Effect of metal oxide partial substitution of V2O5 in V2O5–WO3/TiO2 on selective catalytic reduction of NO with NH3

After partial substitution of V2O5 in V2O5–WO3/TiO2 by metal oxide (MxOy, M=Fe, Co, Ni, Cu, Sr, La, and Ce), the NO conversions for the MxOy–V2O5–WO3/TiO2 catalysts (M-VW) showed the following sequence: Co–VW>Fe–VW>Sr-VW≈Ce-VW≈La-VW>VW>Ni-VW>Cu-VW. The reduction activities for almost...

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Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2015, 24(0), , pp.79-86
Main Authors: Zhang, Qing-mao, Song, Chong-lin, Lv, Gang, Bin, Feng, Pang, Hua-ting, Song, Jin-ou
Format: Article
Language:English
Subjects:
Catalytic activity
Metal oxide
Nitric oxide
Selective catalytic reduction
V2O5–WO3–TiO2
화학공학
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cited_by cdi_FETCH-LOGICAL-c403t-5a54592424b4a160ebb34c610d1696238bd74bcc88b9cd2e5cbfb46cb3a09fbc3
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description After partial substitution of V2O5 in V2O5–WO3/TiO2 by metal oxide (MxOy, M=Fe, Co, Ni, Cu, Sr, La, and Ce), the NO conversions for the MxOy–V2O5–WO3/TiO2 catalysts (M-VW) showed the following sequence: Co–VW>Fe–VW>Sr-VW≈Ce-VW≈La-VW>VW>Ni-VW>Cu-VW. The reduction activities for almost all the M-VW catalysts were enhanced at reaction temperature >400°C, but only the Co-VW catalyst showed an increased activity at temperature
doi_str_mv 10.1016/j.jiec.2014.09.012
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The reduction activities for almost all the M-VW catalysts were enhanced at reaction temperature &gt;400°C, but only the Co-VW catalyst showed an increased activity at temperature &lt;400°C. Among the M-VW catalysts tested, the Co-VW sample had the highest catalytic activity with a temperature range of 300–550°C for more than 90% NO removal at a GHSV of 60000h−1. Moreover, the Co-VW sample exhibited high space-velocity, H2O and SO2 resistance, and low N2O yield. Co partial substitution for V in the VW led to more Lewis acid sites and Brønsted acid sites, and an obvious increase in the ratio of the adsorbed oxygen to the lattice oxygen from 12.74% for VW to 36.73% for Co-VW. 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The reduction activities for almost all the M-VW catalysts were enhanced at reaction temperature &gt;400°C, but only the Co-VW catalyst showed an increased activity at temperature &lt;400°C. Among the M-VW catalysts tested, the Co-VW sample had the highest catalytic activity with a temperature range of 300–550°C for more than 90% NO removal at a GHSV of 60000h−1. Moreover, the Co-VW sample exhibited high space-velocity, H2O and SO2 resistance, and low N2O yield. Co partial substitution for V in the VW led to more Lewis acid sites and Brønsted acid sites, and an obvious increase in the ratio of the adsorbed oxygen to the lattice oxygen from 12.74% for VW to 36.73% for Co-VW. The increased adsorbed oxygen and Lewis and Brønsted acid sites contributed to the improved SCR activity of the Co-VW sample.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.jiec.2014.09.012</doi><tpages>8</tpages></addata></record>
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subjects Catalytic activity
Metal oxide
Nitric oxide
Selective catalytic reduction
V2O5–WO3–TiO2
화학공학
title Effect of metal oxide partial substitution of V2O5 in V2O5–WO3/TiO2 on selective catalytic reduction of NO with NH3
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