Matthias Rädle

Matthias Rädle
Hochschule Mannheim · CeMOS, Center for Mass Spectrometry and Optical Spectroscopy

Prof.Dr.

About

215
Publications
33,366
Reads
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1,565
Citations
Introduction
Matthias Rädle is head of the Institute for Process Control and Innovative Energy Conversion (PI), head of KVE ( ) and Co-Head of the Science Center CeMOS (Center for Mass Spectrometry and Optical Spectroscopy) with actually 70 scientists and a 4 Mill. € third party funding per year. Matthias does research in instrumentation development, Optics, Spectrometry, Process Control, Digitalisation, Material Science, Medical Technology, Energy Conversion, heat storage and superisolation.
Additional affiliations
December 2000 - present
Hochschule Mannheim
Position
  • head of Institute
September 1988 - March 2000
BASF
Position
  • Group Leader
Description
  • Development of process control technique Fertilizer development
October 1984 - September 2000
Technische Universität Kaiserslautern
Position
  • Researcher
Education
September 1978 - August 1988

Publications

Publications (215)
Article
Full-text available
Double emulsions show great potential for encapsulating active substances and protecting them against external influences. However, they tend to become unstable during storage. Research on double emulsions, therefore, focuses on maintaining their microstructure during their shelf life. Optical measurement methods, such as Raman spectroscopy, have h...
Article
Full-text available
Quality control and reaction monitoring are necessary to ensure the consistency of any kind of mixing or reaction process. In this context, a novel portable high-sensitivity sensor prototype based on the Raman effect is presented in this study. The elongated probe head is designed for (but not limited to) monitoring high temperature batch processes...
Article
Full-text available
The specific surface area of the dispersed phase in suspensions, emulsions, bubble columns and aerosols plays a decisive role in the increasement of heat and mass transfer processes. This has a direct effect on the space‐time yield in large‐scale chemical/process engineering production plants. Initial investigations show that an easy‐to‐install opt...
Article
Full-text available
Vacuum insulation panels (VIP) are usually manufactured using standardized manufacturing processes based on empirical values and in most cases with any fumed silica as the main component of the core material. However, not all applications have the same requirements in terms of thermal conductivity and service life. Therefore, it is useful to adapt...
Article
Über neue Techniken in der Elementanalytik, neue Isotope für die Spurensuche in der forensischen Umweltanalytik und in der Archäometrie, Miniaturisierung in Chromatographie und Elektroanalytik, Biosensoren für die Point‐of‐Care‐Diagnostik, spektroskopische Methoden in der Prozessanalytik, Digitalisierung und Analyse von Kunststoffen in der chemisch...
Article
Full-text available
Technical liquid flow films are the basic arrangement for gas fluid transitions of all kinds and are the basis of many chemical processes, such as columns, evaporators, dryers, and different other kinds of fluid/fluid separation units. This publication presents a new method for molecule sensitive, non-contact, and marker-free localized concentratio...
Article
Full-text available
If the effective thermal conductivity of a silica powder in any gas atmosphere is to be calculated analytically, one is faced with a whole series of decisions. There are a lot of different models for the gas thermal conductivity in the pores, the thermal accommodation coefficient or the effective thermal conductivity itself in the literature. Furth...
Article
Full-text available
Physical distancing and wearing a face mask are key interventions to prevent COVID-19. While this remains difficult to practice for millions of firefighters in fire engines responding to emergencies, the delayed forthcoming of evidence on the effectiveness of such safety interventions in this setting presents a major problem. In this field experime...
Data
This laboratory report sheds light on partial aspects of testing whether and when the correlation CO2 to liquid aerosols holds up in real-world applications. In the here presented test example a cloud of vapor is generated in an enclosed room using an electronic cigarette. Devices from the NX3 series of ProxiCube® are installed at four different po...
