Stephan Scholl
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Comprehensive End-of-Life-Battery Composition Analysis from Module to Electrode Level to Assist More Efficient Recycling Open
With rising efforts to enable a circularity of valuable resources of lithium-ion batteries, a growing number of recycling companies in Europe are expanding their capacities and developing new recycling technologies. The European Union (EU)…
View article: Improved limit on the effective electron neutrino mass with the ECHo-1k experiment
Improved limit on the effective electron neutrino mass with the ECHo-1k experiment Open
The effective electron neutrino mass can be determined by analyzing the endpoint region of the $^{163}$Ho electron capture spectrum, provided a measurement with high energy resolution and high statistics using calorimetric techniques. Here…
Investigation of fouling roughness induced heat transfer improvement using a stereoscopic micro PIV Open
This study examines the relationship between surface roughness caused by crystal fouling layers and heat transfer in a controlled flow environment. Heat exchanger fouling is a persistent challenge in industrial processes that significantly…
View article: Differences in emulsion polymerization fouling between acrylates and vinyl acetate studied in-situ with a quartz crystal microbalance (QCM)
Differences in emulsion polymerization fouling between acrylates and vinyl acetate studied in-situ with a quartz crystal microbalance (QCM) Open
Fouling is a severe problem in emulsion polymerization, which – among other consequences – currently prevents polymerization in continuous flow reactors. Measuring the early stages of fouling (< 10 μm) can be challenging due to the low sen…
Use of a scattered light sensor for monitoring the dispersed surface in multimodal system Open
The article presented here deals with the quality parameter dispersed surface in material systems like suspensions or dispersions in which several phases are present simultaneously such as solids in continuous solution. Here, other quality…
Investigation of blocking phenomena in cleaning of micro heat exchangers Open
Micro heat exchangers enhance heat and mass transfer compared to conventional heat exchangers which promotes an increased energy efficient application in many industries. Despite these advantages, micro structured components in general are…
A movable heated finger design for the monitoring of fouling during polymer synthesis Open
The production of a latex dispersion by emulsion polymerization results in particle and reaction fouling of heat exchange surfaces. Fouling during emulsion polymerization deteriorates heat transfer efficiency, prevents continuous reactor c…
View article: Fouling in Emulsion Polymerization: Fundamentals and Methods of Investigation
Fouling in Emulsion Polymerization: Fundamentals and Methods of Investigation Open
The current understanding of fouling in emulsion polymerization is summarized from an engineering perspective and from a physical‐chemistry perspective. Emulsion polymerization in semibatch mode offers better control over the number of par…
Analyzing Organic Electrolyte Solvents from Spent Lithium-Ion Batteries as a Basis for Distillative Value Component Recovery Open
The rapid expansion of lithium-ion batteries (LIBs), largely driven by the rising demand for electric vehicles, will lead to a significant increase in end-of-life (EOL) batteries, necessitating efficient recycling processes, which must be …
Precipitation of terephthalic acid from post-consumer polyethylene terephthalate waste fractions Open
Achieving circularity for post-consumer polymers requires to address and overcome significant challenges and limitations such as the efficient removal of additives, colourants, contamination from usage and undesired chain scission. A very …
Comparison of Various Methods and Detectors to Determine Isotherms Using Self‐Packed Columns Open
The study aims to determine adsorption isotherms through dynamic methods, including elution by characteristic point (ECP) and frontal analysis (FA), using a model system of beta zeolite and an aqueous sorbitol solution. The investigation s…
Evaporation of Binary Mixtures in a Pillow Plate Thermosiphon Reboiler Open
Pillow plate heat exchangers show promising performance in extending the operating range of thermosiphon reboilers. Here, the evaporation of binary mixtures during natural circulation evaporation in a pillow plate apparatus was investigate…
Stereoscopic Micro-PIV measurement of the flow dynamics in a spherical dimple Open
One way to increase the thermal efficiency of heat exchangers is to structure the heat transfer surfaces with dimples, resulting in an enlarged surface area and intensified turbulence in the fluid flow. The increased turbulence also causes…
A Screening Apparatus for Comparing the Fouling Resistance of Heat Exchanger Surfaces Open
Fouling is a challenge in many processes, especially in heat exchangers and evaporators. Even though many treatments have been developed to mitigate fouling on metallic surfaces, no standardized method exists to compare equipment based on …
Applicability of a Spinning Disk Apparatus for the Investigation of Particulate Fouling Open
The applicability of a fluidically heated spinning disk apparatus (SDA) was tested for investigating the influence of the tangential velocity on the deposition of particulate material systems, in particular on latex particles. First, the S…
An Experimental Approach to Overcome the Fouling Issue in Micro Heat Exchangers Open
Micro heat exchangers improve heat and mass transfer compared to conventional heat exchangers, enabling more energy‐efficient applications. However, their sensitivity to fouling limits broader industrial application. This approach presents…
Comparing Calcium Sulfate Fouling on Polymeric and Metal Heat Transfer Surfaces Open
Fouling mitigation provides many challenges in process equipment, especially in heat exchangers. In this work, the fouling behaviors of two polymers are compared to 1.4301 stainless steel (SS) in calcium sulfate solutions. An experimental …
View article: Fluorophore-Labeled Pyrrolones Targeting the Intracellular Allosteric Binding Site of the Chemokine Receptor CCR1
Fluorophore-Labeled Pyrrolones Targeting the Intracellular Allosteric Binding Site of the Chemokine Receptor CCR1 Open
In this study, we describe the structure-based development of the first fluorescent ligands targeting the intracellular allosteric binding site (IABS) of the CC chemokine receptor type 1 (CCR1), a G protein-coupled receptor (GPCR) that has…
Depolymerization of PET Fibers from Textile Blends and Recovery of Terephthalic Acid Open
The hydrolytic depolymerization of poly(ethylene terephthalate) (PET) fibers with solid sodium hydroxide was investigated. The study presents an innovative recycling approach for the recovery of virgin‐quality terephthalic acid (TA) from t…