中文摘要：

为研究具有良好活性的低温选择性催化还原催化剂,针对目前Mn基材料低温选择性催化还原脱硝催化剂研究的局限性,以超氧自由基促进光催化为理论基础,N掺杂改N掺杂MnOx/TiO2催化剂,用于锅炉烟气脱硝。提出了氧浓度、[NH3]/[NO]以及空速对脱硝效率的影响,结合X射线衍射表征,获得了N掺杂催化剂的反应工艺参数和相应的晶型变化特性。研究结果表明,N掺杂后,催化剂脱硝活性明显,并对催化剂N掺杂量、Mn负载量及催化剂煅烧温度进行了优化,并对优化结果进行分析。在此基础上,考察了含氧量,得出在O2浓度5%、[NH3]/[NO]为1.2时,空速 28 000 h^-1,反应温度180 ℃的条件下,掺N量为1%以及Mn负载量为5%的N掺杂MnOx/TiO2催化剂的脱硝活性稳定在90%左右。

英文摘要：

In view of the limitations of low-temperature catalysts about MnOx/TiO2, based on the theory of superoxide free radical in the field of photocatalysis, this study proposed a new way for N-doped catalyst by nonmetal materials. N-doped MnOx/TiO2 catalyst with good activity under low temperature was prepared by sol-gel method for titania support, followed by impregnation for MnOxloading. N doping, Mn loading and calcination temperature of the N-doped catalyst were optimized and the results were analyzed by XRD. Based on these results, the effects of O2 concentration, [NH3]/[NO] and GHSV were investigated. The experimental results show that when the reacting mixture contains 5% O2, [NH3]/[NO]=1.2 GHSV？ 28 000 h^-1, the NO conversion of the N-doped MnOx/TiO2 catalyst with 1% N doping and 5% Mn loading is about 90% over 180 ℃.