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Sophia Haussener

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Related publications (135)

Solar fuel processing efficiency for ceria redox cycling using alternative oxygen partial pressure reduction methods

Solar-driven non-stoichiometric thermochemical redox cycling of ceria for the conversion of solar energy into fuels shows promise in achieving high solar-to-fuel efficiency. This efficiency is significantly affected by the operating conditions, e.g. redox ...

Pergamon-Elsevier Science Ltd2015

Design of Compact Photoelectrochemical Cells for Water Splitting

Sophia Haussener

Solar driven water splitting can be achieved by coupling electrolyzers with PhotoVoltaics (PV). Integration of both functions in a compact PhotoElectroChemical (PEC) cell is an attractive option but presents significant scientific challenges. In this work, ...

2015

Phase Change Material Systems for High Temperature Heat Storage

Sophia Haussener, Ehsan Rezaei, David Yann Samuel Perraudin, Selmar Rudolf Binder, Alberto Ortona

Efficient, cost effective, and stable high-temperature heat storage material systems are important in applications such as high-temperature industrial processes (metal processing, cement and glass manufacturing, etc.), or electricity storage using advanced ...

2015

Vapor-fed microfluidic hydrogen generator

Demetri Psaltis, Christophe Moser, Sophia Haussener, Seyyed Mohammad Hosseini Hashemi, Mikaël Dumortier, Miguel Antonio Modestino

Water-splitting devices that operate with humid air feeds are an attractive alternative for hydrogen production as the required water input can be obtained directly from ambient air. This article presents a novel proof-of-concept microfluidic platform that ...

Royal Society of Chemistry2015

Solar hydrogen reaching maturity

Sophia Haussener, Mikaël Dumortier

Increasingly vast research efforts are devoted to the development of materials and processes for solar hydrogen production by light-driven dissociation of water into oxygen and hydrogen. Storage of solar energy in chemical bonds resolves the issues associa ...

2015

Robust production of purified H-2 in a stable, self-regulating, and continuously operating solar fuel generator

Sophia Haussener, Miguel Antonio Modestino

The development of practical solar-driven electrochemical fuel generators requires the integration of light absorbing and electrochemical components into an architecture that must also provide easy separation of the product fuels. Unfortunately, many of th ...

Royal Society of Chemistry2014

Pore-level engineering of macroporous media for increased performance of solar-driven thermochemical fuel processing

Aldo Steinfeld, Sophia Haussener, Silvan Suter

The performance of high-temperature solar reactors incorporating porous ceramic materials that serve as radiative absorbers and chemical reaction sites can be improved significantly by tailoring their pore structure. We investigated the changes in their ef ...

Elsevier2014

Heat transfer modeling in integrated photoelectrochemical hydrogen generators using concentrated irradiation

Sophia Haussener, Saurabh Yuvraj Tembhurne, Mikaël Dumortier

The direct conversion of solar energy and water into a storable fuel via integrated photoelectrochemical (PEC) devices is investigated. Particularly, the proposed device uses concentrated solar irradiation in order to minimize the amount of rare and expens ...

2014

Simulations of the irradiation and temperature dependence of the efficiency of tandem photoelectrochemical water-splitting systems

Sophia Haussener

The instantaneous efficiency of an operating photoelectrochemical solar-fuel-generator system is a complicated function of the tradeoffs between the light intensity and temperature-dependence of the photovoltage and photocurrent, as well as the losses asso ...

Royal Society of Chemistry2013

An analysis of the optimal band gaps of light absorbers in integrated tandem photoelectrochemical water-splitting systems

Sophia Haussener

The solar-to-hydrogen (STH) efficiency limits, along with the maximum efficiency values and the corresponding optimal band gap combinations, have been evaluated for various combinations of light absorbers arranged in a tandem configuration in realistic, op ...

Royal Society of Chemistry2013

Review of Heat Transfer Research for Solar Thermochemical Applications

Aldo Steinfeld, Sophia Haussener

2013

Morphology Engineering of Porous Media for Enhanced Solar Fuel and Power Production

Sophia Haussener, Silvan Suter

The favorable and adjustable transport properties of porous media make them suitable components in reactors used for solar energy conversion and storage processes. The directed engineering of the porous media's morphology can significantly improve the perf ...

Springer Verlag2013

Simulations of the Irradiation and Temperature Dependence of the Efficiency of Tandem Photoelectrochemical Water-splitting Systems

Sophia Haussener

The efficiency of an operating photoelectrochemical solar-fuels-generator system is determined by the system design, the properties and morphology of the system's components, and the operational conditions. We used a previously developed model comprising o ...

Electrochemical Soc Inc2013

Net primary energy balance of a solar-driven photoelectrochemical water-splitting device

Sophia Haussener

A fundamental requirement for a renewable energy generation technology is that it should produce more energy during its lifetime than is required to manufacture it. In this study we evaluate the primary energy requirements of a prospective renewable energy ...

Royal Society of Chemistry2013

Integrated microfluidic test-bed for energy conversion devices

Sophia Haussener, Miguel Antonio Modestino

Energy conversion devices require the parallel functionality of a variety of components for efficient operation. We present a versatile microfluidic test-bed for facile testing of integrated catalysis and mass transport components for energy conversion via ...

Royal Society of Chemistry2013

Multi-Scale Modelling of a Solar Reactor for the High-Temperature Step of a Sulphur-Iodine-Based Water Splitting Cycle

Aldo Steinfeld, Sophia Haussener

The 3-step sulphur-iodine-based thermochemical cycle for splitting water is considered. The high-temperature step consists of the evaporation, decomposition, and reduction of H2SO4 to SO2 using concentrated solar process heat. This step is followed by the ...

ASME2012

Separator design criteria for a solar-hydrogen electrochemical generator

Sophia Haussener

American Chemical Society2012

High Performance Hydrogen/Bromine Redox Flow Battery for Grid-Scale Energy Storage

Sophia Haussener

The electrochemical behavior of a promising hydrogen/bromine redox flow battery is investigated for grid-scale energy-storage application with some of the best redox-flow-battery performance results to date, including a peak power of 1.4 W/cm(2) and a 91% ...

Electrochemical Society2012

Effective Heat and Mass Transport Properties of Anisotropic Porous Ceria for Solar Thermochemical Fuel Generation

Aldo Steinfeld, Sophia Haussener

High-resolution X-ray computed tomography is employed to obtain the exact 3D geometrical configuration of porous anisotropic ceria applied in solar-driven thermochemical cycles for splitting H2O and CO2. The tomography data are, in turn, used in direct por ...

MDPI2012

HycycleS: a project on nuclear and solar hydrogen production by sulphur-based thermochemical cycles

Aldo Steinfeld, Sophia Haussener

2011

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