METHOD FOR PURIFYING A GAS STREAM INCLUDING MERCURY

摘要

The invention relates to a method for purifying a gas stream including CO2 from nitrogen oxides and elemental mercury (Hg°), said method including the following consecutive steps: a) a step (2) of cooling the gas stream to a temperature T1 lower than the ambient temperature; b) a step (3) of discharging nitrogen oxides from the cooled gas stream; c) a step (2) of heating the purified flow of nitrogen oxides, preferably at a temperature of between 5°C and 150°C; d) a step (4) of discharging the elemental mercury (Hg°) from the gas stream from step c) by means of at least one adsorbent; and e) a step of recovering a CO2-enriched gas stream.