Fak. 3 Prozesswissenschaften

1265 Items

Recent Submissions
Comprehensive approach for evaluating different resource types – Case study of abiotic and biotic resource use assessment methodologies

Bach, Vanessa ; Berger, Markus ; Forin, Silvia ; Finkbeiner, Matthias (2018)

Due to steadily increasing resource demand and accompanying raising public awareness, a variety of assessment methodologies evaluating resource use and its consequences were published in the last years. Existing methodologies are typically developed considering the specific characteristics of one particular resource type and as consequence are not suitable for cross-cutting assessment of differ...

Product environmental footprint in policy and market decisions: Applicability and impact assessment

Lehmann, Annekatrin ; Bach, Vanessa ; Finkbeiner, Matthias (2015)

In April 2013, the European Commission published the Product and Organisation Environmental Footprint (PEF/OEF) methodology—a life cycle‐based multicriteria measure of the environmental performance of products, services, and organizations. With its approach of “comparability over flexibility,” the PEF/OEF methodology aims at harmonizing existing methods, while decreasing the flexibility provide...

Approach to qualify decision support maturity of new versus established impact assessment methods—demonstrated for the categories acidification and eutrophication

Bach, Vanessa ; Finkbeiner, Matthias (2016)

Purpose Initiatives like the EU Product Environmental Footprint have been pushing the discussion about the choice of life cycle impact assessment methods. Practitioners often prefer to use established methods for performance tracking, result stability, and consistency reasons. Method developers rather support newly developed methods. As case studies must provide consistent results in order to ...

Enhancing the assessment of critical resource use at the country level with the SCARCE method – Case study of Germany

Bach, Vanessa ; Finogenova, Natalia ; Berger, Markus ; Winter, Lisa ; Finkbeiner, Matthias (2017)

The demand for many resources has increased significantly over the last decades due to their growing importance for industrial and technological development. Thus, various methods were developed to assess availability constraints of resources in relation to their vulnerability within countries and/or sectors (criticality). However, these methods display several short-comings. Thus, the aim of t...

Integrated method to assess resource efficiency – ESSENZ

Bach, Vanessa ; Berger, Markus ; Henßler, Martin ; Kirchner, Martin ; Leiser, Stefan ; Mohr, Lisa ; Rother, Elmar ; Ruhland, Klaus ; Schneider, Laura ; Ladji, Tikana ; Volkhausen, Wolfgang ; Walachowicz, Frank ; Finkbeiner, Matthias (2016)

With increasing demand of abiotic resources also the pollution of natural resources like water and soil has risen in the last decades due to global industrial and technological development. Thus, enhancing resource efficiency is a key goal of national and international strategies. For a comprehensive assessment of all related impacts of resource extraction and use all three sustainability dimen...

Messdaten zum Honigmann-Prozess

Jahnke, Anna (2019-02-01)

Bei den beiliegenden Dateien handelt es sich um Messdaten zu Versuchen zum Honigmann-Prozess. Informationen zur Entstehung der Messwerte und deren Analyse finden sich in der dazugehörigen Dissertation "Untersuchung des Honigmann-Prozesses zur thermochemischen Energiespeicherung"

Untersuchung des Honigmann-Prozesses zur thermochemischen Energiespeicherung

Jahnke, Anna (2019)

Topic of this work is the evaluation of a thermochemical energy conversion and storage process. It can be loaded either with the input of heat or mechanical work. The stored energy can be retrieved in the form of heat, cold or mechanical work at a later point in time. The process was originally invented to drive a fireless locomotive and was patented at the end of the 19th century by Moritz Hon...

Evaluation and optimization of natural gas liquefaction process with exergy-based methods: a case study for C3MR

Primabudi, Eko (2019)

Propane pre-cooled mixed refrigerant process, known as C3MR, is the leading technology in the LNG market based on the capacity installed. In this study, exergy-based methods were implemented in order to obtain optimal operation conditions. The C3MR process is modeled with 4.5 MTPA production capacity using Aspen Plus process simulator, which is connected to the exergy and exergoeconomic analysi...

Formation, characterization and analysis of transformation products of food relevant mycotoxins

Keller, Julia (2019)

Besides mycotoxins found worldwide in food and feed, the occurrence of transformation products (TPs) of mycotoxins poses a further threat for food safety. Simulation methods of natural abiotic and biotic degradation processes leading to TPs have the advantage of being fast and easy. This work investigates the application of several simulation methods to mimic phase I biotransformation reactions...

Development of in situ methods for process monitoring and control and characterization of Cu-Zn-Sn-S based thin films

van Duren, Stephan (2019)

In recent years, kesterite Cu2ZnSnS4 (CZTS) has become an interesting alternative to copper indium gallium (di)selenide (CIGS) due to its non-toxic and earth abundant constituents. A variety of methods is being used to fabricate kesterite thin films, such as coevaporation, sputtering, electrodeposition, spray pyrolysis and others. Most of them include an annealing step to stimulate elemental mi...

