Effect of Calcination Temperature on the Properties of Nano-sized Vanadium Catalyst

Nano-sized vanadium catalysts were prepared under different calcination temperatures,and the micro-morphology,activity,mechanic strength and corrosion resistance of the catalysts were tested and analyzed. The results show that the nano-sized vanadium catalyst prepared at 650 ℃ has the best activity,mechanic strength and corrosion resistance. Under 500 ℃ of the heat-resisting temperature in the activity test,activity of the catalyst with calcination temperature of 650 ℃ increases by 24.6% and 38.6%,compared with that of the catalyst prepared at 500 ℃ and 800 ℃,respectively. The mechanic strength of the catalyst prepared at 650 ℃ is respectively 28.4% and 45.8% higher than that of sample with calcination temperature of 500 ℃ and 800 ℃. Furthermore,the corrosion potential of the nano-sized vanadium catalyst calcined at 650 ℃ positively shifts by 97 mV and 222 mV with comparison to that of the catalyst prepared at 500 ℃ and 800 ℃,respectively.