A superior Fe-V-Ti catalyst with high activity and SO2 resistance for the selective catalytic reduction of NOx with NH3

Na Zhu; Wenpo Shan; Zhihua Lian; Yan Zhang; Kuo Liu; Hong He

doi:10.1016/j.jhazmat.2019.120970

A superior Fe-V-Ti catalyst with high activity and SO₂ resistance for the selective catalytic reduction of NO_x with NH₃

J Hazard Mater. 2020 Jan 15:382:120970. doi: 10.1016/j.jhazmat.2019.120970. Epub 2019 Aug 9.

Authors

Na Zhu¹, Wenpo Shan², Zhihua Lian³, Yan Zhang⁴, Kuo Liu⁵, Hong He⁶

Affiliations

¹ Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
² Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Ningbo Urban Environment Observation and Research Station-NUEORS, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China. Electronic address: [email protected].
³ Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
⁴ Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Ningbo Urban Environment Observation and Research Station-NUEORS, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China.
⁵ State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
⁶ Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China; Ningbo Urban Environment Observation and Research Station-NUEORS, Institute of Urban Environment, Chinese Academy of Sciences, Ningbo 315800, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.

PMID: 31465945
DOI: 10.1016/j.jhazmat.2019.120970

Abstract

A series of Fe-V-Ti oxide catalysts were prepared by a co-precipitation method, among which the Fe_0.1V_0.1TiO_x catalyst showed the optimal NH₃-SCR performance and excellent SO₂ resistance. Fe_0.1V_0.1TiO_x achieved > 90% NO_x conversion at 225-450 °C under a GHSV of 200,000 h^-1. When introducing SO₂ and H₂O to the SCR reaction for 24 h, the NO_x conversion maintained a level above 93% at 250 °C. The Raman and Mössbauer spectra showed that FeVO₄ and Fe₂O₃ coexisted on the surface of TiO₂. In Fe-V-Ti catalysts, the charge interaction between Fe₂O₃ and FeVO₄ as well as the electronic inductive effect between Fe and V species resulted in the improvement of SCR activity and N₂ selectivity at high temperatures. The NH₃-SCR process on the Fe_0.1V_0.1TiO_x catalyst mainly followed the Eley-Rideal (E-R) reaction mechanism with gaseous NO reacting with adsorbed NH₃ adsorbed species.

Keywords: Fe-V-Ti catalysts; NH(3)-SCR; Reaction mechanism; SO(2) resistance.

Publication types

Research Support, Non-U.S. Gov't