CIESC Journal ›› 2018, Vol. 69 ›› Issue (6): 2655-2663.doi: 10.11949/j.issn.0438-1157.20171293

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Properties on NO removal over pyrolyzed sludge carbon

YIN Andong, DENG Wenyi, MA Jingchen, SU Yaxin   

  1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
  • Received:2017-09-27 Revised:2017-12-03 Online:2018-06-05 Published:2017-12-18
  • Supported by:

    supported by the National Natural Science Foundation of China (51408111).

Abstract:

In this study, sewage sludge was pyrolyzed and treated by acid-washing, KOH activation, Fe impregnation and H2 reduction for NO removal. The results showed that the original samples containing Fe2P and FeS had remarkable performance for NO conversion. At 450-500℃, the maximum NO conversion over the original samples was about 81%. However, NO conversion over acid-washed and KOH activated samples decreased dramatically due to removal of Fe2P and FeS, and the maximum NO conversion at 450-500℃ was only about 30% and 53%, respectively. However, the maximum NO conversion over pyrolyzed sludge carbon impregnated with Fe was only 50% at 450-500℃. The reason was that Fe in the impregnated sample was mainly existed in the form of Fe2O3. After H2 reduction, Fe2O3 was reduced to Fe2P and FeS, and the maximum NO conversion was also greatly enhanced to 94% at 450-500℃.

Key words: pyrolysis, catalysis, pollution, sewage sludge, NO conversion

CLC Number: 

  • TK6

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