On the promotional effect of Sn in Co-Sn/Al2O3 catalyst for NO selective reduction
作者： Laiyuan Chen , Tatsuro Horiuchi , Toshiaki Mori
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摘要: NO reduction with propylene over Co/Al2O3 and Co–Sn/Al2O3 catalysts has been investigated. For the catalyst, a calcination temperature exceeding 800 °C led to decrease of conversion. Calcination catalyst at 1000 resulted in formation α-Al2O3 Co3O4. The presence 20% water vapor showed significant shift for maximum from 450 600 Co/Al2O3. It found that modification 6 wt% 2 Sn significantly enhanced thermal stability improved inhibitory effect on conversion reaction temperature. promotional was attributed suppression phase transformation highly dispersed Co2+ species γ-Al2O3 smaller influence Co–Sn/Al2O3, compared Co/Al2O3, dispersion as well involvement relatively lower synergetic between octahedral γ-alumina plays role catalysis selective by C3H6.
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