Nitrogenous sorbent for coal combustion

Details Nitrogenous sorbent for coal combustion Nitrogenous sorbent for coal combustion

2006-12-20

2008-12-23

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

C431S002000, C423S242100, C423S243080, C423S244070, C423SDIG018, C422S105000, C110S203000, C110S215000, C110S341000, C110S342000, C110S345000, C110S346000, C110S347000, C110S348000

Reexamination Certificate

active

07468170

ABSTRACT:
Sorbent compositions for coal contain nitrogenous components that reduce the level of mercury and/or sulfur emitted into the atmosphere upon combustion. The sorbent compositions are added directly to the fuel before combustion; directly into the fireball during combustion; are added to the fuel before combustion and into the flue gas post combustion zone; or are added completely into the flue gas post combustion zone, preferably where the flue gas temperature is at least 500° C. The sorbent compositions comprise a source of nitrate ions, a source of nitrite ions, or a combination of nitrate and nitrite sources. The sorbents are added as solids or as solutions in water. In various embodiments, the sorbent compositions further comprise a source of halogen such as bromide.

REFERENCES:
patent: 5735929 (1998-04-01), McLaughlin

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