Chemical-looping combustion method with dilute phase removal of ashes and fines in the oxidationzone and plant using same

A method for chemical-looping combustion of a hydrocarbon feedstock of solid particles, wherein an oxygen-carrying material circulates in form of particles, comprising:

• contacting hydrocarbon feedstock particles with the oxygen-carrying material particles in a reduction zone R0,
• contacting oxygen-carrying material particles from reduction zone R0 with an oxidizing gas stream in a reactive oxidation zone R1,
• separating the fly ashes, the fines and the oxygen-carrying material particles within a mixture from zone R1 by dilute phase elutriation in a dilute phase separation zone S2 so as to discharge through a discharge line a gaseous effluent comprising the major part of the fly ashes and of the oxygen-carrying material fines, and to send a particle stream comprising the major part of the oxygen-carrying particles to reduction zone R0, the driving force required for dilute phase elutriation in S2 being provided by the oxidizing gas stream coming from reactive oxidation zone R1.