http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
new procedure for sulfur dioxide removal from simulated flue gas with byproduct ammonium sulfate
The adsorptive characteristics of ammonia and the capacity of
ammonium carbonate salts on various sorbents were
investigated. Selexsorb CDX was found to be the most
effective sorbent for ammonia and ammonium carbonate salts.
The adsorption of pure S02 and C02 as well as S02 in
simulated flue gas on the Selexsorb CDX also has been
assessed. The Selexsorb CDX displays an excellent adsorption
capacity not only for ammonia but also for S02- The study
of S02 removal by Selexsorb CDX impregnated with ammonia or
ammonium carbonate salts has been performed experimentally in
a packed column under two ammonia concentrations and various
temperatures. The S02 removal was favored at low
temperatures for all reaction systems. The Selexsorb CDX
impregnated with ammonia solution (47.34%) was found to be
the most promising sorbent in the removal of S02 at 298 K in
this study. The S02 removal capacity is 156mg/g and the
corresponding ammonium sulfate yield is 320mg/g with the S02
removal efficiency 90%. The extracted products solution and
its respective crystalline solid were analyzed and determined
by wet chemistry, pH measurement, XPS and FTIR. The main
reaction product for NH3(,,,) + C02 was ammonium
bicarbonate. Our XPS surface analysis indicated that
ammonium sulfate was the main product before extraction
systems. The product was easily oxidized to form ammonium
sulfate. This was further confirmed by the FTIR analysis for
the respectively extracted solid products. The regeneration
experiment of the spent Selexsorb CDX was also conducted.
The experimental results demonstrated that the sorbent is
easy to be regenerated under nitrogen flushing at 433K
following the product extraction operation. The study
results have shown the potential for removing S02 from flue
gas via the Selexsorb CDX soaked with high concentration
ammonia solution or its carbonate salts to produce ammonium
sulfate. Comparing the whole operation and process to the
traditional FGD process, this new procedure for sulfur
dioxide removal may be very promising for industrial
Issued also on microfiche from Lange Micrographics.
Includes bibliographical references: pages 67-71.