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Christian Ludwig

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Publications associées (136)

Intensity of Light Incident and Photoperiod of LED illumination based system on Scenedesmus vacuolatus growth

Jean-Paul Schwitzguebel, Christof Holliger, Olivier Laurent Emery, Christian Ludwig, Mariluz Bagnoud, Eduardo Pereira Gomes

2012

Microalgal carotenoid recovery in a biorefinery approach

Jean-Paul Schwitzguebel, Christof Holliger, Olivier Laurent Emery, Christian Ludwig, Mariluz Bagnoud, Eduardo Pereira Gomes

2012

Heat, Electricity, or Transportation? The Optimal Use of Residual and Waste Biomass in Europe from an Environmental Perspective

Bernhard Steubing, Christian Ludwig

The optimal use of forest energy wood, industrial wood residues, waste wood, agricultural residues, animal manure, biowaste, and sewage sludge in 2010 and 2030 was assessed for Europe. An energy system model was developed comprising 13 principal fossil tec ...

2012

Online elemental analysis of process gases with ICP-OES: A case study on waste wood combustion

Christian Ludwig, Marco Wellinger

A mobile sampling and measurement system for the analysis of gaseous and liquid samples in the field was developed. An inductively coupled plasma optical emission spectrometer (ICP-OES), which is built into a van, was used as detector. The analytical syste ...

Elsevier2012

Local, Time-Resolved and Element-Specific Investigations of Corrosion Processes for the Development of Biodegradable Mg Alloys

Christian Ludwig, Noémie Elise Ott

ECS The Electrochemical Society2012

Preliminary evaluation of risks related to waste incineration of polymer nanocomposites

Christian Ludwig

If nanotechnology proves to be successful for bulk applications, large quantities of nanocomposites are likely to end up in municipal solid waste incineration (MSWI) plants. Various studies indicate that nanoobjects might be harmful to human health and the ...

Elsevier2012

Recovering nutrients from an algal biofuel production process

Christian Ludwig, Gaël Peng, Mariluz Bagnoud, Frédéric Vogel

2012

Gasification of Hay in a Bench Scale Fluidised Bed Reactor with Emphasis on the Suitability for Gas Turbines

Christian Ludwig, Marco Wellinger

Thermal gasification of pasture plants (hay) is so far considered as difficult mainly due to the high amount of inorganics (ash, alkalis). Under certain circumstances it could be an additional resource for power production. There has been some experiments ...

Elsevier2012

Liquid-Quench Sampling System for the Analysis of Gas Streams from Biomass Gasification Processes. Part 2: Sampling Condensable Compounds

Christian Ludwig, Tilman J. Schildhauer

The performance of a continuous liquid-quench-based sampling system is presented, with regard to the sampling of condensable compounds. Toluene is used as a model molecule representing tars commonly found in the gas streams of biomass gasification plants a ...

Amer Chemical Soc2012

Fire performance of water-cooled GFRP columns. Part I: Fire endurance investigation

Thomas Keller, Yu Bai, Christian Ludwig

Structural fire endurance experiments were conducted on full-scale cellular glass fiber-reinforced (GFRP) columns under axial compression and subjected to ISO834 fire exposure from one side. Unprotected columns can resist fire for more than 30 min, which i ...

American Society of Civil Engineers2011

Mitigating Cr Contamination by Hot Air Filtering in Solid Oxide Fuel Cells

Aïcha Hessler-Wyser, Jan Van Herle, Josef Andreas Schuler, Christian Ludwig

Cr contamination, generated by system components located upstream a solid oxide fuel cell (SOFC) and responsible for Cr-poisoning induced air electrode performance degradation, must be suppressed by hindering the access of Cr pollutants to the cathode comp ...

Electrochemical Society2011

Sampling and Online Analysis of Alkalis in Thermal Process Gases with a Novel Surface Ionization Detector

Christian Ludwig, Marco Wellinger

When using biomass or waste as a feedstock for power production, alkalis are a major concern because of their negative effects on equipment. To investigate the release behavior of alkalis and the effectiveness of countermeasures, it is indispensable to qua ...

American Chemical Society2011

Life cycle assessment of SNG from wood for heating, electricity, and transportation

Bernhard Steubing, Christian Ludwig

The conversion of wood to synthetic natural gas (SNG) via gasification and catalytic methanation is a renewable close to commercialization technology that could substitute fossil fuels and alleviate global warming. In order to assure that it is beneficial ...

Elsevier2011

Air Side Contamination in Solid Oxide Fuel Cell Stack Testing

Aïcha Hessler-Wyser, Jan Van Herle, Zacharie Wuillemin, Josef Andreas Schuler, Christian Gehrig, Christian Ludwig

Solid Oxide Fuel Cells (SOFCs) are likely candidates for electricity production with high efficiency and promise reasonable fuel tolerance. While fuel impurities are known anode poisons, less attention is brought to air-purity, especially to air-side conta ...

Elsevier2011

Assessing the life cycle costs and environmental performance of lightweight materials in automobile applications

Véronique Michaud, Jérôme Payet, Christian Ludwig, Robert Andrew Witik

Life cycle assessment (LCA) and manufacturing focused life cycle costing are used to evaluate the potential advantages of composites in automotive applications. The life cycle costs and environmental performance of several suitable lightweight polymer comp ...

2011

Transmission of Alkali Aerosols through Sampling Systems

Christian Ludwig, Tilman J. Schildhauer

In biomass gasification, particles such as condensed alkali salts pose a threat on equipment. Due to high loads of condensable tars in the gases, sampling of these particles to liquids and subsequent analysis of the liquid is frequently the method of choic ...

2011

Integrated Minerals Recycling In Biofuel Production – The Sunchem Process

Martin Brandenberger, Andrea Testino, Christian Ludwig, Rudolf Paul Wilhelm Jozef Struis, Mariluz Bagnoud, Frédéric Vogel

2011

Air Side Contamination in SOFC Stack Testing

Aïcha Hessler-Wyser, Jan Van Herle, Zacharie Wuillemin, Josef Andreas Schuler, Christian Gehrig, Christian Ludwig

2010

Fire endurance performance of cellular GFRP columns with water-cooling system

Thomas Keller, Yu Bai, Christian Ludwig

Experimental results on the fire endurance of full-scale glass fiber-reinforced polymer (GFRP) composite columns are reported in this paper. The pultruded four-cell profiles were first loaded to axial compression (uniform serviceability stress of 5 MPa) an ...

DEStech Publications Inc.2010

Size-fractionated characterization and quantification of nanoparticle release rates from a consumer spray product containing engineered nanoparticles

Christian Ludwig, Harald Hagendorfer, Andrea Ulrich

This study describes methods developed for reliable quantification of size- and element-specific release of engineered nanoparticles (ENP) from consumer spray products. A modified glove box setup was designed to allow controlled spray experiments in a part ...

Springer Verlag2010

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