Technical Report
Full-text available
Dieser Laborbericht beleuchtet Teilaspekte der Prüfung, ob und wann die Korrelation CO2 zu Flüssig-Aerosolen im Realbetrieb Bestand hat. In einem abgeschlossenen Raum wird eine Dampfwolke mittels einer elektronischen Zigarette erzeugt. An vier unterschiedlichen Stellen des Raumes werden Geräte der NX3-Serie von ProxiCube® angebracht, die über die V...
Technical Report
Full-text available
This laboratory report sheds light on partial aspects of testing whether and when the correlation CO2 to liquid aerosols holds up in real-world applications. In the here presented test example a cloud of vapor is generated in an enclosed room using an electronic cigarette. Devices from the NX3 series of ProxiCube® are installed at four different po...
Poster
Full-text available
A central electronic is developped to transport any kind of information from PAT-sensors wireless to a receiver.
Poster
Full-text available
Optical quality control is becoming increasingly significant in process metrology. In some cases, quality control requires a non-contact, non-destructive measurement method that is capable of inspecting structures within the sample at defined penetration depths. In this study, we present an optical measurement system that utilizes laser-based spect...
Poster
Full-text available
In research, development, quality control and product approval, information on the number of particles per size class is increasingly required in addition to particle size classification. This is, for example, an essential experimental prerequisite for the implementation of "Regulatory Aspects ot Nanomaterials in the EU". So far, there are only 3 t...
Poster
Full-text available
The investigation and evaluation of mixing- and diffusion-limiting processes in microchannel form an essential basis for a better understanding in such reactors and thus for the optimization of reactor geometries. The requirements for a measurement system to represent these processes as accurately as possible are thus multifaceted. It is important...
Presentation
Full-text available
In many chemical/pharmaceutical processes, the technically viable efficiencies and throughputs have not been achieved yet because of the reduction in heat transfer (e.g., in heat transfer units, reactors, etc.) due to the formation of wall deposits. Considerable amounts of energy can be saved by reducing or entirely preventing this problematic area...
Article
Full-text available
Aerosols contain liquid and/or solid particles, which can pose a significant risk to humans. In order to detect these potential hazards at an early stage, this paper shows the possibility of measuring aerosols with an adapted particle sensor system (ProxiCube®) and displaying the liquid and solid components separately. To demonstrate the reproducib...
Presentation
Full-text available
Das Rösten von Malz oder Gerste ist ein entscheidender Schritt der Röst-, Karamell- und Malzherstellung und bestimmt die physikalischen, strukturellen und chemischen Eigenschaften. In der vorliegenden Arbeit wurde die chemische Zusammensetzung von Malz während des Röstens mithilfe der Diffusreflexions-Mittelinfrarot-Fourier-Transformations-Spektros...
Article
Full-text available
The work presents an efficient and non-invasive method to visualize the local concentration and viscosity distribution of two miscible and non-reacting substances with a significant viscosity difference in a microchannel with a Y-shape cell. The proof-of-concept setup consists of a near-infrared (NIR) camera and cost-effective dome lighting with NI...
Article
Full-text available
In the presented investigation, the chemical composition of malt during roasting is estimated using diffuse reflectance mid-infrared fourier transform (DRIFT-MIR) spectroscopy and multiple linear regressions. Accordingly, the corresponding test setup is presented and evaluated. A total number of sixty-five stop roasting, having temperature range fr...
Article
Full-text available
Frozen section analysis is a frequently used method for examination of tissue samples, especially for tumour detection. In the majority of cases, the aim is to identify characteristic tissue morphologies or tumour margins. Depending on the type of tissue, a high number of misdiagnoses are associated with this process. In this work, a fast spectrosc...
Article
Full-text available
Multimodal imaging gains increasing popularity for biomedical applications. This article presents the design of a novel multimodal imaging system. The centerpiece is a light microscope operating in the incident and transmitted light mode. Additionally, Raman spectroscopy and VIS/NIR reflectance spectroscopy are adapted. The proof-of-concept is real...
