Patent ID: 7255842

Claim:
A process for removing acid anhydrides precursors and other acid moieties from flue gases, the process comprising: a) cooling the flue gases containing CO 2 , acid anhydride precursors and other acid moieties; b) removing particulate matter from the flue gases; c) oxidizing the acid anhydrides precursors to oxidized anhydrides, wherein the acid anhydrides precursors are selected from the group consisting of SO 2 and NO x , and the acid moieties are selected from the group consisting of HCl, HF and hydrogen halides; d) simultaneously converting the oxidized anhydrides precursors and the other acid moieties to ammonia salts by reaction with ammonia-containing compounds; e) subsequently converting CO 2 to an ammonia salt by reaction with aqua ammonia; and f) collecting the ammonia salts from steps d) and e).