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Structural sensitivity of NO decomposition over a V-O-W/Ti(Sn)O2 catalyst (CROSBI ID 132772)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Banaś, Joanna ; Tomašić, Vesna ; Wesełucha-Birczyńska, A. ; Najbar, Mieczysława Structural sensitivity of NO decomposition over a V-O-W/Ti(Sn)O2 catalyst // Catalysis today, 119 (2007), 1-4; 199-203. doi: 10.1016/j.cattod.2006.08.043

Podaci o odgovornosti

Banaś, Joanna ; Tomašić, Vesna ; Wesełucha-Birczyńska, A. ; Najbar, Mieczysława

engleski

Structural sensitivity of NO decomposition over a V-O-W/Ti(Sn)O2 catalyst

NO decomposition at 673 K as a function of contact times over a V-O-W/Ti(Sn)O2 catalyst obatined by sol-gel method and pretreated at 673 K in helium stream was investigated and compared with that over a Cu-ZSM-5 catalyst. Feed containing 4 % NO in a helium stream was used in both the cases. The V-O-W/Ti(Sn)O2 catalyst showed higher activity as well as higher selectivity to dinitrogen than the Cu-ZSM-5 catalyst over the whole range of used contact times (0.375-15 g s cm-3). The highest activity of the V-O-W/Ti(Sn)O2 catalyst, especially at higher normalised contact times was shown to result from vanadia-like surface layer formation with high tungsten content. It was also shown that the decrease in activity as contact time decreased is connected with tungsta monolayer formation on the V-O-W hybrid crystallites composed of tungsta, V-W bronze and vanadia.

rutile-supported vanadia-tungsta catalyst ; nitrogen oxide decomposition ; surface species structure

Rad je prezentiran na skupu "Air Pollution Abatement Catalysis (APAC) Symposium", održanom od 21.–24.09.2005., Krakov, Poljska.

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Podaci o izdanju

119 (1-4)

2007.

199-203

objavljeno

0920-5861

1873-4308

10.1016/j.cattod.2006.08.043

Povezanost rada

Kemijsko inženjerstvo

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