Promotional effects of carbon nanotubes on V2O5/TiO2 for NOx removal

• Published in: Journal of hazardous materials 2011-08, Vol.192 (2), p.915-921
• Main Authors: Li, Qian, Yang, Hangsheng, Qiu, Famin, Zhang, Xiaobin
• Format: Article
• Language: English
• Subjects: Adsorption; Applied sciences; Atmospheric pollution; Catalysis; Catalysts; Catalytic reactions; Chemical engineering; Chemistry; Exact sciences and technology; General and physical chemistry; General processes of purification and dust removal; Microscopy, Electron, Scanning; Nanostructure; Nanotubes, Carbon; Nitrogen dioxide; Nitrogen Oxides - isolation & purification; Oxidation-Reduction; Pollution; Prevention and purification methods; Reactors; Reduction; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Titanium - chemistry; Titanium dioxide; Vanadium Compounds - chemistry; Vanadium pentoxide; X-Ray Diffraction; X-rays
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2011.05.101

A series of V(2)O(5)/TiO(2)-carbon nanotube (CNT) catalysts were synthesized by sol-gel method, and their activities for NO(X) removal were compared. A catalytic promotional effect was observed by adding CNTs to V(2)O(5)/TiO(2). The catalyst V(2)O(5)/TiO(2)-CNTs (10wt.%) showed an NO(X) removal efficiency of 89% at 300°C under a GHSV of 22,500h(-1). Based on X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, NH(3)-temperature-programmed desorption, temperature-programmed reduction, Brunauer-Emmett-Teller surface area measurements, differential scanning calorimetry, and thermogravimetric analysis, the increased acidity and reducibility, which could promote NH(3) adsorption and oxidation of NO to NO(2), respectively, contributed to this promotion.