Preprint
Full-text available
Physical distancing and wearing a face mask are key interventions to prevent COVID-19. While this remains difficult to practice for millions of firefighters in fire engines responding to emergencies, the delayed forthcoming of evidence on the physical effectiveness of such safety interventions in this setting presents a major problem. In this field...
Article
Full-text available
To meet the demands of the chemical and pharmaceutical process industry for a combination of high measurement accuracy, product selectivity, and low cost of ownership, the existing measurement and evaluation methods have to be further developed. This paper demonstrates the attempt to combine future Raman photometers with promising evaluation method...
Poster
Full-text available
Ziel: Entwicklung und Aufbau einer ATR-Sonde zur Belagerkennung und Quantifizierung von Polymerisationsreaktionen abhängig von der Reaktionszeit und den Umgebungsbedingungen im Reaktor • Design stützt sich auf theoretische Berechnung, optisches Raytracing und Photonenflussanalyse • Sensoren basieren auf Glasfasertechnologie • Anwendung der Abgeschw...
Book
Full-text available
Die Versorgung mit Strom, Wärme und Kraftstoffen wird zukünftig dezentral, erneuerbar und sektorübergreifend sein. Sie muss möglichst effizient und kostengünstig erfolgen. Wie Städte und urbane Ballungsräume die Energiewende nach diesen Maßgaben erfolgreich umsetzen können, haben neben der Hochschule Mannheim sieben Hochschulen für angewandte Wisse...
Article
Full-text available
This work presents a novel method for the non-invasive, in-line monitoring of mixing processes in microchannels using the Raman photometric technique. The measuring set-up distinguishes itself from other works in this field by utilizing recent state-of-the-art customized photon multiplier (CPM) detectors, bypassing the use of a spectrometer. This a...
Article
Full-text available
Learning content in mathematics, such as vector geometry, is still predominantly taught in an abstract manner, as the visualization and interaction of three-dimensional problems are limited with classical forms of teaching such as blackboard lessons or exercise sheets. This research article proposes the use of augmented reality (AR) in mathematics...
Poster
Full-text available
Die kontinuierliche Überwachung der Größenverteilung von Schüttgütern stellt nach wie vor eine große Herausforderung dar. Bisher verfügbare Messsysteme zur kontinuierlichen Messung benötigen in der Regel ein aufwendiges Probenahmesystem. Mit dem hier gezeigten Inline-Partikelgrößenmessgerät „DYNAsize“, dass in Zusammenarbeit mit dem CeMOS entwickel...
Poster
Full-text available
Entwicklung und Aufbau optischer Sensoren und photometrischer Messsysteme zur Belagerkennung und Quantifizierung zeitabhängiger Polymerisationsreaktionen abhängig von deren Umgebungsbedingungen
Article
Full-text available
The industrial particle sensor market lacks simple, easy to use, low cost yet robust, safe and fast response solutions. Towards development of such a sensor, for in-line use in micro channels under continuous flow conditions, this work introduces static light scattering (SLS) determination of particle diameter using a laser with an emission power o...
Article
Best practice energy efficiency goals (EU 2030 climate & energy framework [1]) require substantial improvements in thermal insulation. Vacuum Insulation Panels (VIPs) offer considerable advantages over traditional insulation materials in terms of thermal insulation performance, with effective thermal conductivities between 0.004 and 0.008 W/(mK) [2...
Article
Full-text available
Investigating switchable vacuum insulation panels might lead to a new type of insulation, which can be switched on to enable a low heat flow when a good insulation effect is desired and switched off when exchange with the environment is requested, during a cold summer night, for example. For this reason, different core materials for vacuum insulati...
Article
Good water treatment is a guarantee for good beer. Using green, resource-efficient technologies without addition of chemicals and without waste, it is possible to produce beer while simultaneously having a positive effect on the environment. Frezze crystallisation offers this excat combination for environmentally conscious beer producers.
