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Christian Ludwig

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Related publications (134)

Page 5 of 7

Measuring air borne nanoparticles for characterizing hyphenated RDD-SMPS-ICPMS instrumentation

Christian Ludwig, Adrian Hess

Scanning Mobility Particle Sizer (SMPS) and Inductively Coupled Plasma Mass Spectrometry (ICPMS), complemented by a Rotating Disk Diluter (RDD) to a hyphenated RDD-SMPS-ICPMS measuring setup, allow online and simultaneous determination of size distribution ...

Elsevier2016

Algal cellulose, production and potential use in plastics: Challenges and opportunities

Tobias Borgmeyer, Christian Ludwig, Horst Pick, Eya Nicodeme, Adrian Pulgarin, Enio Daniel Zanchetta

The development of new biodegradable plastic materials from renewable sources is a major challenge for plastic industries to provide sustainable alternatives to petroleum plastic. Bio-based plastics are generally obtained from photosynthetic biomass such a ...

2021

Organic-sulfur poisoning of solid oxide fuel cell operated on bio-syngas

Jan Van Herle, Christian Ludwig, Stefan Diethelm, Hossein Madi

This study experimentally analyzes the performance and degradation issues of an anode supported (AS) Ni-YSZ solid oxide fuel cell exposed to thiophene (C4H4S). The impact of this organic sulfur compound on the performance of SOFC Ni-YSZ anodes is reported ...

Elsevier2016

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

Jan-Anders Edvin Maansson, Véronique Michaud, Christian Ludwig, Robert Andrew Witik, Jérôme Payet

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

Energy and Materials from Waste and Biomass Using Hydrothermal Processes

Christian Ludwig, Frédéric Vogel, Wolfram Scharnhorst

2006

Solid oxide fuel cell anode degradation by the effect of hydrogen chloride in stack and single cell environments

Christian Ludwig, Jan Van Herle, Stefan Diethelm, Hossein Madi

The poisoning effect by hydrogen chloride (HCl) on state-of-the-art Ni anode-supported solid oxide fuel cells (SOFCs) at 750 degrees C is evaluated in either hydrogen or syngas fuel. Experiments are performed on single cells and short stacks and HCl concen ...

2016

Abiotic stress approaches for enhancing cellulose and chitin production in Chlorella vulgaris

Christian Ludwig, Horst Pick, Eya Nicodeme, Ayush Agarwal, Enio Daniel Zanchetta

Several lines of evidence point to the presence of both, cellulose and chitin as structural constituents of the Chlorella vulgaris cell wall. These biopolymers are favourable building blocks for many sustainable industrial applications for instance as bioc ...

Elsevier BV2025

Measuring evaporation rates of metal compounds from solid samples

Christian Ludwig

A thermogravimeter (TGA, Mettler-Toledo TGA/SDTA851(e)) was connected to an inductively coupled plasma optical emission spectrometer (ICP-OES, Varian Liberty 110) using a condensation interface (CI), which transforms gaseous high-boiling-temperature substa ...

2007

Online Detection of Selenium and Its Retention in Reducing Gasification Atmosphere

Christian Ludwig, Andrea Testino, Adrian Hess

The emission of selenium from coal gasification processes can cause harm to the environment and downstream equipment. With upcoming legislation, reliable detection as well as control of such gas species become crucial. This study therefore addresses the de ...

American Chemical Society2016

Thermal treatment of metal-enriched biomass produced from heavy metal phytoextraction

Christian Ludwig

Phytoextraction is an environmentally sound method for cleaning up sites that are contaminated with toxic heavy metals. However, the method has been questioned because it produces a biomass-rich secondary waste containing the extracted metals. Therefore, f ...

2005

Local, element-specific and time-resolved dissolution processes on a Mg–Y–RE alloy – Influence of inorganic species and buffering systems

Christian Ludwig, Noémie Elise Ott

The effect of body fluids inorganic species on element-specific dissolution of a Mg-Y-Rare earth elements (RE) alloy was investigated by flow microcapillary plasma mass spectrometry. A new important aspect of this method is the online monitoring of precipi ...

2013

Insights about inductively coupled plasma optical emission spectroscopy interferences of major rare earth elements in complex e-waste feeds

Christian Ludwig, Rudolf Paul Wilhelm Jozef Struis, Ajay Bhagwan Patil

The advent of rare earth elements (REEs) with optoelectronic properties has shifted the technology paradigm from digital to a smart and hybrid world. Their substantial uses also resulted in a large piling up of e-waste. Therefore, e-waste is now a lucrativ ...

2022

Continuous Production of Tailored Silver Nanoparticles by Polyol Synthesis and Reaction Yield Measured by X-ray Absorption Spectroscopy: Toward a Growth Mechanism

Christian Ludwig, Heinrich Hofmann, Paul Bowen, Frank Nüesch, Andrea Testino, Jose Enrico Quijano Quinsaat

Two complementary topics are discussed: (i) the continuous production of silver nanoparticles (AgNPs) and (ii) the measurement of reaction yield by X-ray absorption near-edge spectroscopy (XANES). The continuous polyol synthesis of AgNPs in grams amount an ...

Amer Chemical Soc2014

Aerosol-into-liquid capture and detection of atmospheric soluble metals across the gas–liquid interface using Janus-membrane electrodes

Jian Wang, Christian Ludwig, Tianyu Cen, Min Gao

The soluble fraction of atmospheric transition metals is particularly associated with health effects such as reactive oxygen species compared to total metals. However, direct measurements of the soluble fraction are restricted to sampling and detection uni ...

2023

Airborne metal nanoparticles released by azides detonation: determination and potential public exposure

Christian Ludwig, Andrea Testino, Tianyu Cen, Laura Torrent Fabrega

Metal azides are highly energetic materials that release a large amount of gas upon detonation. They also release metal particles, generating an aerosol. The most common azide is sodium azide (NaN3), which is used nowadays in car airbags. If the decomposit ...

Springer Nature2024

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

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

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

Redox dynamics of sulphur with Ni/GDC anode during SOFC operation at mid- and low-range temperatures: An operando S K-edge XANES study

Christian Ludwig, Rudolf Paul Wilhelm Jozef Struis

Sulphur poisoning of nickel-based solid oxide fuel cell (SOFC) anode catalysts is a well-documented shortcoming, but not yet fully understood. Here, a novel experiment is demonstrated to obtain spectroscopic information at operando conditions, in particula ...

Elsevier2013

Adsorption of thiophene by activated carbon: A global sensitivity analysis

Christian Ludwig

The removal of sulfur compounds in biomass gasification processes is crucial to protect downstream equipment. While conventional sorbent materials can retain H2S, many fail to capture heterocyclic sulfur compounds such as thiophene (C4H4S). This work explo ...

Elsevier Sci Ltd2017

Thermophilic cyanobacteria Leptolyngbya sp

Christian Ludwig

Leptolyngbya sp. INSTML01 16S ribosomal RNA gene, partial sequence GenBank: MG753795.1 ...

2018

Special Issue about Natural Resources - Part II

Christian Ludwig

Elsevier2014