FLUE GAS DESULFURIZATION USING METHANOL AS A SOLVENT AND
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Pergamon
Chemosphere,Vol. 38, No. 13, pp. 3181-3192, 1999
© 1999ElsevierScienceLtd. All rights reserved 0045-6535199/$ - see frontmatter
PII: S0045-6RODUCTION
Sulti~ dioxide is one o f the inorganic pollutants that cause acid rain Many industrial processes, besides automobiles, emit gases that contain sulfur dioxide Therefore, flue gas
electrolysis process, the measured concentrations o f iodine is comparable to the calculated ones, but their is a deviation in the case o f bromine. © 1999 Elsevier Science Ltd. All rights reserved
desult'urization has recently gained growing importance for controlling the emission of sulfur dioxide at source [1,
2]
l h e mosl
Sexeral methods have been used for the removal of sulfur dioxide from flue gases l h e s e desulfurization methods have been well established in the last few decades
Key Words: DesulfurizatJon, Flue gas, Methanol, Iodine, bromine
l Author to whom correspondence is addressed. 2present address : National Center for Nuclear Safety and Radiation Control, P. O. Box 7551, Nasr City, 11762, Cairo, Egypt
widely used desulfurization processes are the wet absorption processes These are divided into H~o\~-ax~a\ pTocesses and regenerable o n e s In the throw-away processes, sulfu~ dioxide is absorbed from the flue gas into a chemical reagent The product is either disposed oftoJ sold as a by-product The most impoi~ant process o f this type is the lime/limestone process thai
FLUE GAS D E S U L F U R I Z A T I O N U S I N G M E T H A N O L AS A S O L V E N T AND B R O M I N E O R I O D I N E AS AN O X I D A N T
Khalil A. Halhouli 1, Aly I. Aly2 and Bilal M. Abu-Ashour Department of Chemical Engineering Jordan University of Science and Technology lrbid, 221 10, Jordan e-mail: halhouli@.jo (Receivedin USA 28 July 1998; accepted6 October1998) ABSTRACT
A new method is used to remove sulfur dioxide from the flue gas using iodine as an oxidant and methanol as a solvent. The flue gas that contains sulfur dioxide was bubbled through a solution containing the oxidant and the solvent. The experimental results are
compared with those obtained from similar experiments using bromine in water and bromine in methanol solutions. Methanol was used to avoid bromine stripping from water Bromine and iodine are. regenerated by the electrolysis o f the resulting hydrobromic and hydroiodic acids. Sulfuric acid and hydrogen gas are the products o f the electrolysis process. The use o f iodine in this study shows higher desulfurization rate than using bromine. Moreover, during the
Chemosphere,Vol. 38, No. 13, pp. 3181-3192, 1999
© 1999ElsevierScienceLtd. All rights reserved 0045-6535199/$ - see frontmatter
PII: S0045-6RODUCTION
Sulti~ dioxide is one o f the inorganic pollutants that cause acid rain Many industrial processes, besides automobiles, emit gases that contain sulfur dioxide Therefore, flue gas
electrolysis process, the measured concentrations o f iodine is comparable to the calculated ones, but their is a deviation in the case o f bromine. © 1999 Elsevier Science Ltd. All rights reserved
desult'urization has recently gained growing importance for controlling the emission of sulfur dioxide at source [1,
2]
l h e mosl
Sexeral methods have been used for the removal of sulfur dioxide from flue gases l h e s e desulfurization methods have been well established in the last few decades
Key Words: DesulfurizatJon, Flue gas, Methanol, Iodine, bromine
l Author to whom correspondence is addressed. 2present address : National Center for Nuclear Safety and Radiation Control, P. O. Box 7551, Nasr City, 11762, Cairo, Egypt
widely used desulfurization processes are the wet absorption processes These are divided into H~o\~-ax~a\ pTocesses and regenerable o n e s In the throw-away processes, sulfu~ dioxide is absorbed from the flue gas into a chemical reagent The product is either disposed oftoJ sold as a by-product The most impoi~ant process o f this type is the lime/limestone process thai
FLUE GAS D E S U L F U R I Z A T I O N U S I N G M E T H A N O L AS A S O L V E N T AND B R O M I N E O R I O D I N E AS AN O X I D A N T
Khalil A. Halhouli 1, Aly I. Aly2 and Bilal M. Abu-Ashour Department of Chemical Engineering Jordan University of Science and Technology lrbid, 221 10, Jordan e-mail: halhouli@.jo (Receivedin USA 28 July 1998; accepted6 October1998) ABSTRACT
A new method is used to remove sulfur dioxide from the flue gas using iodine as an oxidant and methanol as a solvent. The flue gas that contains sulfur dioxide was bubbled through a solution containing the oxidant and the solvent. The experimental results are
compared with those obtained from similar experiments using bromine in water and bromine in methanol solutions. Methanol was used to avoid bromine stripping from water Bromine and iodine are. regenerated by the electrolysis o f the resulting hydrobromic and hydroiodic acids. Sulfuric acid and hydrogen gas are the products o f the electrolysis process. The use o f iodine in this study shows higher desulfurization rate than using bromine. Moreover, during the
