Low emission fuel pellet

Abstract

Low emission fuel pellets are formed from fuel sources such as non-recyclable paper and plastic materials by combining sorbent(s) to the interior of the pellet as it is being formed or coating the pellet with sorbent(s) after it has been formed. The sorbent compound is a metal compound preferably formed from an alkaline or alkali earth metal or copper which will react with any acid gases and heavy metals formed during the burning of the pellets to form corresponding stable metal salts, which will remain in the ash.

What is claimed is: 
     
         1 . A pelletized fuel product comprising pelletized fuel and a metal compound effective to react with HCl formed during burning of said fuel product. 
     
     
         2 . The pelletized fuel product claimed in  claim 1  wherein said metal compound is one of a carbonate, hydroxide, oxide, bicarbonate, or organic acid ester. 
     
     
         3 . The pelletized fuel claimed in  claim 1  wherein said metal is an alkali or alkaline earth metal. 
     
     
         4 . The pelletized fuel claimed in  claim 3  wherein said metal is strontium. 
     
     
         5 . The pelletized fuel claimed in  claim 3  wherein said metal is barium. 
     
     
         6 . The pelletized fuel claimed in  claim 1  wherein said metal compound includes at least one of Ba(OH)2 and Sr(OH)2. 
     
     
         7 . The pelletized fuel claimed in  claim 1  wherein said fuel is a blend of paper and plastic and said metal compound is blended with said paper and plastic. 
     
     
         8 . The pelletized fuel product claimed in  claim 1  wherein said fuel is a blend of paper and plastic and said metal compound is coated on said fuel product. 
     
     
         9 . The pelletized fuel product claimed in  claim 1  wherein said metal compound decomposes at a temperature less than 1800° F. 
     
     
         10 . The pelletized fuel product claimed in  claim 1  wherein said metal compound includes a metal ion which forms a metal chloride which is stable at 1400° F. 
     
     
         11 . The method of generating heat by combusting the pelletized fuel claimed in  claim 1  in a stoker boiler or a fluidized bed combustor. 
     
     
         12 . A method of scrubbing combustion gas comprising combusting a fuel pellet comprising a fuel source blended with a sorbent effective to absorb at least one of HCl, HF, SOx or mercury vapor. 
     
     
         13 . The method claimed in  claim 12  wherein said sorbent decomposes at a combustible temperature of 1800° F. or less and during combustion forms a metal chloride which is stable at said combustion temperature. 
     
     
         14 . The method claimed in  claim 2  wherein said sorbent is an alkali or alkaline earth metal compound. 
     
     
         15 . The method claimed in  claim 12  wherein said sorbent includes at least one of a calcium compound, a barium compound and a strontium compound.