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TiO2 preparation by improved homogeneous precipitation and application in SCR catalyst

  • Materials, Metallurgy, Chemical and Environmental Engineering
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Abstract

Ultrasonic treatment and hydrothermal method were applied in the traditional homogeneous precipitation for nano-TiO2 preparation, which was used as carrier material for the production of honeycomb selective catalytic reduction (SCR) catalyst. The influence rules of the two improved methods on characterization of TiO2 samples, denitration activity and mechanical strength of honeycomb SCR catalyst samples were mainly focused on. The results indicate that the specific surface area, particle size and uniformity of TiO2 samples are significantly improved by both of the ultrasonic and hydrothermal treatments compared with the traditional homogeneous precipitation. Also, the denitration activities of catalyst samples are enhanced by the two improved methods (the NO x reduction ratio increases from 88.89% to 95.45% by ultrasonic homogeneous precipitation process, and to 94.12% by hydrothermal homogeneous precipitation process). On the other hand, because of good spherical shape and high particle distribution of TiO2 sample from hydrothermal homogeneous precipitation process, the corresponding honeycomb catalyst samples get the best mechanical strength, which is even higher than that of the reference sample from commercial nano-TiO2. So, it is concluded that the hydrothermal homogeneous precipitation can be a feasible and effective preparation method of TiO2 carrier for the honeycomb SCR catalyst production.

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Authors and Affiliations

  1. Guodian Science and Technology Research Institute, Nanjing, 210046, China

    Jie Yao  (姚杰)

  2. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing, 210096, China

    Jie Yao  (姚杰) & Zhao-ping Zhong  (仲兆平)

Authors
  1. Jie Yao  (姚杰)
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  2. Zhao-ping Zhong  (仲兆平)
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Corresponding author

Correspondence to Jie Yao  (姚杰).

Additional information

Foundation item: Project(201031) supported by the Environmental Protection Scientific Research of Jiangsu Province, China; Project(BE2010184) supported by the Technology Support Program of Jiangsu Province—Industrial Parts, China

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Yao, J., Zhong, Zp. TiO2 preparation by improved homogeneous precipitation and application in SCR catalyst. J. Cent. South Univ. 23, 2139–2145 (2016). https://doi.org/10.1007/s11771-016-3270-2

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  • DOI: https://doi.org/10.1007/s11771-016-3270-2

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