Clemens Merten

TL;DR: In this article, the cathode carbon catalyst support in polymer electrolyte fuel cells (PEMFC) has been examined and the potential transients occurring during automotive fuel cell operation were simulated by dynamic measurements.

TL;DR: In this paper, the influence of operating conditions and physical properties of gas and liquid phase on initial and final (stable) bubble sizes is discussed, and the measurements were performed in a lab scale bubble column for different liquids sparged with nitrogen for pressures up to 50 bars and temperatures up to 175 °C.

TL;DR: In this paper, a two-dimensional, non-isothermal, two-phase, multicomponent model for the cathode of a PEM fuel cell, which can be applied using both conventional and interdigitated gas distributors, is presented.

TL;DR: In this paper, the thermal behavior of a large format lithium ion cell has been investigated during measurements on cell and battery level, showing that the temperature response to high current loads provides the possibility to investigate internal cell parameters and their inhomogeneity.

TL;DR: In this paper, a novel autothermal reactor concept for decentral hydrogen generation by steam reforming of methanol was designed following the operating principles of a plate heat exchanger, and the design procedure considered numerical simulations and experimental verification, as well as simultaneous study of the mechanical stability of the reactor under realistic thermal and mechanical loads.