Renault patent: generation of hydrogen by high temperature conversion of water vapor

Renault patent: generation of hydrogen by high temperature conversion of water vapor

Keywords: Reforming, reforming, cracking, cracking, vapocraking, catalytic cracking, thermal cracking, catalyst, fuel cell, fuel cell, hydrogen, synthesis, oxygenation, autothermal, exothermic, endothermic.

Title of the patent (s):
Method and device for generating hydrogen by high temperature conversion with water vapor

Patent number: FR2831532

Inventor: Armines Association for research and development of methods and industrial process. Renault.

Date of removal: 26 October 2001

Our scientific opinion:

Patent aimed at protecting a process for synthesizing a gas rich in hydrogen by thermal reforming of conventional fuels (gasoline, diesel, LPG / CNG, even vegetable oils or alcohols).
The application is obviously an on-board reformer for supplying a vehicle fuel cell.

The real particularity of this patent is firstly to make a thermal cracking and no longer catalytic compared to the already known patents and systems, secondly to use conventional fuels (this unlike the reforming of methanol) and thirdly to carry out a steam reforming: reforming in the presence of water vapor.

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These three points have strong similarities with the pantone process (in 100% pantone phase and no water doping): no catalyst, presence of water vapor and use of conventional fuels. Similar operating temperatures.

Thus we read: "For hydrocarbons heavier than methane, the (reforming) temperatures are lower (below 850 ° C)"

Autothermal reforming is also mentioned: it is a thermal equilibrium between a partial oxidation reaction (exothermic) and reforming (endothermic) which can be particularly interesting in certain cases.

Finally, let us state that it is a great pity that the patent has such anteriorities (2 X, flagrant anticipation, on all the claims) that it will undoubtedly not be easily exploited.

Download Renault patent FR2831532 on the generation of H2 from water vapor

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