Renault patent: hydrogen generation 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 intended to protect a process for the synthesis of a hydrogen-rich gas by thermal reforming of conventional fuels (petrol, diesel, LPG / CNG, even vegetable oils or alcohols).
The application is obviously an on-board reformer to power a vehicle fuel cell.
The real characteristic of this patent is firstly to make a thermal cracking and no longer catalytic compared to the patents and systems already known, secondly to use conventional fuels (this contrary to the reforming of methanol) and thirdly to proceed to a steam reforming: reforming in the presence of water vapor.
These three points have strong similarities with the pantone process (in the 100% pantone phase and not 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 (exothermic) and reforming (endothermic) reaction which can be particularly advantageous in certain cases.
Finally, it should be noted that it is a great pity that the patent has such prior art (2 X, obvious prior art, over all of the claims) that it will probably not be easily exploited.