Process for the removal of acid forming gases from exhaust gases
- El Cerrito, CA
- San Pablo, CA
Exhaust gases are treated to remove NO or NO.sub.x and SO.sub.2 by contacting the gases with an aqueous emulsion or suspension of yellow phosphorus preferably in a wet scrubber. The pressure is not critical, and ambient pressures are used. Hot water temperatures are best, but economics suggest about 50.degree. C. are attractive. The amount of yellow phosphorus used will vary with the composition of the exhaust gas, less than 3% for small concentrations of NO, and 10% or higher for concentrations above say 1000 ppm. Similarly, the pH will vary with the composition being treated, and it is adjusted with a suitable alkali. For mixtures of NO.sub.x and SO.sub.2, alkalis that are used for flue gas desulfurization are preferred. With this process, 100% of the by-products created are usable, and close to 100% of the NO or NO and SO.sub.2 can be removed in an economic fashion.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- Assignee:
- Regents of University of California (Berkeley, CA)
- Patent Number(s):
- US 5164167
- OSTI ID:
- 868542
- Country of Publication:
- United States
- Language:
- English
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Process for the removal of acid forming gases from exhaust gases
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Related Subjects
removal
acid
forming
gases
exhaust
treated
remove
contacting
aqueous
emulsion
suspension
yellow
phosphorus
preferably
wet
scrubber
pressure
critical
ambient
pressures
hot
water
temperatures
economics
suggest
50
degree
attractive
amount
vary
composition
gas
concentrations
10
1000
ppm
similarly
ph
adjusted
suitable
alkali
mixtures
alkalis
flue
desulfurization
preferred
100
by-products
created
usable
close
removed
economic
fashion
water temperature
yellow phosphorus
forming gas
gas desulfurization
exhaust gases
flue gas
hot water
exhaust gas
ambient pressure
acid forming
acid form
ambient pressures
wet scrubber
forming gases
suitable alkali
aqueous emulsion
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