Patent ID: 7381387

Claim:
A method to reduce mercury in gas emissions from the combustion of low rank coal in a combustion system, said method comprising: a. combusting the low rank coal having a low chlorine content in the combustion system, wherein elemental mercury (Hg 0 ) is released in the flue gas produced by the combustion of the low rank coal; b. releasing chlorine into the flue gas by combusting a second coal type with the low rank coal in the combustion system, wherein the second coal type has a high chlorine content; c. reacting the elemental mercury and released chlorine in the flue gas to oxidize the mercury; d. adsorbing at least a portion of the oxidized mercury generated by the combustion of the first and second coal with an adsorbent in the flue gas, and e. collecting the adsorbent with the oxidized mercury in a combustion waste treatment system.