Concept

Steam

Related publications (88)

Can steam play a role in low to medium power from low temperature heat?

François Maréchal, Daniel Favrat, Jonathan Demierre

Rankine cycles for low to medium power and low temperature heat using water as working fluid, were almost written off. The main arguments speaking against them are reviewed in this paper and the conceptual design of the equipment entirely revisited. An adv ...

2006

Oxygen transfer and catalytic properties of nickel iron oxides for steam reforming of methane

Rudolf Paul Wilhelm Jozef Struis

Nickel iron oxide (NiFe2O4) has been tested as a combined catalyst precursor and oxygen transfer material for improved conversion of methane into syngas. Thermogravimetric measurements with simultaneous gas analysis have demonstrated the superior behavior ...

2006

Validation of glutathione quantitation from STEAM spectra against edited 1H NMR spectroscopy at 4T: Application to schizophrenia

Rolf Gruetter

Objective: Quantitation of glutathione (GSH) in the human brain in vivo using short echo time 1 H NMR spectroscopy is challenging because GSH resonances are not easily resolved. The main objective of this study was to validate such quantitation in a clinic ...

2005

Catalytic activity of FeZSM-5 zeolites in benzene hydroxylation by N2O: The role of geometry characterized by fractal dimensions

Lioubov Kiwi

The fractal dimensions of FeZSM-5 zeolites were used to characterize the change in their geometry depending on different post-synthesis treatments. The fractal dimension values were estimated from the Dubinin-Astakhov isotherms of nitrogen adsorption and r ...

2005

Multi-Criteria Optimization of an Advanced Combined Cycle Power Plant including CO2 Separation Options

François Maréchal, Daniel Favrat, Hongtao Li, Meinrad Bürer

This paper illustrates a methodology developed in order to facilitate the analysis of complex systems characterized by a large number of technical, economical and environmental parameters. Thermo-economic modeling of a natural gas combined cycle including ...

2004

Hydrogen production for fuel cell application in an autothermal micro-channel reactor

Albert Renken, Pierre Reuse

Results concerning the coupling of the steam reforming and total oxidn. of methanol in a two-passage reactor are presented. A com. available copper-based catalyst is used for the steam reforming. For the total oxidn., a highly active cobalt oxide catalyst ...

2004

Etude du phénomène de l'élimination de la mémoire de forme du bois densifié par post-traitement thermo-hydro-mécanique

Owing to its porous cellular structure and polymeric components, wood can be easily shaped in its transversal direction when it is heated and has sufficient water content. Thanks to this thermohydrous behaviour many manufacturing processes such as densific ...

EPFL2004

Micro-structured string-reactor for autothermal production of hydrogen

Albert Renken, Lioubov Kiwi, Chrystèle Horny

Novel micro-structured string-reactor designed as catalytically active wires placed in parallel into a tube was developed. The small diam. of the channels (.apprx.100 mm) leads to a short radial diffusion time, a narrow residence time distribution, and a l ...

2004

Process flow model of solid oxide fuel cell system supplied with sewage biogas

François Maréchal, Daniel Favrat, Jan Van Herle

A model for a 1000 kW class solid oxide fuel cell (SOFC) system running on biogas from a sewage sludge digestion plant was implemented in a process flow scheme using external steam reforming. The model stack consisted of planar anode supported cells operat ...

Elsevier2004

Vibrational mode-specific reaction of methane on a nickel surface

Thomas Rizzo, Rainer Beck, Plinio Maroni, Thanh Tung Dang, Mathieu Schmid

The dissociation of methane on a nickel catalyst is a key step in steam reforming of natural gas for hydrogen production. Despite substantial effort in both experiment and theory, there is still no atomic-scale description of this important gas-surface rea ...

2003

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