The present disclosure is directed to an additive mixture and method for controlling nitrogen oxide(s) by adding the additive mixture to a feed material prior to combustion.

Emissions of mercury, NOx, and/or SOx are reduced by enzyme treating coal before combustion, optionally with further treatment of the coal with certain non-bromine containing powder sorbents. y using the steps together, mercury can be reduced by 40% or more, and NOx by 20% or more. Advantageously, no bromine is introduced with the remediation steps.

Emissions of mercury, NOx, and/or SOx are reduced by enzyme treating coal before combustion, optionally with further treatment of the coal with certain non-bromine containing powder sorbents. y using the steps together, mercury can be reduced by 40% or more, and NOx by 20% or more. Advantageously, no bromine is introduced with the remediation steps.

A method for preparing a briquette binder using a landfill leachate and a method for producing an industrial briquette using the briquette binder. The landfill leachate is modified by sulfonation and amination, and is mixed with the modified rice straws to prepare the briquette binder, so as to effectively use the products generated in garbage processing to realize secondary economic benefits in garbage processing. The industrial briquette is produced by the prepared briquette binder, and the industrial briquette is used as steam coal or metallurgical coal with large briquette consumption, so as to promote the resource utilization of the landfill leachate, reduce the cost in preparation of the briquette binder and enhance benefits.

A method for preparing a briquette binder using a landfill leachate and a method for producing an industrial briquette using the briquette binder. The landfill leachate is modified by sulfonation and amination, and is mixed with the modified rice straws to prepare the briquette binder, so as to effectively use the products generated in garbage processing to realize secondary economic benefits in garbage processing. The industrial briquette is produced by the prepared briquette binder, and the industrial briquette is used as steam coal or metallurgical coal with large briquette consumption, so as to promote the resource utilization of the landfill leachate, reduce the cost in preparation of the briquette binder and enhance benefits.

Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components reduce emissions of elemental and oxidized mercury; increase the level of Hg, As, Pb, and/or Cl in the coal ash; decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and make a highly cementitious ash product.

Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components reduce emissions of elemental and oxidized mercury; increase the level of Hg, As, Pb, and/or Cl in the coal ash; decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and make a highly cementitious ash product.

A flue gas additive is provided that includes both a nitrogenous component to reduce gas phase nitrogen oxides and a halogen-containing component to oxidize gas phase elemental mercury.

A flue gas additive is provided that includes both a nitrogenous component to reduce gas phase nitrogen oxides and a halogen-containing component to oxidize gas phase elemental mercury.

Sorbent compositions containing calcium and iodine are added to coal to mitigate the release of mercury and/or other harmful elements into the environment during combustion of coal containing natural levels of mercury.