ZBT presents latest innovations in high-temp PEM and reforming
T he Zentrum fΓΌr Brennstoffzellen- Technik ZBT fuel cell research center in Germany reported on its latest progress at the recent Hannover Fair, with new technology developments in both high-and low-temperature PEM fuel cells, reforming reactors for stationary and mobile applications, and its latest developments for fuel cell systems.
ZBT engineers have been working on hightemperature fuel cell membranes since 2004, and this technology promises to be a costeffective and impurity-tolerant alternative to classical low-temperature technologies. With operating temperatures around 180Β°C, such HT-PEM fuel cells are more resistant to the harmful components found in hydrogen reformate. Furthermore, the usability of the greater thermal energy is an interesting option for cogeneration applications. Until now there has been little experience regarding suitable materials for the construction of the fuel cell stacks and the layout of an efficient media management for such systems. ZBT is researching this area, and was operating a working high-temperature fuel cell stack with commercially available membranes at the institute's booth.
A further highlight is a 4 kWth natural gas steam reformer for stationary hydrogen production in residential power supply fuel cell systems. The well tested technology is patented, and has been licensed to a variety of international industrial partners. The ongoing development is not focused on optimization of the already high reactor efficiency, but rather on construction improvements with a view to production and durability.
ZBT also reported on developments for mobile auxiliary power units (APUs). Significant progress has been made recently to develop propane-based APU technology for sailing yachts, in which a reformer is coupled with a fuel cell stack. The institute has applied for the necessary patents, which will allow licensing or joint development with interested partners. ZBT also showed hydrogen-powered systems for special light traction applications.