of Thermal characterization of a cavity receiver for hydrogen production by thermochemical cycles operating at moderate temperatures

Research paper thumbnail of Experimental and Theoretical Investigation into the Formation and Reactivity of M(Cp)(CO) 2 (CO 2 ) (M = Mn or Re) in Liquid and Supercritical CO 2 and the Effect of Different CO 2 Coordination Modes on Reaction Rates with CO, H 2 , and N 2

Research paper thumbnail of Hydrogen production by flue gas through sulfur–iodine thermochemical process: Economic and energy evaluation

International Journal of Hydrogen Energy, 2012

Research paper thumbnail of Energy and economic assessment of an industrial plant for the hydrogen production by water-splitting through the sulfur-iodine thermochemical cycle powered by concentrated solar energy

International Journal of Hydrogen Energy, 2012

Research paper thumbnail of HI extraction by H3PO4 in the Sulfur–Iodine thermochemical water splitting cycle: Composition optimization of the HI/H2O/H3PO4/I2 biphasic quaternary system

International Journal of Hydrogen Energy, 2009

Research paper thumbnail of Iodine compounds speciation in HI–I2 aqueous solutions by Raman spectroscopy

International Journal of Hydrogen Energy, 2012

Research paper thumbnail of Use of metallic Ni for H2 production in S–I thermochemical cycle: Experimental and theoretical analysis

International Journal of Hydrogen Energy, 2009

ABSTRACT The gaseous hydrogen iodide decomposition is a thermodynamically limited reaction and su... more ABSTRACT The gaseous hydrogen iodide decomposition is a thermodynamically limited reaction and subsequently a considerable energy expense for the separation and recirculation of the unreacted species is required. In addition the homogeneous gas phase decomposition of hydrogen iodide has a very low rate and the use of a catalytic system, which is generally highly expensive, is necessary. Hence, with the aim of overcoming the bottleneck represented by the hydrogen releasing step of the Sulphur–Iodine (S–I) cycle in terms of costs and process efficiency, in the present work an alternative version of the HI decomposition section (HIx section) is proposed. In that alternative configuration the addition of metallic nickel into the heavy phase coming from Bunsen reaction is conceived in order to quantitatively obtain hydrogen at low temperature. A theoretical and experimental investigation has been performed, a new cycle has been conceived and the resulting energy demand assessed.

Research paper thumbnail of Low Temperature Production of SO2 from H2SO4 In the Si Thermochemical Cycle by Using Iron(III) Sulfate Intermediate

Research paper thumbnail of Experimental and Theoretical Investigation into Alternative Versions of the Bunsen Reaction

Research paper thumbnail of New Process for Production of Bio-Diesel From Vegetable Oil

Research paper thumbnail of Hydrogen Production by Sulfur-Iodine Thermochemical Cycle: Experimental Tests on Hydriodic Section Concerning Iodine Purification System

Research paper thumbnail of Experimetal study of the Bunsen reaction for the S-I Thermochemical Cycle

Research paper thumbnail of S-I thermochemical cycle for H 2 production: a thermodynamic analysis of the phase equilibria of the system HI-I 2 -H 2 O

Chemical Engineering Transactions

It is widely agreed that the most energy consuming part of the S-I thermochemical cycle for hydro... more It is widely agreed that the most energy consuming part of the S-I thermochemical cycle for hydrogen production is represented by separation processes, especially for the HI decomposition section. The design of these processes and consequently the assessment of the real potential of the S-I cycle depends on the understanding of thermodynamic equilibrium and models construction of the ternary system HI-H 2 O-I 2 . In this paper, a new thermodynamic model for the electrolyte system HI-I 2 -H 2 O is proposed and validated against vapour-liquid (V-L) equilibrium data at atmospheric pressure. The proposed model provides a reliable description of V-L equilibrium of the ternary system of interest.

Research paper thumbnail of Hydrogen Production by Sulphur Iodine Cycle Fed by Solar Energy: Realization of a Laboratory Plant and Possible Spin-off On the Industrial Field

In a desirable future in which energy could be not related to greenhouse emissions of gases into ... more In a desirable future in which energy could be not related to greenhouse emissions of gases into the atmosphere and without consuming resources owned from few countries, with its resulting strategic use, the hydrogen produced from water using renewable energy sources seems the best solution. In this framework, ENEA has started a study of the thermolysis through thermochemical cycles powered by solar energy. The TEPSI project, in this regard, has as main objective, the construction of a plant for the production of 10 NL/h of hydrogen by sulfur-iodine cycle, which starting from water through a closed cycle of reactions that generate and consume iodine, hydriodic acid, sulfuric acid and sulfur dioxide, produces hydrogen and oxygen at a temperature compatible with current solar collectors technology and with a higher efficiency then the traditional methods of water thermolysis. A massive hydrogen production by this researched innovative methods will presumably be achieved by 2030, when ...

