Method for simultaneously removing SO.sub.2 and NO.sub.X pollutants from exhaust of a combustion system
- Boston, MA
- Belmont, MA
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.
- Assignee:
- Northeastern University (Boston, MA)
- Patent Number(s):
- US 5312605
- Application Number:
- 07/805,012
- OSTI ID:
- 869302
- Country of Publication:
- United States
- Language:
- English
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simultaneously
removing
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exhaust
combustion
disclosed
systems
burning
fuels
containing
substantial
amounts
sulfur
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exemplary
involves
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sorbent
comprising
calcium
magnesium
acetate
cma
dry-sprayed
form
fine
powder
wet-sprayed
aqueous
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feasible
uniquely
water-soluble
dispersed
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heated
oxide
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highly
porous
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internal
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reacting
toxic
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emissions
organic
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combustion systems
fuels containing
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aqueous solution
magnesium oxide
oxide particles
substantial amount
fine powder
systems burning
porous wall
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substantial amounts
highly porous
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exemplary method
fine calcium
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oxide particle
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