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M. Sc. Alexander Kühl

Focus of work

  • Membrane Reactor & Organophilic Nanofiltration
  • Recycling of homogeneous catalyst
  • Continious/ Semi-batch Miniplants
  • Ethenolysis

Follow the link to moodle to get further information about current student research projects:

Further Information about Alexander Kühl

Curriculum Vitae

In October 2013, Alexander Kühl started studying Chemical Engineering at the Technische Universität Dortmund. In 2018, he finished his bachelor thesis with the topic “Investigation of the hydroaminomethylation of 1-Decene and determination of the influence of significant reaction parameters” at the laboratory of industrial chemistry. He continued his master studies at the TU Dortmund and successfully completed his master in 2021. His master thesis with the title “Reconstruction and Commissioning of a continuous miniplant for the application of thermomorphic multiphase systems in homogenous catalysis” was written at the laboratory of industrial chemistry. Following his master studies, he started his doctoral studies in March 2021. 

Research Topic

With decreasing numbers of oil deposits, renewable resources gain increasing significance in the chemical industry. Chemicals extracted from renewable resources are often times highly functionalized molecules with unsaturated carbon chains, which are used in surfactants or as active ingredients in pharmaceuticals. A limiting factor for their usage is the reduced water solubility due to long carbon chains. 

The Ethenolysis, a reaction in which unsaturated carbon chains react with ethylene in a metathesis reaction, is one way to reduce the length of these carbon chains. 

Reaktionsgleichung: R1-C=C-R2 + C=C ->(+Cat.) R1-C=C + C=C-R2

For increased selectivity and mild reaction conditions, homogeneous catalysts are deployed in this reaction. The downside of homogeneous catalysis is that the catalyst together with the substrates and products are solved in a single phase. Hence, the recovery of the catalyst is increasingly difficult in comparison to heterogeneous catalysis.

Membrane technology is one way to recover solved catalysts without complicated downstream applications or major energy consumption. The usually larger catalyst molecules don’t permeate through the membrane. Furthermore, membranes enable the separation of the product from the reaction mixture. These versatile applications enable different membrane concepts.

Schaubild Trennung von Partikeln durch eine Membran

Publications

  • May 2022, Dortmund, Germany, 11th Workshop on Fats and Oils as Renewable Feedstock for the Chemical Industry, “Recycling of an Unmodified Grubbs-Hoveyda Catalyst in the Self Metathesis of Cardanol via Organic Solvent Nanofiltration”
  • June 2022, Weimar, Germany, 55. Jahrestreffen Deutscher Katalytiker, „Recycling of an Unmodified Grubbs-Hoveyda Catalyst in the Self Metathesis of Cardanol via Organic Solvent Nanofiltration”

Location & approach

The campus of TU Dort­mund University is located close to interstate junction Dort­mund West, where the Sauerlandlinie A 45 (Frankfurt-Dort­mund) crosses the Ruhrschnellweg B 1 / A 40. The best interstate exit to take from A 45 is “Dort­mund-Eichlinghofen” (closer to South Campus), and from B 1 / A 40 “Dort­mund-Dorstfeld” (closer to North Campus). Signs for the uni­ver­si­ty are located at both exits. Also, there is a new exit before you pass over the B 1-bridge leading into Dort­mund.

To get from North Campus to South Campus by car, there is the connection via Vogelpothsweg/Baroper Straße. We recommend you leave your car on one of the parking lots at North Campus and use the H-Bahn (suspended monorail system), which conveniently connects the two campuses.

TU Dort­mund University has its own train station (“Dort­mund Uni­ver­si­tät”). From there, suburban trains (S-Bahn) leave for Dort­mund main station (“Dort­mund Hauptbahnhof”) and Düsseldorf main station via the “Düsseldorf Airport Train Station” (take S-Bahn number 1, which leaves every 20 or 30 minutes). The uni­ver­si­ty is easily reached from Bochum, Essen, Mülheim an der Ruhr and Duisburg.

You can also take the bus or subway train from Dort­mund city to the uni­ver­si­ty: From Dort­mund main station, you can take any train bound for the Station “Stadtgarten”, usually lines U41, U45, U 47 and U49. At “Stadtgarten” you switch trains and get on line U42 towards “Hombruch”. Look out for the Station “An der Palmweide”. From the bus stop just across the road, busses bound for TU Dort­mund University leave every ten minutes (445, 447 and 462). Another option is to take the subway routes U41, U45, U47 and U49 from Dort­mund main station to the stop “Dort­mund Kampstraße”. From there, take U43 or U44 to the stop “Dort­mund Wittener Straße”. Switch to bus line 447 and get off at “Dort­mund Uni­ver­si­tät S”.

The AirportExpress is a fast and convenient means of transport from Dortmund Airport (DTM) to Dortmund Central Station, taking you there in little more than 20 minutes. From Dortmund Central Station, you can continue to the university campus by interurban railway (S-Bahn). A larger range of international flight connections is offered at Düsseldorf Airport (DUS), which is about 60 kilometres away and can be directly reached by S-Bahn from the university station.

The H-Bahn is one of the hallmarks of TU Dort­mund University. There are two stations on North Campus. One (“Dort­mund Uni­ver­si­tät S”) is directly located at the suburban train stop, which connects the uni­ver­si­ty directly with the city of Dort­mund and the rest of the Ruhr Area. Also from this station, there are connections to the “Technologiepark” and (via South Campus) Eichlinghofen. The other station is located at the dining hall at North Campus and offers a direct connection to South Campus every five minutes.

The facilities of TU Dortmund University are spread over two campuses, the larger Campus North and the smaller Campus South. Additionally, some areas of the university are located in the adjacent “Technologiepark”.

Site Map of TU Dortmund University (Second Page in English).