The state of particle separation from gases is presented in the first part of the paper. It starts with general information on dedusting followed by a description of the four main systems for dust separation: inertial collectors, filtering devices, electrostatic precipitators, and wet scrubbers. The second part of the paper deals with the perspectives of particle separation from gases. Experts agree to the following theses: Electrostatic separators are increasingly replaced by filtering separators; standard needle felts without microfiber layer or membrane are increasingly pushed out of the market; nanoparticle separation is becoming increasingly important for emission reduction; packed bed filters cannot emerge from their niche; the generation of aerosols is a major problem with wet separators. Furthermore current trends are denoted and expected innovations are presented.