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¡¶ÄϾ©Àí¹¤´óѧѧ±¨¡·£¨×ÔÈ»¿Æѧ°æ£©[ISSN:1005-9830/CN:32-1397/N]

Issue:

2013Äê01ÆÚ

Page:

164-

Research Field:

Publishing date:

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Title:

Investigation of NO2absorption in water or dilute nitric acid

Author(s):

Geng Jiao¹; ²; Wang Xiaoxu¹; Yuan Gang¹; Zhang Feng¹; Zhang Zhibing¹; ²

1.School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210093,China; 2.National Organic Poison Control and Resource Engineering Technology Research Center, Nanjing 210093,China

Keywords:

NO2; absorption; nitric acid; absorption mechanism; resourceful treatment

PACS:

TQ021.4

DOI:

-

Abstract:

For resourceful treatment of NOx waste gases,the performance of NO2 absorption in water or dilute nitric acid is investigated to explore the influence of the absorbent amount,nitric acid concentration(3%~30%)and absorption pressure.It is found that the increase in absorbent amount,nitric acid concentration and absorption pressure all lead to the higher absorption efficiency.Absorption of NO2 in water includes chemical and physical absorption processes,furthermore,physical diffusion and chemical reaction exist in both gas and liquid phases.In the present work,the composition of HNO2 and HNO3 in the absorption solution is analyzed and the variations in the concentration of NO2 and N2O4 in gas phase are compared before and after the absorption.It is proved that the absorption occurs mainly with the chemical reaction of N2O4 and water.

References:

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Last Update: 2013-02-15