Renault patent: generating hydrogen by high temperature steam conversion
Keywords: Reforming, reforming, cracking, cracking, vapocraking, catalytic cracking, thermal cracking, catalyst, fuel cell, fuel cell, hydrogen, synthesis, oxygenation, autothermal, exothermic, endothermic.
Title or patents:
Method and hydrogen generating device by high temperature shift with steam
Patent number: FR2831532
inventor: Armines Association for research and development of methods and industrial processes. Renault.
Date filed: 26 October 2001
Our scientific opinion:
Patent aiming to protect a method of synthesizing a hydrogen-rich gas by thermal reforming conventional fuels (gasoline, diesel oil, LPG / CNG, even vegetable oils or alcohols).
The application is a recess board reformer for feeding a fuel cell powered vehicle.
The real peculiarity of this patent is firstly to make a thermal cracking and catalytic either with respect to patents already known systems and secondly to use conventional fuels (this in contrast to the reforming of methanol) and thirdly to conduct a steam reforming: reforming in the presence of water vapor.
These three points have strong similarities with the pantone process (in 100% pantone phase and not water doping): no catalyst, the presence of water vapor and use of conventional fuels. Temperatures similar operation.
Thus we read: « Pour des hydrocarbures plus lourds que le méthane, les températures ( de reforming ) sont plus faibles ( inférieures à 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 some cases.
Finally, note that it is a pity that the present patent as prior art (2 X, blatant anticipation, on all claims) that he will probably not be operated easily.