Qian Li1, Haibo Liu 1, Tianhu Chen 1, Dong Chen1, Changai Zhang1, Bin Xu1, Chengzhu Zhu1, Yang Jiang2

  • 1 Laboratory for Nanomineral and Environmental Material, School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China
  • 2 School of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009, China

Received: July 11, 2017
Revised: August 18, 2017
Accepted: August 20, 2017
Download Citation: ||https://doi.org/10.4209/aaqr.2017.07.0229  

  • Download: PDF


Cite this article:
Li, Q., Liu, H., Chen, T., Chen, D., Zhang, C., Xu, B., Zhu, C. and Jiang, Y. (2017). Characterization and SCR Performance of Nano-Structured Iron-Manganese Oxides: Effect of Annealing Temperature. Aerosol Air Qual. Res. 17: 2328-2337. https://doi.org/10.4209/aaqr.2017.07.0229


HIGHLIGHTS

  • Nano-structured iron-manganese oxides composite was prepared.
  • Natural Mn-rich limonite is excellent precursor.
  • Mn-rich limonite after annealing at 500°C had the best SCR reactivity.
  • Larger surface area and more surface active sites enhanced the performance.

 

ABSTRACT


Nano-structured iron-manganese oxides composite was prepared by annealing of natural Mn-rich limonite at different temperatures (500, 600, 700, 800°C). Their SCR performances of NO removal by NH3 were evaluated, and SEM, TEM, XRD, XRF, BET, XPS, Raman, NH3-TPD were utilized to analyze the catalytic mechanism. The results indicated that after annealing at 500°C, the as-prepared iron-manganese oxides exhibited the best SCR performance in NO conversion and N2 selectivity (over 80%) at the temperature window of 150–300°C. An increase in annealing temperature from 500 to 800°C significantly increased the particle size resulting in the decrease of surface areas, active sites, and then SCR performances. The experimental results suggested the natural Mn-rich limonite was an excellent precursor for preparing iron-manganese oxides and possessed excellent SCR performance of NO removal by NH3. This study will provide a novel way for the preparation of SCR catalyst and exploit a new application field for natural limonite.


Keywords: Selective catalytic reduction; Natural limonite; Iron-manganese oxides; NO conversion; N2 selectivity


Share this article with your colleagues 

 

Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

7.3
2022CiteScore
 
 
77st percentile
Powered by
Scopus
 
   SCImago Journal & Country Rank

2022 Impact Factor: 4.0
5-Year Impact Factor: 3.4

Call for Papers for the special issue on: "Carbonaceous Aerosols in the Atmosphere"

Aerosol and Air Quality Research partners with Publons

CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit
CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal that promotes submissions of high-quality research and strives to be one of the leading aerosol and air quality open-access journals in the world. We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.