Chemie Ingenieur Technik最新文献

The aim of this study is to improve the inline monitoring of wastewater. Two probes, a resonator chamber constructed from aluminum and a 3D-printed hollow sphere crafted from steel with gold coating, are evaluated in comparison with a commercially available probe (Kaiser NCO10.5-VE). The impact on the sensitivity of the probes is illustrated in the Raman spectra. Furthermore, relevant analytes were measured in order to investigate the sensitivity in the ppm range. The effect on the Raman scattering with regard to the cross-sensitivity of the substances to each other and the turbidity of the sample was also investigated. With the help of simple and robust correction methods, the actual substance concentration of the respective analyte can be determined from a Raman measurement.

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Die Gesellschaft Deutscher Chemiker (GDCh) würdigte auch in diesem Frühjahr wieder herausragende Wissenschaftlerinnen und Wissenschaftler für ihre besonderen Verdienste um die Chemie. Die Preisverleihungen fanden unter anderem im Rahmen der ANAKON 2025 in Leipzig und der Chemiedozententagung (CDT) 2025 in Braunschweig statt.

Kathrin Breuker schloss 1994 ihr Studium der Physik an der Universität Münster mit dem Diplom ab. Anschließend wechselte sie an die Eidgenössische Technische Hochschule Zürich, Schweiz, wo sie 1999 promovierte. Nach Postdoc-Aufenthalten an der Cornell University, Ithaca, USA, und in Innsbruck, Österreich, begann sie 2002 zunächst als Arbeitsgruppenleiterin an der Universität Innsbruck. Nach dem Erlangen ihrer Venia Docendi in Biophysikalischer Chemie war sie dort ab 2014 als Assistenzprofessorin tätig. Seit 2019 ist Breuker Associate Professor am Institut für Organische Chemie der Universität Innsbruck. Ihre Forschung wurde bereits mehrfach ausgezeichnet und gefördert.

Karl Arnold Reuter, 1955 geboren, studierte Chemie an der Justus-Liebig-Universität Gießen, an der er 1985 auch promovierte. Nach einem Postdoc-Aufenthalt an der University of Utah, Salt Lake City, USA, begann er seine Industriekarriere bei BENCKISER sowie bei Sandoz Agro, in Basel, Schweiz, und in St. Pierre La Garenne, Frankreich. 1993 gründete er seine Firma Reuter Chemische Apparatebau in Freiburg. Er entwickelt neuartige Trennverfahren zur Racematspaltung und zur Aufreinigung organischer Substanzgemische und beschäftigt rund 90 Mitarbeitende.

Christoph Kerzig, geboren 1987, studierte Chemie an der Martin-Luther-Universität Halle-Wittenberg (MLU). Im Jahr 2017 schloss er ebenda seine Promotion mit summa cum laude ab. Nach Postdoc-Aufenthalten in Halle Wittenberg, der Universität Göteborg, Schweden und der Universität Basel, Schweiz, wechselte er 2020 als Junior-Professor an die Johannes Gutenberg-Universität Mainz. Seit 2024 ist er dort Professor für Anorganische Chemie und Photochemie. Für seine Forschung erhielt er bereits zahlreiche Auszeichnungen, darunter einen der ADUC-Preise im Jahr 2023.

The optimization of the homogeneously catalyzed biphasic hydroformylation has attracted considerable interest due to its potential to enhance chemical efficiency and product yields. In the past, evaluations of such processes primarily focused on conversion rates and selectivity with limited insights into the underlying interfacial phenomena. However, recent advances in analytical techniques like the implementation of high-pressure borescopy enabled a more comprehensive examination of these systems. This photo-optical approach allows for a precise in-situ visualization of the droplet size distribution in the reaction mixture and a calculation of the liquid-liquid interface, offering critical insights into the impact of the interfacial area on overall reaction efficiency. This review summarizes key optimization strategies while highlighting how this innovative measurement method can extend our understanding beyond conventional metrics in the multiphase hydroformylation.

A two-stage microreactor for kinetic parameter determination is investigated, with reaction progress monitored via NIR between stages and GC at the outlet. The system integrates an integral and a differential reactor to ensure well-defined conditions. Mass and heat transport analysis confirms ideal reactor behavior. This enables kinetic data determination for the acid-catalyzed esterification of acetic acid with methanol, showing consistency across reactor sections and alignment with literature values. Due to excellent heat transfer and reactor validity, the runaway-prone reaction between acetic anhydride and methanol is also studied, demonstrating strong agreement with literature data.

In the Power-to-X concept, wall-cooled fixed-bed tubular reactors will take on a central role in carrying out exothermic, heterogeneously catalyzed reactions. In order to achieve high product yields without overheating the reactors, effective heat management is required, especially for load-flexible operation. One solution for this is the use of core-shell catalyst pellets. In core-shell catalyst pellets, the catalytically active material is separated from the gas bulk by an inert shell (e.g. ‘egg white’ or ‘egg yolk’ pellets). The advantages and disadvantages of this concept are discussed in this article on the basis of analytical equations as well as experimental results on the laboratory and pilot scales, and compared with other concepts.

The advances in density functional theory (DFT) made it possible to calculate the vibrational frequencies and peak intensities of adsorbates on extended heterogeneous catalyst surfaces. However, the peak broadening that naturally appears in experimental infrared spectra due to physical effects and instrumental limitations is usually not part of the quantum mechanical modeling method. Here, a new user-friendly application, CaRIn (Catalysis Research with Infrared Spectroscopy), within the CaRMeN platform is proposed, in which the peak width can be approximated by means of Gaussian functions. The peak broadening can be adjusted in real time and compared to both experimental and other simulated spectra. The application integrates functionality for better visual comparability of different spectra and a database of spectra to enhance workflow efficiency.

The Nachwuchs Reaktionstechnik (NaWuReT) is an organization of early-career chemical engineers in the DECHEMA/VDI subject division Reaction Engineering. In the spring of 2024, the annual colloquium was held as a series of online lectures featuring five distinguished late-career academics and experts from industry. The speakers shared insights into how they transformed their efforts and ideas into successful careers in academia and industry. Additionally, they provided valuable recommendations for early-career chemical engineers, offering a critical resource for professional development in the field.