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Environmental Science and Pollution Research

, Volume 26, Issue 13, pp 12920–12927 | Cite as

Effects of manganese content and calcination temperature on Mn/Zr-PILM catalyst for low-temperature selective catalytic reduction of NOx by NH3 in metallurgical sintering flue gas

  • Zhicheng Han
  • Qingbo YuEmail author
  • Zhaolong Teng
  • Bin Wu
  • Zhijia Xue
  • Qin Qin
Research Article
  • 57 Downloads

Abstract

The effects of manganese content, carrier calcination temperature, and catalyst calcination temperature of manganese-based zirconium pillared intercalated montmorillonite (Mn/Zr-PILM) catalysts were investigated for low-temperature selective catalytic reduction of NOx by NH3 (NH3-SCR) in the metallurgical sintering flue gas. The physicochemical properties of these catalysts can be characterized by X-ray diffraction (XRD), N2 adsorption-desorption isotherm, and temperature-programmed desorption of ammonia (NH3-TPD). The 10Mn/Zr400-PILM(300) catalyst had the highest NOx conversion under excess oxygen conditions (15 vol% oxygen) and reached 91.8% NOx conversion at 200 °C. It was found that when the loading of manganese was 10 wt.%, the catalyst had the highest catalytic activity and the manganese-active component was highly dispersed on the Zr-PILM surface. The optimal calcination temperature of the Zr-PILM was 400 °C because the catalyst pore size was concentrated at 1.92 nm and the catalyst had the most acidic sites. And the optimum calcination temperature of the catalyst was 300 °C. This was because excessive calcination temperature promoted the manganese oxide polymerization and reduced the catalytic activity of the catalyst.

Keywords

Low-temperature NH3-SCR Mn/Zr-PILM Calcination temperature Metallurgical sintering flue gas 

Notes

Funding information

This research was supported by the Major State Research Development Program of China (2017YFB0603603) and the National Natural Science Foundation of China (51576035).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of MetallurgyNortheastern UniversityShenyangPeople’s Republic of China
  2. 2.College of Energy and Power EngineeringShenyang Institute of EngineeringShenyangPeople’s Republic of China

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