Scholarlink

<p>Alkali metals have severe detrimental effects on the SCR catalytic activity of V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub>. Ce-modified is one of the more effective catalyst modification strategies currently available. Based on this, CeVWTi catalysts doped with different amounts of Nb were prepared and the resistance to alkali metals was tested to explore feasible solutions for mitigating alkali metal poisoning. The activity test results indicated that the doping of Nb had significant effects on the catalytic activity and alkali metal tolerance. The NO conversion of Nb<sub>0.06</sub>CeVWTi reached 72.6% at 300&#xa0;°C with a GHSV of 2 × 10<sup>5</sup> h<sup>− 1</sup>, which was 16.6% higher than that of the CeVWTi. After being poisoned by 1 wt% KCl, Nb<sub>0.06</sub>CeVWTi still maintained 99.2% NO conversion at 350&#xa0;°C. Characterization results showed that the redox capability of Nb<sub>0.06</sub>CeVWTi was improved, and Nb<sub>0.06</sub>CeVWTi maintained the redox performance to the maximum extent even after KCl loading.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Study on the SCR Activity and Resistance To Alkali Metal Poisoning of Nb-doped CeVWTi Catalyst

  • 期刊论文

  • 发表日期：

    2025年7月17日

查看全文
  • Jiahao Wei,
  • Gonggang Sun,
  • Tianzhu Shao,
  • Mingyong Hou,
  • Qi Wang,
  • Xinbao Li

摘要

Alkali metals have severe detrimental effects on the SCR catalytic activity of V2O5-WO3/TiO2. Ce-modified is one of the more effective catalyst modification strategies currently available. Based on this, CeVWTi catalysts doped with different amounts of Nb were prepared and the resistance to alkali metals was tested to explore feasible solutions for mitigating alkali metal poisoning. The activity test results indicated that the doping of Nb had significant effects on the catalytic activity and alkali metal tolerance. The NO conversion of Nb0.06CeVWTi reached 72.6% at 300 °C with a GHSV of 2 × 105 h− 1, which was 16.6% higher than that of the CeVWTi. After being poisoned by 1 wt% KCl, Nb0.06CeVWTi still maintained 99.2% NO conversion at 350 °C. Characterization results showed that the redox capability of Nb0.06CeVWTi was improved, and Nb0.06CeVWTi maintained the redox performance to the maximum extent even after KCl loading.

Graphical Abstract