Riedl, Wolfgang

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Riedl
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Wolfgang
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Riedl, Wolfgang

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2021 - 20243
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  • Vorschaubild
    Publikation
    An “Agile” project planning course. Learning by doing in process engineering education
    (Elsevier, 07/2024) Riedl, Wolfgang [in: Education for Chemical Engineers]
    Process engineering education requires a comprehensive foundation and practical application. To bridge the gap between theoretical education and market requirements, a "Project Planning Course” has been offered since 2018 as part of the MSc specialization in Chemical Engineering at the FHNW School of Life Sciences. The course didactics combines the principles of an “agile” teaching mindset and problem-based learning, which optimally support the experience of this module. Students had to work on unresolved real-world problems, make decisions based on incomplete information, and present their work in a board meeting role play with board members from industry. These situations represent typical real-world challenges for future chemical engineers. The results show that most of the students learned to cope with the unconventional teaching methodology. The students’ evaluations of the module have been very positive, especially the fact that the active participation of the students triggers the actual learning process - which means that the essential learning goal has been achieved.
    01A - Beitrag in wissenschaftlicher Zeitschrift
  • Vorschaubild
    Publikation
    Membrane-supported liquid-liquid extraction. Where do we stand today?
    (Wiley, 02/2021) Riedl, Wolfgang [in: ChemBioEng Reviews]
    Thanks to advances in materials science and manufacturing technology, membranes are now available for stable liquid-liquid extraction processes. Rigorous calculation models can be used to calculate the membrane areas required for a specific separation task as well as to optimize the module design. Rapid tests can determine the basic suitability and kinetic parameters. Thus, the general requirements for exploiting the specific advantages of this separation technology in technical applications are fulfilled.
    01A - Beitrag in wissenschaftlicher Zeitschrift
  • Vorschaubild
    Publikation
    Mass transfer analysis and kinetic modeling for process design of countercurrent membrane supported reactive extraction of carboxylic acids
    (Elsevier, 2021) Riedl, Wolfgang [in: Chemical Engineering Science: X]
    Countercurrent membrane supported reactive extraction (MSRE) was studied for removal of carboxylic acids from aqueous streams with a PTFE capillary membrane. Analysis of the mass transfer rates was per- formed to support modeling of the process. Total mass transfer coefficients ranging from 2.0 10-7 to 4.0 10-7 m/s were obtained when extracting lactic acid with 20 wt% tri-N-octyl amine in 1-decanol with membrane thicknesses of 260 mm and 80 mm. The limiting mass transfer resistance in all experiments was in the membrane phase. The developed model based on mass transfer and reaction in parallel allows to predict countercurrent extraction. Experimental validation with 5, 7 and 12 m long membrane modules showed excellent accordance for two acids, validating the model simulations. Simulated membrane con- tactor lengths required for single, two and three countercurrent stages varied between 10 and 39 m/stage for lactic, mandelic, succinic, itaconic and citric acid, depending on acid, membrane, and diluent.
    01A - Beitrag in wissenschaftlicher Zeitschrift