| abstract |
The present invention relates to a filter element used for trapping one or more gaseous pollutants chosen in particular from NOx, SO2, aldehydes and ketones, the filter element comprising at least one DES having a melting point greater than or equal to 45°C, in particular greater than 60°C, and a solid substrate on which the DES has been immobilised, with the element being configured to heat the DES to a temperature at which it can be melted. |