Novel TiO2 catalyst carriers with high thermostability for selective catalytic reduction of NO by NH3

Novel TiO2 catalyst carriers with high thermostability for selective catalytic reduction of NO by NH3

A series of TiO2 catalyst carriers with ceria additives were prepared by a precipitation method and tested for selective catalytic reduction (SCR) of NO by NH3. These samples were characterized by XRD, N2-BET, NH3-TPD, H2-TPR, TEM, XPS and in situ DRIFTS, respectively. Results showed that the approp...

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Veröffentlicht in:Catalysis today. - 1998. - 327(2019) vom: 01. Mai, Seite 279-287
1. Verfasser: Jin, Qijie (VerfasserIn)
Weitere Verfasser: Shen, Yuesong, Ma, Lei, Pan, Youchun, Zhu, Shemin, Zhang, Jie, Zhou, Wan, Wei, Xiaofeng, Li, XiuJun
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Catalysis today
Schlagworte:Journal Article TiO2 catalyst carrier cerium oxide nitrogen oxide reduction selective catalytic thermostability
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520 |a A series of TiO2 catalyst carriers with ceria additives were prepared by a precipitation method and tested for selective catalytic reduction (SCR) of NO by NH3. These samples were characterized by XRD, N2-BET, NH3-TPD, H2-TPR, TEM, XPS and in situ DRIFTS, respectively. Results showed that the appropriate addition of ceria can enhance the catalytic activity and thermostability of TiO2 catalyst carriers significantly. The maximum catalytic activity of Ti-Ce-Ox-500 is 98.5% at 400 °C with a GHSV of 100 000 h-1 and the high catalytic activity still remains even after the treatment at high temperature for 24 h. The high catalytic performance of Ti-Ce-Ox-500 can be attributed to a series of superior properties, such as larger specific surface area, more Brønsted acid sites, more hydrogen consumption, and the higher proportion of chemisorbed oxygen. Ceria atoms can inhibit the crystalline grain growth and the collapse of small channels caused by high temperatures. Furthermore, in situ DRIFTS in different feed gases show that the SCR reaction over Ti-Ce-Ox-500 follows both E-R and L-H mechanisms 
650 4 |a Journal Article 
650 4 |a TiO2 
650 4 |a catalyst carrier 
650 4 |a cerium oxide 
650 4 |a nitrogen oxide 
650 4 |a reduction 
650 4 |a selective catalytic 
650 4 |a thermostability 
700 1 |a Shen, Yuesong  |e verfasserin  |4 aut 
700 1 |a Ma, Lei  |e verfasserin  |4 aut 
700 1 |a Pan, Youchun  |e verfasserin  |4 aut 
700 1 |a Zhu, Shemin  |e verfasserin  |4 aut 
700 1 |a Zhang, Jie  |e verfasserin  |4 aut 
700 1 |a Zhou, Wan  |e verfasserin  |4 aut 
700 1 |a Wei, Xiaofeng  |e verfasserin  |4 aut 
700 1 |a Li, XiuJun  |e verfasserin  |4 aut 
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773 1 8 |g volume:327  |g year:2019  |g day:01  |g month:05  |g pages:279-287 
856 4 0 |u http://dx.doi.org/10.1016/j.cattod.2018.04.038  |3 Volltext 
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