Patent ID: 8961916
Filing Date: 2015-02-24
Classification: B01D,Y02C

Abstract:
1. A method for scrubbing sulfur dioxide from flue gas using an aqueous stream enriched with calcium chloroaluminate or calcium chloroferrate, said method comprising the steps of: (a) injecting said flue gas into a precipitator through at least one nozzle; (b) injecting said aqueous stream said enriched with calcium chloroaluminate or calcium chloroferrate into said precipitator through at least one nozzle to react said sulfur dioxide with calcium hydroxide crystals from said chloroaluminate or calcium chloroferrate to form precipitates comprising calcium sulfoaluminate or calcium sulfoferrate; (c) injecting an amine solvent into said precipitator through at least one nozzle to enhance said precipitates of said calcium sulfoaluminate or calcium sulfoferrate; (d) liberating carbon dioxide in a near pure form from said flue gas; (e) removing said precipitates of said calcium sulfoaluminate or calcium sulfoferrate from said aqueous stream or by filtering; (f) removing at least most of said amine solvent from said aqueous stream by stripping; (g) recycling said aqueous stream and said amine solvent to said precipitator.