Patent ID: 7833315

Claim:
A method for capturing mercury in a flue gas of a combustion system, said method comprising: combusting a mercury containing fuel in a combustion zone of the combustion system, wherein mercury released during combustion is entrained in flue gas generated by the combustion; partially oxidizing a carbonaceous solid fuel in a gasifier local to the combustion system such that a thermally activated carbon-containing solid sorbent and gaseous gasification products are generated, the gasifier comprising a choke arranged in a gasification chamber that regulates a residence time of the solid fuel within the gasification chamber, the gasifier being proximate to a combustion system for combusting a mercury containing fuel; storing the generated thermally activated carbon-containing solid sorbent proximate to the combustion system; injecting the thermally activated solid sorbent in the flue gas and downstream of the combustion zone; injecting at least a portion of the gaseous gasification products into at least one of the combustion system downstream of the combustion zone and a flue duct downstream of the combustion zone as a reburn fuel to facilitate reducing NO x emissions from the combustion system; and absorbing at least a portion of the mercury in the flue gas with the thermally activated solid sorbent.