Title: Preparation of Ti-Ce-Zr-O_x complex catalyst and its performance for selective catalytic reduction of NO
Abstract: Series of Ti-Ce-Zr-Ox catalytic complex oxides were prepared by chemical blend for selective catalytic reduction(SCR) of NO.The crystal form,pore structure and crystalline morphology of the catalysts were characterized by X-ray diffraction(XRD),N2 physical adsorption(BET) and scanning electron microscope(SEM) respectively;the effect of temperature,space velocity,H2O vapor and SO2 on NH3-SCR of NO was also investigated.Results showed that TiCe0.1Zr0.1O2.4 complex catalysts had high activity in the broad temperature range of 200-350 ℃,the NO conversion rate could maintain more than 70%.The catalyst achieved the highest SCR capacity at 300 ℃ with the corresponding NO conversion rate was 92.70%.The maximum NO conversion rate,which decreased with increasing space velocity was transferred to high temperature direction at space velocity of 10 000 h-1.Higher space velocity could decrease NO conversion obviously in low temperature zone,while the tendency was not obvious in high temperature zone.The presence of SO2 increased the catalyst activity significantly when the temperature was below 350 ℃ and the maximum NO conversion rate could reach to 98.23%.H2O vapor could inhibit the activity of catalyst in 150-400 ℃,the maximum NO conversion rate only reach at 47.43%.The presence of both H2O and SO2 could poisoned the catalyst in low temperature(100-250 ℃) with NO conversion rate ranged 1%-3%,the activity of the catalyst was recovered at 300 ℃ and optimized at 350 ℃,then the NO conversion rate achieved 76.11%.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot