CHEMICAL DESALTING OF SALINE WATER USING AMMONIA & CARBON DIOXIDE: DEVELOPMENTS IN PROCESS SYNTHESIS

Hussein Abdel-Aal, Khaled Zohdy

Abstract


In the experimental work reported by Abdel-Aal and coworkers (1996) & (1997), the conversion of both Na+ and Cl- found in saline water into separable chemical products was achieved by bubbling ammonia through brine followed by the chemical reaction with carbon dioxide gas. The products obtained are soda ash (Na2CO3) and ammonium chloride (NH4Cl) along with partially desalted water.

In this paper, new development is introduced in the process synthesis to allow for ammonia to be recycled rather than consumed, since ammonia plays a key role in this staged chemical reaction sequence. A conceptual flow scheme for the modified process is presented along with the production- consumption analysis. A comparison is made between the proposed method and the Solvay process.


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DOI: http://dx.doi.org/10.17628/ecb.2013.2.352-354

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