摘要
The catalytic activity of carbon nanotubes-supported vanadium oxide(V_2O_5/CNTs) catalysts in the selective catalytic reduction(SCR) of NO with NH_3 at low temperatures(<250℃) was investigated.The effects of V_2O_5loading,reaction temperature,and presence of SO_2 on the SCR activity were evaluated.The results show that V_2O_5/CNTs catalysts exhibit high activity for NO reduction with NH_3 at low-temperatures.The catalysts also show very high stability in the presence of SO_2.More interestingly,their activities are significantly promoted instead of being poisoned by SO_2.The promoting effect of SO_2 is distinctly associated with V_2O_5 loading,particularly maximized at low V_2O_5 loading,which indicated the role of CNTs support in this effect.The promoting effect of SO_2 at low temperatures suggests that V_2O_5/CNTs catalysts are promising catalytic materials for low-temperature SCR reactions.
The catalytic activity of carbon nanotubes-supported vanadium oxide（V2O5/CNTs） catalysts in the selective catalytic reduction（SCR） of NO with NH3 at low temperatures（〈250℃） was investigated.The effects of V2O5loading,reaction temperature,and presence of SO2 on the SCR activity were evaluated.The results show that V2O5/CNTs catalysts exhibit high activity for NO reduction with NH3 at low-temperatures.The catalysts also show very high stability in the presence of SO2.More interestingly,their activities are significantly promoted instead of being poisoned by SO2.The promoting effect of SO2 is distinctly associated with V2O5 loading,particularly maximized at low V2O5 loading,which indicated the role of CNTs support in this effect.The promoting effect of SO2 at low temperatures suggests that V2O5/CNTs catalysts are promising catalytic materials for low-temperature SCR reactions.
基金
Supported by the National Natural Science Foundation of China(21006065)
the Zhejiang Provincial Natural Science Foundation of China(Y5100009)
