Im Bereich der Destillation lassen sich nach der ACHEMA 2022 drei Faktoren zusammenfassen, in denen Neu- und Weiterentwicklungen vorangetrieben wurden. Zum einen wird weiterhin die Effizienzerhöhung bezüglich den Einbauten fokussiert und zum anderen wird die Energieeinsparung und die Erweiterung des Einsatzgebietes thematisiert.

The processing of a styrene recyclate stream and its reintegration into a polystyrene synthesis is accompanied by a significantly reduced energy input compared to conventional polystyrene synthesis. The chemical recycling of polystyrene waste thus shows great potential for use in circular plastics production.

Results from an experimental characterization of an additively manufactured packing and a comprehensive comparison with a conventionally manufactured counterpart are presented. For this purpose, fluid dynamic parameters, namely specific pressure drop and liquid holdup, as well as mass transfer efficiency were assessed in a lab-scale experimental setup.

Due to their impact on heat and mass transfer performance, knowledge of the flow patterns of gas-liquid flow through channels plays an important role in process design. The flow behavior in a milli-structured channel, observed by a camera system, was depicted in flow pattern maps. The influence of the surface tension and viscosity on the flow patterns is discussed.

Regression models for the prediction of bubble sizes based on wire-mesh sensor measurements are derived using supervised learning techniques. Basic methodology regarding data preparation, feature extraction and hyperparameter tuning is discussed. The obtained models allow for a largely increased bubble diameter prediction accuracy.

An innovative wetted-wall column for flexible small-scale distillation of specialty chemicals is introduced. Its performance is analyzed by a numerical method. The influence of the inclination angle of the falling film on pressure drop and separation efficiency is evaluated. The potential of the wetted-wall column concerning separation efficiency and flexibility is numerically evaluated.

In einer kleinskaligen Messzelle, die als Auslegungswerkzeug für Packungskolonnen entwickelt wurde, wird der Einfluss des Randbereichs und der Randabweiser auf die Fluiddynamik untersucht. Die Untersuchungen bilden einen weiteren Schritt in Bezug auf die Etablierung der Auslegungsmethode.

Im Rahmen dieses Beitrags werden experimentelle Untersuchungen zur Tropfenabscheidung im Einleitbereich eines Stoffaustauschapparates für zweiphasige Strömungen vorgestellt. Die Ergebnisse werden hinsichtlich ihrer Aussagekraft zur Vermeidung von Tropfenmitriss diskutiert und bewertet.

Component concentrations are important for the determination of mass transfer parameters for absorption and desorption in packed columns. In this work two methods are compared. These are a standard titration method and an infrared-based inorganic carbon analysis. The comparison is based on concentrations and HTU_OL experimental data.

To cope with current challenges, flexibility needs to be increased while maintaining intensive mass-, energy transfer, and resource-efficiency. Therefore, the innovative technologies must be characterized at an early stage of process development. Innovative technologies for liquid-liquid extraction are presented and their potentials are discussed.

This article provides an overview of the experimental investigation of an innovative sieve tray design enhancing the general capacity flexibility. In addition to the layout of the tray, a hydrodynamic characterization for determining the operation range is presented and an outlook to future investigations is given.

Enhancing flexibility of chemical processes is gaining increased attention recently. Here, relevant flexibility types are discussed, and flexibility needs are illustrated. Additionally, solutions and future challenges are classified across the length scales of chemical engineering, from catalyst design to plant operation.

A method, based on a bottleneck analysis, to evaluate capacity potentials in continuous processes is proposed. The method includes detailed steady-state simulations and is applied to the oxygen-based process for the production of ethylene oxide from ethylene. Results of the analysis can provide a basis to develop measures to enhance flexibility.

The usage of packed columns in small-scale production processes is limited due to their operating limits. Wetted-wall columns can be a suitable alternative, especially when low pressure-drops are important. The operating range of each column type is analyzed in this paper.

This study sets out to investigate the flexibility of a Power-to-Gas plant from a chemical engineering perspective. Model-based analyses reveal the operating windows of the individual technologies and of the combined process. Considerable flexibility is found in capacity as well as feedstock, however, carbon dioxide supply poses limits.

Analysis of flow and mass transfer in thermal separation systems requires advanced experimental and measurement techniques applicable at different scales, for different fluids and in complex geometries. In this article, a wide set of available modern experimental technologies is presented.

Für die Einhaltung von Klimaschutzzielen und die zunehmende Bedeutung von Circular Economy ist die chemische Industrie mit neuen Herausforderungen konfrontiert. Zur Lösung gibt es bereits innovative Ansätze aber auch zukünftige Handlungsfelder, die hier dargestellt und diskutiert werden.

Experten der ProcessNet-Fachgemeinschaft „Fluiddynamik und Trenntechnik” beschäftigten sich im 58. Tutzing-Symposion mit den Auswirkungen und Herausforderungen von Industrie 4.0 auf die Apparatesituation in fünf Themenclustern in Hinblick auf moderne Sensorik, Modellierung, Design, Betrieb und Ausbildung.

The efficiency of a distillation column is significantly affected by droplet entrainment which was investigated in the feed section of distillation columns for multiple feed inlet devices with different operation conditions. Detailed measurements with different two-phase flow regimes in the feed pipe were conducted. An innovative feed inlet device, named the demister flash box, was developed.