摘要
用模具挤出的方法制备了蜂窝式0.98%V2O5-9.65%WO3/TiO2的SCR脱硝催化剂,采用BET、XRD、SEM、XRF等方法对微观结构进行考察。在SCR脱硝试验装置上测试各种条件下催化剂的性能,并与结构类似的商业催化剂进行对比。通过试验发现,在空速比（SV）为4 000 h-1、NH3/NO=0.9-1.0、300-400℃范围内,自制催化剂的NO脱除率、SO2氧化率、N2O生成率和氨逃逸量,与商业催化剂相比性能接近,基本达到商业应用的要求。在水蒸气含量超过5%时对NO脱除率影响不大,因此催化剂适用于实际烟气。试验中未观察到SO2对NO脱除的促进作用。自制催化剂结构强度低于商业催化剂,有待进一步改进。
By employing a die set extrusion method,prepared was a honeycomb type 0.98%V2O5-9.65%WO3/TiO2-contained SCR(selective catalytic reduction) catalyst.By using BET(brunauer-emmett-teller),XRD(X-ray diffractometer),SEM(scanning electron microscope) and XRF(X-ray fluorescence) method etc.,inspected and explored was the microstructure.On a SCR denitration test rig,tested was the performance of the catalyst under various conditions and conducted was a comparison with commercial catalysts having a similar structure.Through tests,it has been found that when the space velocity(SV) equals to 4 000 h-1 and NH3/NO ratio is 0.9 to 1.0 at a temperature within a range from 300 to 400 ℃,under such circumstances,NO removal rate,SO2 oxidation rate,N2O formation rate and ammonia escape quantity of the self-prepared catalyst are comparatively close in performance to those of commercial catalysts,basically meeting the requirements for commercial applications.When the steam content is in excess of 5%,it has little influence on the NO removal rate,thus applicable for practical flue gases.During the tests,it has not been observed that SO2 played a role of promoting the elimination of NO.The structural strength of the self-prepared catalyst is lower than that of the commercial catalysts,necessitating further improvement.
出处
《热能动力工程》
CAS
CSCD
北大核心
2009年第5期639-643,共5页
Journal of Engineering for Thermal Energy and Power
基金
国家高技术研究发展计划(863计划)基金资助项目(2008AA05Z303)
中国博士后科学基金资助项目(2004035090)
