On 10th October in their newly opened \\$quot;˜futuristic\\$quot; hydrogen centre in Germany, Linde presented the odourisation of hydrogen and its significance for the safe application of the alternative energy carrier.

Invited participants got the opportunity to smell the odourised hydrogen as it flowed directly out of a bottle during an odour demonstration.

Numerous presentations by Linde partners, TOYOTA, Symrise, Solvicore and ET Energie Technologie took place throughout the day clearly explaining the development of odourised hydrogen.

Linde has proven that it is possible to fuel hydrogen (H2) vehicles well, fast and, above all, safely. However, the fact that hydrogen has no smell and therefore cannot be detected is causing concern amongst the general public. Linde and Symrise worked together on the task of odourising hydrogen so that they could improve the safety of hydrogen in use even further \\$quot;“ and the project has succeeded.

Gasodor Hydrogen provides a reliable warning
According to the company the search for an additive which would give a warning odour to hydrogen but not have any adverse affect on its function needed certain requirements. The additive was supposed to give off a warning odour, however it could not contain sulphur or nitrogen compounds to poison catalysts. It also needed to be compatible with fuel cells and stable in hydrogen, even under high pressure.

Sensory and analytical evaluations of suitable raw materials were carried out. Stability tests were performed on suitable additives, mixtures in hydrogen were examined, and many other tests were carried out during the development phase before individual components were selected for the composition of the odourising agent.

The result was Gasodor™ Hydrogen, which causes no damage to fuel cells, apart from a minor reduction in performance. Even in high pressure hydrogen, it has an excellent stability at temperatures between -30°C and +80°C. The product is easy to handle and stands out from other normal odours allowing for early leakage detection.