Abstract: GL-1 dechlorination adsorbent developed by Research Institute of Petroleum Processing has been applied in the 0.7 Mt/a CCR unit of Luoyang Petroleum Chemical Corporation since May 2009. The results of more than two years stably operation show that GL-1 dechlorination adsorbent possesses good dechlorination performance, for treating regeneration flue gas, the HCl mass fraction of treated gas is less than 0.5 μg/g. It also exhibits excellent anti-carbonation, anti-caking and anti-argillitization properties, thus the pressure drop of the dechlorination adsorbent bed is less than 0.03 MPa and its service life is over 4 months, which well meets the requirements for the dechlorination of regeneration flue gas in CCR unit.