Abstract
The vanadium oxide/carbon nanotube (VOx/CNTs) composite catalyst was prepared by in-situ growth of VOx nanoparticles on CNTs with a cetylpyridinium chloride (CPC) assisted reflux route. The in-situ prepared catalysts exhibit better NH3-SCR activity in a broader temperature window at low temperature than those prepared by impregnation or a mechanically mixed method. The structural characterizations show that vanadium oxide nanoparticles have a good dispersion on the CNTs surface, with much lower valence vanadium species and chemisorbed oxygen species. The physics-chemistry properties indicate that there is a strong interaction between the VOx and CNTs, and the catalysts present a larger amount of stronger acid. The abovementioned reasons have eventually led to the enhancement of NH3-SCR activity.
Highlights
In order to solve the above problems, vanadium oxide was supported on the surface of the carbon nanotube by in-situ growth because the introduction of carbon nanotubes can improve the low temperature catalytic activity of the catalyst
The VOx were in situ supported on carbon nanotubes (CNTs) by a Cetylpyridinium Chloride (CPC) assisted reflux route
It was found that the in situ prepared catalyst exhibited better NH3-Selective catalytic reduction (SCR) activity at low temperature, better stability, higher SO2-tolerance and improved water-resistance than that of the catalysts prepared by impregnation or a mechanically mixed method
Summary
In order to solve the above problems, vanadium oxide was supported on the surface of the carbon nanotube by in-situ growth because the introduction of carbon nanotubes can improve the low temperature catalytic activity of the catalyst. The in situ synthesis method can enhance the interaction between VOx and the carrier, enhancing the dispersion of VOx. In our work, the VOx were in situ supported on carbon nanotubes (CNTs) by a Cetylpyridinium Chloride (CPC) assisted reflux route.
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