Next Article in Journal
Analysis of Mass Transport through Anisotropic, Catalytic/Bio-Catalytic Membrane Reactors
Previous Article in Journal
Tailoring a Soluble Diiron Monooxygenase for Synthesis of Aromatic N-oxides
Article Menu

Export Article

Open AccessArticle
Catalysts 2019, 9(4), 357; https://doi.org/10.3390/catal9040357

Effect of Organic Assistant on the Performance of Ceria-Based Catalysts for the Selective Catalytic Reduction of NO with Ammonia

Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
*
Authors to whom correspondence should be addressed.
The first two authors contributed equally to this work and are joint first authors.
Received: 27 February 2019 / Revised: 3 April 2019 / Accepted: 8 April 2019 / Published: 12 April 2019
(This article belongs to the Section Environmental Catalysis)
  |  
PDF [4333 KB, uploaded 21 April 2019]
  |     |  

Abstract

In the present study, a series of CeO2/TiO2 catalysts were fabricated by dry ball milling method in the absence and presence of organic assistants, and their catalytic performances for the selective catalytic reduction (SCR) of NO by NH3 were investigated. It was found that the addition of organic assistants in the ball milling process and the calcining ambience exerted a significant influence on the catalytic performances of CeO2/TiO2 catalysts. The nitrogen sorption isotherm measurement (BET), powder X-ray diffraction (XRD), Raman spectra, high-resolution transmission electron microscopy (HR-TEM), hydrogen temperature-programmed reduction (H2-TPR), ammonia temperature-programmed desorption (NH3-TPD), sulfur dioxide temperature-programmed desorption (SO2-TPD), thermogravimetric analysis (TG), Fourier transform infrared (FT-IR) and X-ray photoelectron spectra (XPS) characterizations showed that the introduction of citric acid in the ball milling process could significantly change the decomposition process of the precursor mixture, which can lead to improved dispersion and reducibility of cerium species, surface acidity as well as the surface microstructure, all which were responsible for the high low temperature activity of CeTi-C-N in an NH3-SCR reaction. In contrast, the addition of sucrose in the milling process showed an inhibitory effect on the catalytic performance of CeO2/TiO2 catalyst in an NH3-SCR reaction, possibly due to the decrease of the crystallinity of the TiO2 support and the carbon residue covering the active sites. View Full-Text
Keywords: selective catalytic reduction (SCR); ceria-based catalysts; organic assistant; ball milling selective catalytic reduction (SCR); ceria-based catalysts; organic assistant; ball milling
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Huang, X.; Li, S.; Qiu, W.; Chen, Y.; Cheng, J.; Sun, Y.; Bai, G.; Song, L.; Zhang, G.; He, H. Effect of Organic Assistant on the Performance of Ceria-Based Catalysts for the Selective Catalytic Reduction of NO with Ammonia. Catalysts 2019, 9, 357.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Catalysts EISSN 2073-4344 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top