Sb-loaded MnOx/TiO2/CNTs catalysts for selective catalytic reduction of NOx: insight to the SO2 and H2O tolerance

IF 1.2 4区工程技术 Q3 ENGINEERING, AEROSPACE

Aircraft Engineering and Aerospace Technology Pub Date : 2024-07-05 DOI:10.1108/aeat-11-2023-0299

S. Natarajan, Raja S., Pitchandi K., Sivachandiran Loganathan

{"title":"Sb-loaded MnOx/TiO2/CNTs catalysts for selective catalytic reduction of NOx: insight to the SO2 and H2O tolerance","authors":"S. Natarajan, Raja S., Pitchandi K., Sivachandiran Loganathan","doi":"10.1108/aeat-11-2023-0299","DOIUrl":null,"url":null,"abstract":"<h3>Purpose</h3>\n<p>This paper aims to synthesize and test Mn-Sb/TiO<sub>2</sub>-CNT catalysts with different Sb/Mn molar ratios to be used in NH<sub>3</sub>-SCR reaction.</p>\n<h3>Design/methodology/approach</h3>\n<p>A series of Sb-loaded carbon nanotubes (CNTs)-based Mn/TiO<sub>2</sub> catalysts were prepared by the incipient wetness co-impregnation method and tested for the selective catalytic reduction (SCR) of NOx with NH<sub>3</sub>.</p>\n<h3>Findings</h3>\n<p>The Sb-loaded Mn/TiO<sub>2</sub>-CNTs catalyst outperformed other catalysts and presented the highest activity in the temperature regime of 100–400°C. The catalyst loaded with Sb also showed good SO<sub>2</sub> and H<sub>2</sub>O resistance and exhibited better thermal stability. A stepwise study of SO<sub>2</sub> addition evidenced that Mn-Sb/TiO<sub>2</sub>-CNTs catalyst exhibited better SO<sub>2</sub> resistance than the base catalyst Mn/TiO<sub>2</sub>, where the Sb doping greatly inhibited the sulphating of active phase of the catalyst.</p>\n<h3>Originality/value</h3>\n<p>In Sb-loaded catalysts, the formed SOx species fused with SbOx instead of MnOx. This favoured interaction of SO<sub>2</sub> with SbOx successfully prevents the MnOx from being sulphated by SO<sub>2</sub> which substantially improves the SO<sub>2</sub> tolerance of Sb-loaded catalysts.</p>","PeriodicalId":55540,"journal":{"name":"Aircraft Engineering and Aerospace Technology","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aircraft Engineering and Aerospace Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1108/aeat-11-2023-0299","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, AEROSPACE","Score":null,"Total":0}

引用次数: 0

Abstract

Purpose

This paper aims to synthesize and test Mn-Sb/TiO₂-CNT catalysts with different Sb/Mn molar ratios to be used in NH₃-SCR reaction.

Design/methodology/approach

A series of Sb-loaded carbon nanotubes (CNTs)-based Mn/TiO₂ catalysts were prepared by the incipient wetness co-impregnation method and tested for the selective catalytic reduction (SCR) of NOx with NH₃.

Findings

The Sb-loaded Mn/TiO₂-CNTs catalyst outperformed other catalysts and presented the highest activity in the temperature regime of 100–400°C. The catalyst loaded with Sb also showed good SO₂ and H₂O resistance and exhibited better thermal stability. A stepwise study of SO₂ addition evidenced that Mn-Sb/TiO₂-CNTs catalyst exhibited better SO₂ resistance than the base catalyst Mn/TiO₂, where the Sb doping greatly inhibited the sulphating of active phase of the catalyst.

Originality/value

In Sb-loaded catalysts, the formed SOx species fused with SbOx instead of MnOx. This favoured interaction of SO₂ with SbOx successfully prevents the MnOx from being sulphated by SO₂ which substantially improves the SO₂ tolerance of Sb-loaded catalysts.

查看原文本刊更多论文

用于选择性催化还原氮氧化物的锑负载锰氧化物/二氧化钛/碳纳米管催化剂：对二氧化硫和水的耐受性的见解

目的本文旨在合成和测试不同 Sb/Mn 摩尔比的 Mn-Sb/TiO2-CNT 催化剂，以用于 NH3-SCR 反应。研究结果负载锑的 Mn/TiO2-CNTs 催化剂性能优于其他催化剂，在 100-400°C 温度范围内活性最高。负载锑的催化剂还具有良好的抗二氧化硫和 H2O 性能，并表现出更好的热稳定性。对二氧化硫添加的逐步研究表明，Mn-Sb/TiO2-CNTs 催化剂比基础催化剂 Mn/TiO2 具有更好的抗二氧化硫性能，其中 Sb 的掺杂极大地抑制了催化剂活性相的硫化。二氧化硫与氧化锰的这种有利相互作用成功地防止了氧化锰被二氧化硫硫化，从而大大提高了掺锑催化剂对二氧化硫的耐受性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Aircraft Engineering and Aerospace Technology 工程技术-工程：宇航

CiteScore

3.20

自引率

13.30%

发文量

168

审稿时长

8 months

期刊介绍： Aircraft Engineering and Aerospace Technology provides a broad coverage of the materials and techniques employed in the aircraft and aerospace industry. Its international perspectives allow readers to keep up to date with current thinking and developments in critical areas such as coping with increasingly overcrowded airways, the development of new materials, recent breakthroughs in navigation technology - and more.