A model of volatile organic compound condensation in dense fluidized bed was used to simulate a new depollution process by separation in fluidized bed. The volatile compounds are condensed and captured by fluidized porous particles before being renewed in an evaporation reactor and recirculated to the condensation riser. This study shows how a large bed height, a small superficial gas velocity, a cold wall temperature provided that the condensation products that do not turn into solid state give a high and stable abatement rate as well as it provides a good use of the internal porosity of the particles. It is also demonstrated that, as already known after thermodynamics constraints, this condensation process is better adapted to high-concentrated effluent and needs a complementary separation system if regulations are severe. (C) 2003 Elsevier Ltd. All rights reserved.