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<p>In this study, the positive effect of EuO<sub><i>x</i></sub> addition on the SCR performance of the MnCo<sub>2</sub>O<sub>4</sub> spinel catalyst was investigated. The pristine MnCo<sub>2</sub>O<sub>4</sub> catalyst proved ineffective in eliminating NO<sub><i>x</i></sub> from the simulated gas stream, with NO<sub><i>x</i></sub> conversion remaining below 90% throughout the entire temperature range examined. The introduction of EuO<sub><i>x</i></sub>, however, improved the deNO<sub><i>x</i></sub> performance of the catalysts. At an Eu/Mn molar ratio of 0.2, the temperature window for achieving &gt; 90% NO<sub><i>x</i></sub> conversion was expanded by 100&#xa0;°C. The improved deNO<sub><i>x</i></sub> performance observed for the EuO<sub><i>x</i></sub>-modified catalysts can be attributed to a combination of factors: increased specific surface area, developed porosity, enhanced surface acidity and oxidizability, and improved reactivity of reaction intermediates. Furthermore, the EuO<sub><i>x</i></sub>-doped catalyst exhibited enhanced sulfur tolerance, highlighting its potential for practical engineering applications.</p>

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Boosting the selective catalytic reduction performance of the MnCo2O4 spinel catalysts by the addition of EuOx

  • 期刊论文

  • 发表日期：

    2026年4月19日

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  • Dan Zhang,
  • Yun-wei Xu,
  • Yi-zhen Dong,
  • Dong Ye,
  • Xiaolong Tang,
  • Yao-yu Zhang,
  • Hao Wu,
  • Rui-tang Guo

摘要

In this study, the positive effect of EuOx addition on the SCR performance of the MnCo2O4 spinel catalyst was investigated. The pristine MnCo2O4 catalyst proved ineffective in eliminating NOx from the simulated gas stream, with NOx conversion remaining below 90% throughout the entire temperature range examined. The introduction of EuOx, however, improved the deNOx performance of the catalysts. At an Eu/Mn molar ratio of 0.2, the temperature window for achieving > 90% NOx conversion was expanded by 100 °C. The improved deNOx performance observed for the EuOx-modified catalysts can be attributed to a combination of factors: increased specific surface area, developed porosity, enhanced surface acidity and oxidizability, and improved reactivity of reaction intermediates. Furthermore, the EuOx-doped catalyst exhibited enhanced sulfur tolerance, highlighting its potential for practical engineering applications.