fumaGen H2 – hydrogen production unit

fumaGen H2 – hydrogen production unit

With the fumaGen H2 product range, FUMATECH BWT GmbH has brought a new generation of cost-effective generators for hydrogen and oxygen onto the market. Easy handling, practically maintenance-free operation and a high degree of flexibility make them attractive. Fully desalinated water supply and a power socket are sufficient to provide hydrogen and/or oxygen in places where bottled gas supply is too cumbersome or requires too much space. Operation may be continuous or for occasional use. Reliable – quiet – easy. Areas of application are e.g. supply for fuel cell test plants, gas supply for small-scale soldering and welding devices as well as in laboratories.

Operating principle

The fumaGen H2 operates with fumea membrane electrodes according to the membrane electrolysis principle whereby water is separated into its two components, hydrogen and oxygen. The process is, in essence, the reversal of a fuel cell. 1l water produces 55.6 mol H2, this being 1.2 m3 hydrogen under normal conditions. At an average production of 250 ml hydrogen/min, 1 l water is enough for 83 hours full-load production. There is no need for elaborate gas cleaning, as is the case with alkali electrolysers.

Hydrogen is dried by a gas separator, a membrane dryer and a downstream regenerable molecular sieve cartridge. After roughly three to five months of operation, the cartridge is removed from the apparatus and the molecular sieve is regenerated in a vacuum drying chamber at 120°C. A further molecular sieve cartridge reduced the time needed for this maintenance work to roughly five minutes.
All operating functions are shown in menus on a display. A reliable electronic control system monitors the entire system and ensures that gas is only generated when it is needed.

The standard fumaGen H2 apparatus supplies 0.2 l/min dry hydrogen in 3.0 quality with an output pressure of up to 10 bar.

Safety aspects

fumaGen H2 supplies hydrogen on demand and the system is therefore more safe. In contrast to bottled gas supply, in which the gases are kept at up to 220 bar internal pressure, no special safety precautions (e.g. safety cabinet) have to be taken. The highest gas pressure is around 10 bar. The generator saves roughly 1 – 1.5 l pressurised gas. In a room with normal ventilation, the explosion threshold for hydrogen-air mixtures of 4% - even local – can never be exceeded. In addition, the electronic monitoring system issues an audible warning for slow leaks and then switches off the generator after 20 minutes.