The invention relates to a method for determining the concentration of aerosols in hot gases, particularly in exhaust gases of internal combustion engines, wherein volatile and semi-volatile particles are removed by heating the exhaust gas and the concentration of the aerosols is measured, if necessary, in a partial flow of an exhaust gas flow that has been diluted if required. In order to allow the aerosol concentration in the exhaust gas to be measured precisely and with low power requirements, the exhaust gas is divided, in a first stage, into two partial flows both of which are heated, one of these partial flows being filtered at least once preferably prior to heating, and the two partial flows being subsequently recombined. In a second stage, the exhaust gas is re-divided into two partial flows, one of these partial flows being heated even higher than in the first stage, and the other partial flow being filtered at least once. The two partial flows are subsequently recombined and the concentration is then measured in the combined total flow.
|Translated title of the contribution||METHOD AND DEVICE FOR DETERMINING THE CONCENTRATION OF AEROSOLS IN HOT GASES, PARTICULARLY IN EXHAUST GASES OF INTERNAL COMBUSTION ENGINES|
|IPC||G01N 15/ 02 A I|
|Publication status||Published - 21 Mar 2013|