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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 (V_2O_5 / CNTs) catalysts in the selective catalytic reduction (SCR) of NO with NH_3 at low temperatures (<250 ° C) was investigated. These 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 enhanced 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 shows 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.