Refinement of Oxygen Dioxide Through Removing Nitrogen Oxides by Means of Reduced Method of Urea Water Solution

Abstract

Abstract: A new process was proposed for removing the nitrogen oxides(NO_x) from the CO₂ waste gases from the lime torrefied ratary furnace in Shanghai Baoshan Steel and Iron Company by means of absorption method of aqueous urea solution in order to recover highly pure CO₂ for producing high quality beverage. The result obtained shows that the concentration of nitrogen oxides can be decreased from 6.5×10^-4 mol/L to below 2.0×10^-6 mol/L, the removing rate was over 99%. In the experiment, we made NO coming from the reaction NO₂ +H₂O be all oxidized to NO₂ by using a special oxidized method, which was the key step for removing nitrogen oxides.

Key words: Urea, Water solution, Removing of nitrogen oxides, Refinement of CO₂

CLC Number:

O641

TrendMD:

WANG Shu-Jiang, YANG Ji . Refinement of Oxygen Dioxide Through Removing Nitrogen Oxides by Means of Reduced Method of Urea Water Solution[J]. Chem. J. Chinese Universities, 2004, 25(9): 1730.

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Refinement of Oxygen Dioxide Through Removing Nitrogen Oxides by Means of Reduced Method of Urea Water Solution

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