Explosion on a hydrogen tank at a food oil manufacturer

A hydrogen explosion occurred at a company producing soyabean oils. The exact location and causes are unknown, the only fact being reported was that the hydrogen involved a hydrogen tank conversion process, and that the tank was outside the company buildings. It is unclear if the tank was a hydrogen storage tank, or a reactor for hydrogenation of oil.
One fatality.

tank

Part of the processes managed in the affected plant were bleaching, hydrogenation, deodorisation and refinery of soybean oil. The hydrogenation process consisted in mixing unsaturated oil and hydrogen at temperature ranging between 140C to 250 C, in presence of a metal catalyst. Liquid vegetable oils contain fatty acids with double bonds between carbon atoms. Hydrogen breaks the double bonds and attach to the carbons, converting the unsaturated fat into saturated or less unsaturated fat.