Evaluation and improvement of energy management in industrial baking ovens

Jado, Ahmed Hamdy Kamel Abdelsalam (2019)

The final step in bread making is the baking process to produce the final attributes of product quality, including texture, color, and flavor, as a result of several thermal reactions. These thermal reactions are dominated by heat and mass transfer mechanisms inside an oven chamber as well as inside the dough pieces. This research involves studying existing methods of baking bread in a common ...

Emulating the early phases of human tooth development in vitro

Rosowski, Jennifer ; Bräunig, Julia ; Amler, Anna-Klara ; Strietzel, Frank P. ; Lauster, Roland ; Rosowski, Mark (2019-05-07)

Functional in vitro models emulating the physiological processes of human organ formation are invaluable for future research and the development of regenerative therapies. Here, a developmentally inspired approach is pursued to reproduce fundamental steps of human tooth organogenesis in vitro using human dental pulp cells. Similar to the in vivo situation of tooth initiating mesenchymal condens...

3-Iodothyronamine and its role in aminergic G-protein coupled receptor signaling and neuromodulation

Bräunig, Julia (2019)

3-Iodothyronamine (T1AM) is an endogenous thyroid hormone metabolite. Its profound pharmacological effects on energy metabolism and thermal homeostasis in rodents have raised interest to elucidate its signaling properties in tissues that pertain to metabolic regulation and thermogenesis. Especially its anapyrexic effect could be utilized in emergency medicine to treat disease conditions like st...

Investigations on zinc resorption using in vitro intestinal models

Maares, Maria Henrietta (2019)

The essential trace element zinc is mainly resorbed in the small intestine, where the luminal available cation is absorbed by enterocytes of the intestinal epithelium and transported into the blood circulation. In the past four decades substantial progress in the overall understanding of zinc homeostasis was made by elucidating that the intestinal zinc resorption regulates the systemic homeosta...

Model-based strategies for scale-down studies in fed-batch cultivation of Escherichia coli expressing proinsulin

Anane, Emmanuel (2019)

A fundamental discrepancy in process performance (yields) exists between laboratory and industrial scale fermentation processes. This discrepancy results from heterogeneous environments in large-scale bioreactors due to the longer mixing times associated with the increasing volumes at industrial scale, compared to laboratory scale bioreactors. The effects of such process inhomogeneity or the so...

Einfluss mikrobieller Prozesse auf die Fluidchemie und den Betrieb geothermischer Anlagen

Westphal, Anke (2019)

Eine geothermische Nutzung bewirkt Temperaturänderungen im Untergrund und in der geothermischen Anlage. Die Temperatur beeinflusst sowohl hydrogeochemische und physikalische Parameter als auch die Zusammensetzung der mikrobiellen Biozönose im Reservoir und Fluid. Neben chemischen Prozessen tragen auch mikrobiell katalysierte Stoffumsetzungen und die Biofilmbildung zu Korrosion, Clogging sowie M...

Systematische Analyse des Koaleszenzverhaltens von zweiphasigen Flüssigsystemen bei Ionenzugabe

Villwock, Jörn (2019)

Prozesse, in denen zwei nicht ineinander lösliche Flüssigkeiten verwendet werden, spielen eine wichtige Rolle in der industriellen Anwendung. Eine besonders wichtige die Prozesseffizienz bestimmende Größe ist dabei die Tropfengrößenverteilung, die sich aus den beiden simultan ablaufenden und sich überlagernden Phänomenen Tropfenbruch und -koaleszenz ergibt. Vor allem die Tropfenkoaleszenz ist a...

Photocatalysis and vacuum ultraviolet light photolysis as ethylene removal techniques for potential application in fruit storage

Pathak, Namrata (2019)

Most fresh fruit and vegetables are highly perishable in nature and contribute to the highest percentage of food loss in the world annually (45%). Ethylene removal has been identified as an important postharvest strategy to reduce fruit and vegetable losses. The gaseous phytohormone ethylene, which is involved in the control of plant development, is produced in varying quantities by fruit and v...

Merging science and art through fungi

Meyer, Vera (2019-04-26)

Science and art have long been studied interchangeably, with notable polymaths emerging in the Renaissance such as Leonardo da Vinci (artist, inventor, engineer and anatomist) and Alexander von Humboldt (explorer, geographer and naturalist) with his fellow investigators Johann Wolfgang von Goethe (scientist and writer) and Friedrich Schiller (philosopher, physician and historian). However, this...

Extension and improvement of the coupled CFD-DEM approach to describe multidimensional heat transfer and non-spherical particle shape for fluidized systems

Oschmann, Tobias Sebastian (2019)

The design and improvement of industrial applications involving granular materials in the field of energy and thermal process engineering is often based on the results of numerical simulations as the experimental determination of the key process parameters of interest is frequently hard to conduct due to limited accessibility of the processes. Most used numerical frameworks for granular materia...