Template-free synthesis of mesoporous Mn 3 O 4 -Al 2 O 3 catalyst for low temperature selective catalytic reduction of NO with NH 3

研究成果: Article

摘要

Mesoporous Mn 3 O 4 -Al 2 O 3 catalyst with highly dispersed Mn 3 O 4 and a high surface area is prepared using a one-pot synthesis technique without any templates. The synthesis procedure is environmentally friendly due to the low concentration of residual metal ions in the filtered solution, which allows for its direct release without further processing. The results show that the presence of Mn 2+ ions stabilizes the Al(OH) 3 crystal phase during hydrothermal treatment and prevents the formation of the AlOOH phase otherwise observed in the absence of Mn 2+ ions. Because of the high stability of the resulted Mn 3 O 4 -Al(OH) 3 nanoplatelets, a mesoporous Mn 3 O 4 -Al 2 O 3 structure was formed via the dehydration of the Al(OH) 3 after high-temperature calcination. The catalytic efficiencies of the Mn 3 O 4 -Al 2 O 3 catalysts in the low-temperature selective catalytic reduction of NO with NH 3 are examined under various reaction temperatures in the range of 80–200 °C. The results show that the NO conversion reaches as much as 94% at a reaction temperature of 80 °C. The proposed synthesis method thus holds considerable promise for the green, low-cost and scalable production of highly mesoporous Al 2 O 3 -based catalysts.

原文English
頁(從 - 到)627-633
頁數7
期刊Journal of the Taiwan Institute of Chemical Engineers
96
DOIs
出版狀態Published - 2019 三月

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

指紋 深入研究「Template-free synthesis of mesoporous Mn <sub>3</sub> O <sub>4</sub> -Al <sub>2</sub> O <sub>3</sub> catalyst for low temperature selective catalytic reduction of NO with NH <sub>3</sub>」主題。共同形成了獨特的指紋。

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