Publications by Nordahl Autissier

Heterogeneous Catalytic Reactor for Hydrogen Production from Formic Acid and Its Use in Polymer Electrolyte Fuel Cells

Gabor Laurenczy, Nordahl Autissier, Martin Grasemann, Katerina Stefania Sordakis, Andrew Francis Dalebrook

A proof-of-concept prototype of a medium-scale heterogeneous catalytic reactor for continuous production of hydrogen through formic acid (FA) dehydrogenation has been developed. A commercial proton exchange membrane (PEM) fuel cell (FC) fed with the result ...

2018

Dehydrogenation of Formic Acid over a Homogeneous Ru-TPPTS Catalyst: Unwanted CO Production and Its Successful Removal by PROX

Gabor Laurenczy, Nordahl Autissier, Veronica Henricks

Formic acid (FA) is considered as a potential durable energy carrier. It contains ~4.4 wt % of hydrogen (or 53 g/L) which can be catalytically released and converted to electricity using a proton exchange membrane (PEM) fuel cell. Although various catalyst ...

2017

Small scale SOFC systems : design, optimization and experimental results

Nordahl Autissier

The increasing cost of carbon based fuels pushes the electricity generation market towards more efficient electricity generation technologies. In this context, fuel cells offer the opportunity to increase efficiency and lower CO2 and NOx emissions, in part ...

EPFL2008

Modeling and Study of the Influence of Sealing on a Solid Oxide Fuel Cell

Daniel Favrat, Jan Van Herle, Zacharie Wuillemin, Arata Nakajo, Minh-Tâm Luong, Nordahl Autissier

The properties of sealing materials are important for the performance and reliability of solid oxide fuel cells (SOFCs). Even if the properties of a sealing material can be studied separately, it remains difficult to quantify the effect of an imperfect sea ...

2008

Impact of Materials and Design on Solid Oxide Fuel Cell Stack Operation

Stefan Diethelm, Jan Van Herle, Zacharie Wuillemin, Arata Nakajo, Nordahl Autissier

Planar SOFC stack technology based on a unique concept (SOFConnex™) uses structured gas distribution layers between unprofiled metal sheet interconnects and thin Ni-YSZ anode supported electrolyte cells. The layers are flexible both in material and designa ...

2008

Thermo-economic Optimization of a Solid Oxide Fuel Cell, Gas Turbine Hybrid System

Daniel Favrat, Jan Van Herle, Francesca Palazzi, François Maréchal, Nordahl Autissier

Large scale power production benefits from the high efficiency of gas-steam combined cycles. In the lower power range, fuel cells are a good candidate to combine with gas turbines. Such systems can achieve efficiencies exceeding 60%. High temperature Solid ...

2007

Design of 500 W Class SOFC Stack with Homogeneous Cell Performance

Stefan Diethelm, Jan Van Herle, Zacharie Wuillemin, Arata Nakajo, Emily Thorn, Nordahl Autissier

Our planar SOFC stacking technology uses unprofiled metallic interconnects (MIC) and thin cells of tape cast anode supported YSZ. The key element is the gas diffusion layer (GDL) between cell and MIC, which consists of so-called SOFConnex™. Using square ce ...

The Electrochemical Society2007

Local current measurement in a solid oxide fuel cell repeat element

Diego Larrain, Daniel Favrat, Jan Van Herle, Nordahl Autissier

A planar solid oxide fuel cell repeating unit, 50 cm2 in total active electrode size, consisting of an anode supported electrolyte cell bearing two 7 mm holes for fuel and air injection, and contacted to two dense metal current collector plates ...

2007

Dynamic behaviour of SOFC short stacks

Diego Larrain, Raphaël Ihringer, Jan Van Herle, Joseph Sfeir, Nicolas Badel, Nordahl Autissier

Electrical output behaviour obtained on solid oxide fuel cell stacks, based on planar anode supported cells (50 or 100 cm2 active area) and metallic interconnects, is reported. Stacks (1–12 cells) have been operated with cathode air and anode hydrogen flow ...

2006

Modeling and experimental validation of solid oxide fuel cell materials and stacks

Diego Larrain, Daniel Favrat, Jan Van Herle, Zacharie Wuillemin, Nordahl Autissier

Results on solid oxide fuel cell stacks tested at 800° C with H2 fuel and using planar Ni-zirconia anode supported cells, 80x80x0.2 mm in size, are presented. Modeling and numerical simulation is used to interpret observed results and develop improved desi ...

2005

Modeling and study of the influence of sealing on a solid oxide fuel cell

Daniel Favrat, Jan Van Herle, Zacharie Wuillemin, Minh-Tâm Luong, Nordahl Autissier

The properties of sealing materials are important for the performance and reliability of solid oxide fuel cells (SOFC). Even if the properties of a sealing material can be studied separately, it remains difficult to quantify the effect of an imperfect seal ...

2005

PROGRESS IN STACK POWER DENSITY USING THE SOFCONNEX™ CONCEPT

Alexandre Closset, Stefan Diethelm, Diego Larrain, Raphaël Ihringer, Jan Van Herle, Zacharie Wuillemin, Christian Blanc, Emily Thorn, Nordahl Autissier

Our SOFC stack development technology is based on the unique SOFConnexTM concept, using flexible gas distribution layers between metal sheet interconnect and thin ASE cells. Flexibility is given both in material and design. This ensures proper electrical c ...

The Electrochemical Society2005

Thermo-economic Optimization of a Solid Oxide Fuel Cell, Gas Turbine Hybrid System

Daniel Favrat, Jan Van Herle, Francesca Palazzi, François Maréchal, Nordahl Autissier

Background: The electricity production market benefits from combined cycles with their high efficiency. In the lower power range, Fuel Cells are a good candidate to combine with gas turbines. Such systems can achieve efficiencies of 60% and more. High tem ...

2005

A Methodology for Thermo-Economic Modeling and Optimization of SOFC Systems

Jan Van Herle, Francesca Palazzi, François Maréchal, Nordahl Autissier

Fuel cell systems integrate the fuel cell technology with fuel processing and post processing. A thermo-economic optimization method has been developed to systematically generate the most attractive configurations of the integrated system. In the developed ...

2005

CFD simulation tool for solid oxide fuel cells

Diego Larrain, Daniel Favrat, Jan Van Herle, Nordahl Autissier

A 3D simulation tool for solid oxide fuel cells is presented. The aim of this work is to predict current density, flow, temperature and concentration fields in order to compare and optimize repeat element geometry for a whole stack. A commercial CFD tool w ...

2004