Research paper thumbnail of Hydrogen Production by Means of S-I Thermochemical Cycle Powered by Combined Solar-fossil Energy

Hydrogen production from water using sulfur-iodine (S-I) thermochemical cycle, powered by combine... more Hydrogen production from water using sulfur-iodine (S-I) thermochemical cycle, powered by combined solar and fossil heat sources, has been investigated in terms of process efficiency and costs. The combined energy supply has been conceived in order to operate the chemical process continuously: a solar concentrator plant supplies thermal load for services at medium temperatures (<550°C) by the use of molten salts as energy carrier with a large scale heat storage, while a fossil fuel furnace provides heat load for endothermic reactor operating at higher temperatures. This device permits the plant to provide continuously thermal power at a constant rate, regardless of variations in solar power availability. Moreover, the S-I chemical process has been interfaced to a methanol production plant fed with the carbon oxides generated by fossil fuel combustion and a fraction of the hydrogen produced. Since the sulfuric acid concentration/decomposition section of the chemical plant is inter...

Research paper thumbnail of Synthèse de métaux supportés Ni/Al2O3 et Pt/Al2O3 pour la production de H2 à partir de HI

Research paper thumbnail of Synthesis of the catalyst Ni/Al2O3 for the production of H2 from HI decomposition in the thermochemical water splitting

Research paper thumbnail of Supported Catalysts in Heterogeneous Gas Phase Hydrogen Iodide Decomposition Reaction: a Screening Study

Research paper thumbnail of ON-SUN DEMONSTRATION OF THE HYDROGEN RELEASING STEP OF THE MIXED FERRITES THERMOCHEMICAL CYCLE: THERMAL CHARACTERIZATION OF THE REACTOR

Research paper thumbnail of Chemical Characterization of Sulphur-Iodine Thermochemical Cycle Flowstreams by Raman Spectroscopy

Research paper thumbnail of Thermal characterization of a cavity receiver for hydrogen production by thermochemical cycles operating at moderate temperatures

Research paper thumbnail of Experimental and Theoretical Investigation into the Formation and Reactivity of M(Cp)(CO) 2 (CO 2 ) (M = Mn or Re) in Liquid and Supercritical CO 2 and the Effect of Different CO 2 Coordination Modes on Reaction Rates with CO, H 2 , and N 2

Research paper thumbnail of Hydrogen production by flue gas through sulfur–iodine thermochemical process: Economic and energy evaluation

International Journal of Hydrogen Energy, 2012

Research paper thumbnail of Energy and economic assessment of an industrial plant for the hydrogen production by water-splitting through the sulfur-iodine thermochemical cycle powered by concentrated solar energy

International Journal of Hydrogen Energy, 2012

Research paper thumbnail of HI extraction by H3PO4 in the Sulfur–Iodine thermochemical water splitting cycle: Composition optimization of the HI/H2O/H3PO4/I2 biphasic quaternary system

International Journal of Hydrogen Energy, 2009

Research paper thumbnail of Iodine compounds speciation in HI–I2 aqueous solutions by Raman spectroscopy

International Journal of Hydrogen Energy, 2012

Research paper thumbnail of Use of metallic Ni for H2 production in S–I thermochemical cycle: Experimental and theoretical analysis

International Journal of Hydrogen Energy, 2009

ABSTRACT The gaseous hydrogen iodide decomposition is a thermodynamically limited reaction and su... more ABSTRACT The gaseous hydrogen iodide decomposition is a thermodynamically limited reaction and subsequently a considerable energy expense for the separation and recirculation of the unreacted species is required. In addition the homogeneous gas phase decomposition of hydrogen iodide has a very low rate and the use of a catalytic system, which is generally highly expensive, is necessary. Hence, with the aim of overcoming the bottleneck represented by the hydrogen releasing step of the Sulphur–Iodine (S–I) cycle in terms of costs and process efficiency, in the present work an alternative version of the HI decomposition section (HIx section) is proposed. In that alternative configuration the addition of metallic nickel into the heavy phase coming from Bunsen reaction is conceived in order to quantitatively obtain hydrogen at low temperature. A theoretical and experimental investigation has been performed, a new cycle has been conceived and the resulting energy demand assessed.

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