Absorption of NOx into Nitric Acid Solution in Rotating Packed Bed

›› 2010, Vol. 18 ›› Issue (2): 244-248.

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles Next Articles

Absorption of NO_x into Nitric Acid Solution in Rotating Packed Bed

LI Yu¹, LIU Youzhi¹, ZHANG Luyao², SU Qiang², JIN Guoliang²

1. Research Center of Shanxi Province for High Gravity Engineering and Technology, Institute of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China;
2. Gansu Yinguang Chemical Group Co., Ltd., Baiyin 730900, China

Received:2009-06-19 Revised:2009-11-09 Online:2010-04-28 Published:2010-04-28
Supported by:
Supported by the Fund of Science and Technology of Shanxi for Young Scholars(2007021012);Research Project of Shanxi Provincial Science and Technology Department(20090321113)

Absorption of NO_x into Nitric Acid Solution in Rotating Packed Bed

李裕¹, 刘有智¹, 张路遥², 苏强², 金国良²

1. Research Center of Shanxi Province for High Gravity Engineering and Technology, Institute of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China;
2. Gansu Yinguang Chemical Group Co., Ltd., Baiyin 730900, China

通讯作者: LIU Youzhi,E-mail:hgliyu@nuc.edu.cn
基金资助:
Supported by the Fund of Science and Technology of Shanxi for Young Scholars(2007021012);Research Project of Shanxi Provincial Science and Technology Department(20090321113)

Abstract

Abstract: Absorption of NO_x into nitric acid solutions was studied in the presence of ozone by using a rotating packed bed(RPB) contactor.The influences of operating parameters,such as high gravity number,amount of ozone,gas velocity,liquid spray density and inlet concentration of NO_x,on the removal efficiency of NO_x were investigated,among which the high gravity number and ozone amount are more important.Ozone was introduced to oxidize HNO₂ to HNO₃ to prevent the decomposition of HNO₂ in the liquid phase.The high gravity number presents the effective external force for enhancing the mass transfer of ozone from gas phase to liquid phase.Under the experimental condition,the removal efficiency of NO_x is higher than 90%and the concentration of nitric acid product exceeds 45%.

Key words: nitrogen oxides, rotating packed bed, ozone oxidation, absorption

摘要： Absorption of NO_x into nitric acid solutions was studied in the presence of ozone by using a rotating packed bed(RPB) contactor.The influences of operating parameters,such as high gravity number,amount of ozone,gas velocity,liquid spray density and inlet concentration of NO_x,on the removal efficiency of NO_x were investigated,among which the high gravity number and ozone amount are more important.Ozone was introduced to oxidize HNO₂ to HNO₃ to prevent the decomposition of HNO₂ in the liquid phase.The high gravity number presents the effective external force for enhancing the mass transfer of ozone from gas phase to liquid phase.Under the experimental condition,the removal efficiency of NO_x is higher than 90%and the concentration of nitric acid product exceeds 45%.

关键词: nitrogen oxides, rotating packed bed, ozone oxidation, absorption

LI Yu, LIU Youzhi, ZHANG Luyao, SU Qiang, JIN Guoliang. Absorption of NO_x into Nitric Acid Solution in Rotating Packed Bed[J]. , 2010, 18(2): 244-248.

李裕, 刘有智, 张路遥, 苏强, 金国良. Absorption of NO_x into Nitric Acid Solution in Rotating Packed Bed[J]. , 2010, 18(2): 244-248.

References

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Absorption of NO_x into Nitric Acid Solution in Rotating Packed Bed

Absorption of NO_x into Nitric Acid Solution in Rotating Packed Bed

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