期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 324, 期 -, 页码 507-515出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2016.11.019
关键词
Alkaline poisoning; Titanate nanotubes; SCR; Vanadium; Ion-exchange
资金
- National Natural Science Foundation of China [NSFC-1278458]
- National Key Research and Development Plan [2016YFC0204100]
- Zhejiang Provincial 151 Talents Program
- Key Project of Zhejiang Provincial Science & Technology Program
- Program for Zhejiang Leading Team of ST Innovation [2013TD07]
- Natural Science Foundation of Guangdong Province [2015A030313901]
- Changjiang Scholar Incentive Program (Ministry of Education, China)
In this work, protonated titanate nanotubes was performed as a potential useful support and different vanadium precursors (NH4VO3 and VOSO4) were used to synthesize deNO(x) atalysts. The results showed that VOSO4 exhibited better synergistic effect with titanate nanotubes than NH4VO3 which was caused by the ion-exchange reaction. Then high loading content of vanadium, uniformly active phase distribution, better dispersion of vanadium, more acid sites, better V5+/V4+ redox cycles and superior oxygen mobility were achieved. Besides, VOSO4-based titanate nanotubes catalysts also showed enhanced alkaline resistance than particles (P25) based catalysts. It was strongly associated with its abundant acid sites, large surface area, flexible redox cycles and oxygen transfer ability. For the loading on protonated titanate nanotubes, active metal with cation groups was better precursors than anion ones. V2O5/TNTs catalyst was a promising substitute for the commercial vanadium catalysts and the work conducted herein provided a useful idea to design uniformly active phase loaded catalyst. (C) 2016 Elsevier B.V. All right's reserved.
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