Article
Full-text available
The design of a desalination plant is most important if the desired product purity has to be as high as possible. This is also true for freeze crystallization plants. A correct solid-to-liquid ratio has to be ensured when pressing is used as a post-treatment. Thus, the dependence of the overall plant design on the achieved ice quality but also on d...
Article
Full-text available
Modelling flow and mass transfer of thermal separation equipment constitutes one of the most challenging tasks in fluids process engineering. The difficulty of this task comes from the multiscale multiphase flow phenomena in rather complex geometries. Both analysis of flow and mass transfer on different scales as well as validation of models and si...
Article
Full-text available
de Der Einsatz von faseroptischen Rückstreusensoren zur Inline‐Überwachung der Partikelkonzentration in hochgefüllten Dispersionen und Lacksystemen wird dargestellt. Durch die Miniaturisierung des Abstandes zwischen Sender‐ und Empfängerfaser auf < 600 µm kann das eingetragene Licht auch hohe Dispersphasenanteile von bis zu 60 % durchdringen. Aufgr...
Article
Full-text available
The development of sustainable trucks has drawn a lot of attention lately. However, the reduction of fuel consumption and emissions related to deep frozen food transports has not yet been satisfactorily considered. In this paper, a thermal Large Eddy Lattice Boltzmann Method (LES-LBM) is applied to investigate two concepts for optimized refrigerate...
Article
Full-text available
The thermal properties of lightweight buildings can be efficiently improved by using phase change materials (PCMs). The heat storage capacity of the building can be extended exactly at the desired temperature level, which leads to an enormous increase in residential comfort. This is shown in the present paper using the example of a prefabricated wo...
Article
Full-text available
This paper provides an overview of how molecule-sensitive, spatially-resolved technologies can be applied for monitoring and measuring in microchannels. The principles of elastic light scattering, fluorescence, near-infrared, mid-infrared, and Raman imaging, as well as combination techniques, are briefly presented, and their advantages and disadvan...
Article
Full-text available
Thermal storage systems are an essential component for increasing the share of renewable energies in residential heating and for the valorization of waste heat. A key challenge for the widespread application of thermal storage systems is their limited power-to-capacity ratio. One potential solution for this challenge is represented by direct-contac...
Research Proposal
Full-text available
Digitisation of chemical production processes - opportunities and challenges for metrology and sensor technology The chemical industry is currently facing the challenges of digitalising production. It is the key to making processes and plants more flexible, shortening time-to-market and tailoring production to changing demand and shorter product l...
Article
Full-text available
The study presents a latent heat storage system consisting of a phase change material (PCM) and a heat transfer fluid (HTF), placed in direct contact, for storing thermal energy derived from renewable energy sources or industrial waste heat. It is important that the two media are immiscible for the function of such a storage system. In this study t...
Article
Full-text available
The thermal accommodation coefficient is a measure for the quality of thermal energy exchange between gas molecules and a solid surface. It is an important parameter to describe heat flow in rarefied gases, for example, in aerospace or vacuum technology. As special application, it plays a decisive role for the thermal transport theory in silica fil...
Article
Full-text available
In this study, we present an efficient and innovative method to visualize absorption differences in the mid-infrared range with spatial resolution using laser technology. We focus on only two lasers with wavelengths between 3.4 μm and 3.6 μm and a spatial resolution of 20 μm and thus achieve a scanning speed up to 300 kS/s for fast image generation...
Article
Zur Bauschadensanalyse von Gebäuden wurde ein bildanalytisches Messverfahren entwickelt, das sich der Nah- und Mittelinfrarottechnik bedient. Der entwickelte Messaufbau wird beschrieben und dessen Funktionalität an zwei realen Schadensfällen aufgezeigt. https://www.derbausv.de/zeitschrift/aktuelle-ausgabe/optisches-messverfahren-zur-exakten-Lokali...
