▁poll ut ants , ▁including ▁am ines ▁and ▁am mon ia , ▁which ▁can ▁react ▁to ▁form ▁car cin ogen ic ▁nit ros am ines . ▁Cal ci um ▁looping , ▁on ▁the ▁other ▁hand , ▁does ▁not ▁produce ▁harm ful ▁poll ut ants . ▁In ▁addition , ▁not ▁only ▁does ▁it ▁capture ▁CO 2 , ▁but ▁it ▁also ▁removes ▁the ▁poll ut ant ▁SO 2 ▁from ▁the ▁fl ue ▁gas . ▁ ▁This ▁is ▁both ▁an ▁advantage ▁and ▁dis adv antage , ▁as ▁the ▁air ▁quality ▁impro ves , ▁but ▁the ▁captured ▁SO 2 ▁has ▁a ▁det r iment al ▁effect ▁on ▁the ▁c ement ▁that ▁is ▁generated ▁from ▁the ▁calci um ▁looping ▁was tes . ▁ ▁Adv antages ▁and ▁draw back s ▁ ▁Adv antages ▁of ▁the ▁process ▁ ▁Cal ci um ▁looping ▁is ▁considered ▁as ▁potential ▁prom ising ▁solutions ▁to ▁reduce ▁CO 2 ▁ ▁capture ▁energy ▁penalty . ▁There ▁are ▁many ▁advantages ▁from ▁the ▁calci um ▁looping ▁methods . ▁First ly , ▁the ▁method ▁has ▁been ▁proved ▁to ▁yield ▁a ▁low ▁efficiency ▁pen alt ies ▁( 5 - 8 % ▁points ) ▁while ▁other ▁m ature ▁CO 2 ▁▁ ▁capture ▁systems ▁yield ▁a ▁higher ▁efficiency ▁pen alt ies ▁( 8 - 1 2 . 5 %). ▁Moreover , ▁the ▁method ▁is ▁well ▁su ited ▁for ▁a ▁wide ▁range ▁of ▁fl ue ▁g ases . ▁Cal ci um ▁looping ▁is ▁applicable ▁for ▁new ▁builds ▁and ▁retro f its ▁to ▁existing ▁power ▁stations ▁or ▁other ▁station ary ▁industrial ▁CO 2 ▁sources ▁because