Method and device for electricity production in a fuel cell by the oxidation of hydrocarbons followed by a filtration of particles

Method for producing electricity in which a stream 1 of hydrocarbons and a stream 2 of air are reacted in a partial oxidation chamber 3, the operating conditions being: residence time in the chamber between 100 and 1200 milliseconds outlet temperature of the chamber between 1150 and 1650°C pressure of the chamber between 0.1 and 1.5 MPa. The quantity of soot contained in the effluent is less than 0.1% by weight relative to the feedstock. The effluent from the chamber is cooled and circulated in a soot capture zone comprising a first circuit 6 including at least one first filter 7 and a second circuit 41 which are mounted in parallel, during a period of time, a step of filtering the soot from the effluent is carried out in the first filter which has a ratio of filtration surface area to useful volume between 80 and 5000 m1. During another period of time the first filter is regenerated in the presence of oxygen, and the cooled effluent is circulated in the second circuit. An effluent leaving the capture zone rich in hydrogen is recovered and a fuel cell 10 is fed with this effluent.