Probing NH3-SCR catalytic activity and SO2 resistance over aqueous-phase synthesized Ce-W@TiO2 catalyst

LIU Xin; NING Ping; LI Hao; SONG Zhong-xian; WANG Yan-cai; ZHANG Jin-hui; TANG Xiao-su; WANG Ming-zhi; ZHANG Qiu-lin

Volume 44 Issue 2

Feb. 2016

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Article Navigation > Journal of Fuel Chemistry and Technology > 2016 > 44(2): 225-231

LIU Xin, NING Ping, LI Hao, SONG Zhong-xian, WANG Yan-cai, ZHANG Jin-hui, TANG Xiao-su, WANG Ming-zhi, ZHANG Qiu-lin. Probing NH3-SCR catalytic activity and SO2 resistance over aqueous-phase synthesized Ce-W@TiO2 catalyst[J]. Journal of Fuel Chemistry and Technology, 2016, 44(2): 225-231.

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LIU Xin, NING Ping, LI Hao, SONG Zhong-xian, WANG Yan-cai, ZHANG Jin-hui, TANG Xiao-su, WANG Ming-zhi, ZHANG Qiu-lin. Probing NH₃-SCR catalytic activity and SO₂ resistance over aqueous-phase synthesized Ce-W@TiO₂ catalyst[J]. Journal of Fuel Chemistry and Technology, 2016, 44(2): 225-231.

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Probing NH₃-SCR catalytic activity and SO₂ resistance over aqueous-phase synthesized Ce-W@TiO₂ catalyst

Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

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Corresponding author: Tel: +86 871 65170905, E-mail: qiulinzhang_kmust@163.com
Received Date: 2015-09-15
Rev Recd Date: 2015-11-29

Available Online: 2022-03-23

Publish Date: 2016-06-01

Abstract

Abstract

A series of mixed Ce, W and Ti oxides catalysts have been prepared and employed to selective catalytic reduction of NO with ammonia (NH₃-SCR).It was found that Ce-W@TiO₂ exhibited the optimal catalytic activity.Over 90% of NO conversion could be obtained by the surface TiO₂-coated Ce-W@TiO₂ catalyst at 205-515℃.The presence of SO₂ leads to a decrease of low-temperature NO catalytic conversion and an increase of NO conversion above 425℃ over various catalysts, while Ce-W@TiO₂ exhibits the optimal low-temperature SO₂ resistance.It is noted that introducing Ti into Ce-W mixed oxide via the conventional co-precipitation method attributed to the decrease of surface W atomic abundance and acidic sites as well as inferior low-temperature NO conversion and SO₂ resistance.In contrast, the surface TiO₂-coated Ce-W@TiO₂ catalyst prepared via a modified aqueous-phase method exhibit increased surface W atomic abundance and acidic sites as well as the superior low-temperature NO conversion and SO₂ resistance.
- aqueous-phase method,
- NH₃-SCR,
- Ce-W@TiO₂,
- NO conversion,
- SO₂ resistance

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References(29)

References

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