To content

M. Sc. Thomas Roth

Focus of work

  • Multiphase homogeneous catalysis
  • Utilization of renewables
  • Hydroformylation/Hydroaminomethylation
  • Upscaling of novel processes to a continuous miniplant scale

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

Further Information about Thomas Roth

Curriculum Vitae

Thomas Roth studied chemical engineering at TU Dortmund since October 2013. During this time he gained industrial work experience through a internship at Lanxess AG in Krefeld Uerdingen and finished his bachelor thesis with the topic "Construction and calibration of an IR camera for non-invasive temperature measurement at microreactors" in the research group of Prof. Dr. Kockmann. In 2020 he earned his master's degree with the work "Investigation of hydroaminomethylation in the thermomorphic multiphase system on a continuous miniplant scale" under the supervision of Prof. Dr. Vogt. Since June 2020 Thomas works as a research associate at the Laboratory of Industrial Chemistry at TU Dortmund.

Research Topic

Homogeneous transition metal catalysts offer many strengths over heterogeneous catalysts, including high catalyst activity and selectivity even at comparatively mild operating conditions. Despite these advantages, most industrial processes are catalyzed heterogeneously due to the easier and thus more cost-effective separation. Since recycling of the transition metals is indispensable for the economic and ecological sustainability of processes using homogeneous catalysts, the development of efficient separation and recycling concepts is required to make use of their strengths.

The immobilization of the catalyst in multiphase systems offers a promising approach in this respect, as the catalyst phase can be separated and recycled with relatively low effort. However, this approach also poses certain challenges, such as mass transport limitations across the phase interface. Therefore, this research will investigate and optimize different intensification strategies of continuous processes using aqueous multiphase systems for homogeneously catalyzed carbonylation reactions (Fig. 1). In each case, the product phase is separated from the catalyst phase in a decanter, allowing the latter to be recycled to the reactor (Fig. 2).

Reaktion Hydroaminomethylation: R-C-C=C ->(+CO/H2+cat.) R-C-C-C-C=O (Hydroformylation) ->(+HNR2/H2+cat.) R-C-C-C-C-NR2 + H2O ( Reductiv Amination)

The first strategy is the improvement of the mixing and thus the enlargement of the phase interface by using the innovative jetloop reactor (Fig. 2, left). In the second strategy, cyclodextrins are used as phase transfer agents to improve the contacting of the catalyst with substrate molecules at the phase interface (Fig. 2, right).

Schabild: Links: Jetloop Reactor, rechts: reaktor mit anschließender trennoperation und Rückführung

Publications & Conferences

  1. Schlüter, S. , Kühnemann, K. U. , Freis, M. , Roth, T. , Vogt, D. , Dreimann, J. M. , Skiborowski (2021). "Continuous co-product separation by organic solvent nanofiltration for the hydroaminomethylation in a thermomorphic multiphase system". Chem. Eng. J. 409, 128219, DOI: 10.1016/j.cej.2020.128219.

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).