Open Access

ARTICLE

Influence of Steam and Sulfide on High Temperature Selective Catalytic Reduction

by Jiyuan Zhang, Linbo Wang, Chengqiang Zhang, Shuzhan Bai

1 R & D Center, Weichai Power Co. Ltd., Weifang, 261041, China
2 School of Energy and Power Engineering, Shandong University, Jinan, 250061, China

* Corresponding Author: Shuzhan Bai. Email:

(This article belongs to the Special Issue: High-Speed and High-Temperature Flows)

Fluid Dynamics & Materials Processing 2020, 16(3), 615-621. https://doi.org/10.32604/fdmp.2020.09654

Received 14 January 2020; Accepted 24 March 2020; Issue published 25 May 2020

Abstract

The influences of steam and sulfide on the efficiency of NOx reduction using ammonia (NH₃) over the nanometer-class V-W/Ti catalyst in conditions of high temperature is experimentally investigated using a steady-flow reactor. The results showed that selective catalytic reduction (SCR) is inhibited by H₂O at low temperature, but higher NO conversion efficiency is achieved at high temperature since the reaction of NH3 oxidized by O₂ to NOx is inhibited by H₂O. The activity of SCR is promoted by SO₂ in the temperature range of 200~500° C, the NO conversion efficiency was improved to 98% from 94% by adding SO₂. SCR would be improved at 350~500°C when H₂O and SO₂ exist at the same time. Furthermore, the positive influence to the NOx conversion was proved in the presence of H₂O and SO₂ as a result of the European Stationary Cycle test.

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Keywords

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