Reactor for plasma treatment of gas flow, in particular for treating exhaust gases produced by a vehicle internal combustion engine

摘要

An elongated reactor body (8) made of dielectric material has a number of parallel channels (10) passing through its length. An inlet and an outlet send the gases to be treated through the body, and electrodes (14) form corona discharges in the body to initiate gas treatment. Each electrode (14) is placed in one of the channels (10) and extends over at least part of its length. An elongated reactor body (8) made of dielectric material has a number of parallel channels (10) passing through its length. An inlet and an outlet send the gases to be treated through the body, and electrodes (14) form corona discharges in the body to initiate gas treatment. Each electrode (14) is placed in one of the channels (10) and extends over at least part of its length. The channels are placed side by side in the reactor body in superimposed longitudinal planes, so the electrodes are fitted in at least two parallel beds (12), one containing electrodes connected to one pole of a high voltage source (21) and the other containing electrodes connected to the other pole. The electrodes are a predetermined distance apart. The ends of the electrodes in the same bed and placed on the same front face of the reactor body are connected in common to an electrically conducting bar (15) and linked to the corresponding pole of the high voltage source. The connecting bar is placed in a groove (22) in the end face of the reactor body. The groove is closed by a dielectric material (23). The end of each electrode opposite to the connecting bar is enclosed in a dielectric material (14) closing the channel containing this electrode at the corresponding end. The reactor contains at least three electrode beds and the bed(s) connected to one pole of the high voltage source is/are between two electrode beds connected to the other pole. The electrodes of two adjacent electrode beds are placed in the channels aligned in the planes perpendicular to the electrode bed or are inserted into the channels respectively in fives. The electrodes are rods, preferably with circular section. Some of the electrodes have bumps or roughness extending helically along them. The reactor body is made of ceramic such as cordierite. Independent claims are also included for the following: (1) a particle filter containing a reactor as described above, with the electrode channels, adjacent channels and/or channels in adjacent planes being closed alternately at one or the other end of the reactor. The walls of the channels are coated with a catalytic material. (2) a catalyzer containing a reactor as described above where the electrode channels are open at both ends.