海泡石纤维在平板式脱硝催化剂中的应用

The application of sepiolite fiber in the plate-type De-NO_(x) catalyst

海泡石纤维是一种常见的矿物材料,已在工业领域有较多应用。制备一系列不同含量的海泡石纤维V-Mo/Ti平板式脱硝催化剂,考察海泡石纤维的添加对平板式催化剂的影响。采用X射线荧光光谱分析仪、X射线衍射仪、扫描电子显微镜、N_(2)-吸附脱附、H_(2)-TPR和NH_(3)-TPD对催化剂进行表征。通过固定床微型反应器,对不同催化剂脱硝效率进行测试。结果表明,添加海泡石纤维,对催化剂的孔结构、载体的晶型影响较小,但能有效提升催化剂的耐磨强度。海泡石纤维的添加造成催化剂还原性能与酸性的降低,对催化剂的脱硝活性产生影响。

Sepiolite fiber is a common mineral material,and has been widely used in industry.In this paper,a series of V-Mo/Ti plate-type De-NO_(x) catalysts with different contents of sepiolite fiber were prep-ared,and the effect of sepiolite fiber on plate-type catalyst was investigated.XRF,XRD,SEM,N_(2) adsorption-desorption,H_(2)-TPR and NH_(3)-TPD were used to characterize the catalysts.The denitration performance of different catalysts was tested in a fixed bed microreactor.The results show that the addition of sepiolite fiber has little effect on the pore structure and crystal shape of the catalyst,but it can effectively improve the attrition strength of the catalyst.With the addition of sepiolite fiber,the reducibility and acidity of the catalyst decreased.As a result,the catalytic performance of the catalyst declined.