摘要
本文通过实验研究不同温度、不同烟气氛围以及不同催化剂组分/结构协同作用下催化剂的活性及其变化规律。首先分析了TiO<sub>2</sub>基钒-钛催化剂在不同温度和气体协同作用下的催化活性特点,结果显示在350℃至450℃下两种钒-钛催化剂样品的脱硝效率均高于95%;在300<sup>3</sup>50℃下通入SO<sub>2</sub>和水蒸气条件下,高比表面高空隙率蜂窝状钒-钛催化剂样品催化活性较高,具有较好的抗硫中毒性。进一步深入研究TiO<sub>2</sub>基蜂窝状催化剂结构体系中钒和钨含量对催化剂活性调控的影响,实验结果发现钒的含量低于0.5%时,催化剂的活性随钒的含量增加而增加;而钒含量为一定时,催化剂活性在随着钨的含量增加,尤其在高温区域,有了较大的提高。研究结果将为脱硝催化剂的升级和催化脱硝工艺的优化提供实验基础数据。
This work focused on the activity and the change trend using experimental method under the different temperature,flue gas atmosphere and catalyst component & structure.Firstly,the performances of TiO_2-based vanadium-titanium catalyst under different temperature and gas were analyzed,which showed that the catalytic DeNO_x efficiency of the two prepared catalyst is higher than 95%at the range of 350??450?.The honeycombed catalyst with high specific surface and high void ratio presents higher catalytic activity and can be resistant to sulfur poisoning under the condition introducing SO_2 and vapour at 300 ??350?.Further,the influences of vanadium-wolfram content on the DeNO_x activity of such TiO_2-based honeycombed catalyst were investigated in details.Results showed that the DeNO_x activity increased with the increase of vanadium content,and it also increased(especially at higher temperature) with the increase of wolfram content under a certain vanadium content.Results provided fundamental experimental data for promoting the development of such TiO_2-based vanadium catalyst system and the optimization of catalytic DeNOx process.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2014年第5期1030-1033,共4页
Journal of Engineering Thermophysics
基金
生物质发电成套设备国家工程实验室开放基金(No.KZ0015)
北京市自然科学基金资助项目(No.3132017)
