System for removal of pollutants from a gas stream

A system for removal of target pollutants from gases, comprising:

• A. at least one feeder selected from the group consisting of a dry sorbent feeder, a sorbent slurry feeder, sorbent filter cake feeder, and a feeder system, the feeder containing a supply of a sorbent comprised of a regenerable metal oxide, the feeder being configured to handle and feed the sorbent, wherein metal oxide is a metal oxide that is insoluble in aqueous solutions and that produces soluble and/or thermally decomposable reaction products when reacted with a target pollutant in a gas stream;
• B. at least one reaction zone configured for introduction of the sorbent and a gas containing at least one target pollutant, where gas is introduced and contacted with the sorbent for a time sufficient to effect capture of the target pollutant at a targeted pollutant capture rate through formation of a reaction product, the at least one reaction zone being comprised of at least one bag house having fabric filter bags disposed therein and optionally preceded by a gas-solids reaction unit, the metal oxides being in particle form when introduced in to the bag house and having an average particle size of about 0.1 to about 500 microns and a BET value ranging from about 1 to about 1000 m2/g;
• and
• C. a controller for simultaneously monitoring and adjusting system operational parameters, the controller providing integrated control of system differential pressure and other operational parameters selected from the group consisting of target pollutant capture rates, gas inlet temperature, sorbent feed rate and any combination thereof, wherein differential pressure within the system is regulated so that any differential pressure across the system is no greater than a predetermined level and the target pollutants are removed at their targeted capture rate set points.