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Title: Method for simultaneously removing SO.sub.2 and NO.sub.X pollutants from exhaust of a combustion system

A method is disclosed for removing pollutants from the exhaust of combustion systems burning fuels containing substantial amounts of sulfur and nitrogen. An exemplary method of the invention involves the formation and reaction of a sorbent comprising calcium magnesium acetate (CMA). The CMA is either dry-sprayed (in the form of a fine powder) or wet-sprayed in an aqueous solution in a high temperature environment such as a combustion chamber. The latter technique is feasible since CMA is a uniquely water-soluble form of calcium and magnesium. When the dispersed particles of CMA are heated to a high temperature, fine calcium and magnesium oxide particles, which are hollow with thin and highly porous walls are formed, affording optimum external and internal accessibility for reacting with toxic gaseous emissions such as SO.sub.2. Further, the combustion of the organic acetate portion of the sorbent results in the conversion of NO.sub.x to N.sub.2.
Inventors:
 [1];  [2]
  1. (Boston, MA)
  2. (Belmont, MA)
Issue Date:
OSTI Identifier:
869302
Assignee:
Northeastern University (Boston, MA) OSTI
Patent Number(s):
US 5312605
Application Number:
07/805,012
Country of Publication:
United States
Language:
English
Subject:
method; simultaneously; removing; pollutants; exhaust; combustion; disclosed; systems; burning; fuels; containing; substantial; amounts; sulfur; nitrogen; exemplary; involves; formation; reaction; sorbent; comprising; calcium; magnesium; acetate; cma; dry-sprayed; form; fine; powder; wet-sprayed; aqueous; solution; temperature; environment; chamber; latter; technique; feasible; uniquely; water-soluble; dispersed; particles; heated; oxide; hollow; highly; porous; walls; formed; affording; optimum; external; internal; accessibility; reacting; toxic; gaseous; emissions; organic; portion; results; conversion; simultaneously removing; combustion systems; fuels containing; combustion chamber; aqueous solution; magnesium oxide; oxide particles; substantial amount; fine powder; systems burning; porous wall; removing pollutants; substantial amounts; highly porous; temperature environment; gaseous emissions; comprising calcium; porous walls; exemplary method; fine calcium; dispersed particles; oxide particle; toxic gas; burning fuels; containing substantial; /423/