A new procedure for sulfur dioxide removal from simulated flue gas with byproduct ammonium sulfate /
The adsorptive characteristics of ammonia and the capacity of
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Summary: | 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 operation for S02+NH3(47.34%)+CO2 and S02+NH3(47.34%) 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 application. |
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| Item Description: | Vita. "Major subject: Chemical Engineering". |
| Physical Description: | x, 74 leaves : illustrations ; 28 cm. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: pages 67-71. |