A bifunctional MnOx@PTFE catalytic membrane for efficient low temperature NOx-SCR and dust removal

Shasha Feng; Mengdi Zhou; Feng Han; Zhaoxiang Zhong; Weihong Xing

doi:10.1016/j.cjche.2019.11.014

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A bifunctional MnO_x@PTFE catalytic membrane for efficient low temperature NO_x-SCR and dust removal

Separation Science and Engineering | Updated：2026-01-06

- A bifunctional MnO_x@PTFE catalytic membrane for efficient low temperature NO_x-SCR and dust removal
- Chinese Journal of Chemical Engineering Vol. 28, Issue 5, Pages: 1260-1267(2020)
- Affiliations：
  
  1. State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Research Center for Special Separation Membrane, Nanjing Tech University,Nanjing,China,210009
  2. Nanjing Industrial Technology Research Institute of Membrane Material Co. Ltd.,Nanjing,China,211100
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.11.014
  CLC：
- Published：2020
- Accepted：
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@PTFE catalytic membrane for efficient low temperature NO
DOI：

@PTFE catalytic membrane for efficient low temperature NO DOI： 10.1016/j.cjche.2019.11.014.

摘要

Abstract

Low-temperature selective catalytic reduction of NO

combined with dust removal technique due to its energy conservation characteristic has been attracted much attention for fume purification. In this work

the MnO

wrapped PTFE membrane with efficient dust removal and low-temperature NH

-SCR has been prepared with a facile route. MnO

with different crystal structures was uniformly grown around the PTFE fibrils through water bath. The flower-sphere-like MnO

@PTFE(O-MnO

@PTFE) and lamellar-interlaced ripple-like MnO

@PTFE(W-MnO

@PTFE) have large specific surface area which is favorable for enhancing catalytic performance. Also

the uniformly wrapped W-MnO

around the PTFE fibrils optimized the pore structure for ultrafine dust capture. The membrane can almost 100% reject particles that are smaller than 1.0 μm with a low filtration resistance. Meanwhile

W-MnO

@PTFE with more surface chemisorbed oxygen has the best NO conversion efficiency of 100% at a comparatively low and wide activit

y temperature window of 160-210℃

which is far to the thermal limitation of the PTFE. Therefore

this efficient and energy conserving membrane has a bright application prospects for tail gas treatment compared to the original treatment process.

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