Article
Full-text available
Um die Effizienzsteigerung von n‐Octan gegenüber Wasser als Treibmedium in Dampfstrahlkälteanlagen zu ermitteln, wurde eine Versuchsanlage mit einer Kühlleistung von bis zu 1,5 kW aufgebaut. Als Saugmedium, sprich als Kältemedium, wurde in beiden Fällen Wasser verwendet. Aus den Druck‐ und Temperaturmessdaten konnten die beiden Massenströme, der so...
Article
Klarer Genuss | Wer genießt nicht gerne ein klares, kühles Bier? Damit sich jeder auch weiterhin einfach dem Genuss widmen kann, verfolgen die Autoren den Ansatz der Überwachung und Qualitätskontrolle in der Bierproduktion auf Basis optischer Streumethoden. Ziel ist die Entwicklung eines einfachen und flexiblen Messgerätes zur Inline-Überwachung. D...
Article
Full-text available
In the process engineering sub-steps of beer production, turbidity formation occurs during the brewing process. There may be several reasons for this, such as the precipitation of dissolved substances during the brewing process. However, it can also be caused by equipment malfunctions, for example malfunctions in filtration. This review examines wh...
Article
Full-text available
Raman and mid-infrared (MIR) spectroscopy are useful tools for the specific detection of molecules, since both methods are based on the excitation of fundamental vibration modes. In this study, Raman and MIR spectroscopy were applied simultaneously during aerobic yeast fermentations of Saccharomyces cerevisiae. Based on the recorded Raman intensiti...
Article
de Für die Evaluierung von Mischungsvorgängen in Mikroreaktoren ist es notwendig, diese genauer untersuchen zu können. Dazu wird ein neuartiges, optisches Messsystem vorgestellt, das die Visualisierung von mischungs‐ und diffusionslimitierten Vorgängen sowie Konzentrationsunterschieden in Fluidfilmen ermöglicht. Es besteht aus einer fokussierenden...
Article
Freeze desalination as a sustainable concept to produce potable water can be a useful and an additional method to overcome the water crisis, especially with ongoing global warming in focus. Therefore, a scraped surface crystallizer in combination with a post-treatment pressing cone has been built on a laboratory scale to investigate any dependencie...
Article
Full-text available
Optical systems applied for tissue analysis are primarily based on single spectroscopic techniques. This paper however presents a multispectral backscattering sensor designed for in- vivo application by a specially formed probe tip which allows side by side monitoring of ultraviolet (UV), visible (VIS), near infrared (NIR) and fluorescence (FL) s...
Article
In this study, we performed a multi-scale characterization of precipitated silica including small-angle X-ray scattering (SAXS), analytical (ultra-) centrifugation as well as electron microscopy and pore size determination techniques. Information about the primary particles and their size distribution within the aggregate, the aggregate size and it...
Presentation
Thermal energy storage is gaining importance within the framework of energy transition in both heating and cooling applications. To ensure efficiency of the storage system, heat losses need to be reduced with the aid of thermal insulation materials. Conventional insulation materials such as foams or fibers require substantial space. On the other ha...
Presentation
Full-text available
In this presentation we demonstrated a measurement procedure for the detection of lipid-based substances. The preparation of the scan results was also part of the lecture.
Article
de Zum Inline‐Monitoring der Schichtdickenverteilung in Fluidfilmen aller Art wurde ein bildanalytisches Verfahren entwickelt, das den Einsatz von gepulst betriebenen Nahinfrarot‐LEDs zur Beleuchtung nutzt. In Kombination mit einer NIR‐Kamera wurde die Möglichkeit eröffnet, bewegte Flüssigkeitsfilme zu überwachen. Im Rahmen des Beitrags werden die...
Article
The influence of a single microstructure on liquid-side controlled mass transfer is studied for liquid film flow over an inclined plate with a film height of less than 1 mm. Planar Laser Induced Fluorescence (PLIF) is adapted and used to measure oxygen absorption at three gas flow rates. The liquid is a mixture of water, ethanol and glycerol. A rut...