SCI和EI收录∣中国化工学会会刊

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

• SEPARATION SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Absorption of NOx into Nitric Acid Solution in Rotating Packed Bed

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

  1. 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 NOx 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. 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: Absorption of NOx 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 NOx,on the removal efficiency of NOx 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 NOx 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 NOx 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 NOx,on the removal efficiency of NOx 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 NOx is higher than 90%and the concentration of nitric acid product exceeds 45%.

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