摘要
采用涂覆法在堇青石蜂窝陶瓷上负载Ce元素改性的V_2O_5-Mo O_3/Ti O_2脱硝催化剂。首先对涂覆浆料的固含量与粘度的关系及涂覆浆料中有机粘结剂的选择做了研究与优化,筛选出最佳的固含量及有机粘结剂。其次,研究了在V_2O_5-Mo O_3/Ti O_2脱硝催化剂中添加Ce元素后的脱硝催化活性。采用扫描电镜(SEM)、X射线衍射(XRD)等手段对其微观形貌和晶型进行了表征。结果表明:固含量为32%,羧甲基纤维素钠作为有机粘结剂时,催化剂粉体上载率高,涂层牢固不易脱落。与V_2O_5-Mo O_3/Ti O_2相比,V_2O_5-Mo O_3-Ce O_x/Ti O_2在180~260℃的中低温脱硝活性显著提高,活性温度窗口明显拓宽。
The V_2O_5-Mo O_3-Ce Ox/TiO_2 catalyst was coated on the cordierite honeycomb ceramics by a coating method.Firstly,the relationship between the solid content and the viscosity of the coating slurry and the choice of the organic binder in the coating slurry were studied and optimized,and the best solid content and the organic binder were screened out.Secondly,the catalytic activity of denitration in V_2O_5-Mo O_3-Ce O_x/TiO_2 catalyst was studied.The morphology and the crystal forms were characterized by scanning electron microscopy(SEM),and X-ray diffraction(XRD).The results show that when the solid content is 32%,sodium carboxymethyl cellulose is used as the organic binder,the loading rate of the catalyst powder is high and the coating is firm.Compared with V_2O_5-Mo O_3/TiO_2,the denitrification activity of V_2O_5-Mo O_3-Ce O_x/TiO_2 at 180~260°C is significantly improved,and the active temperature window is obviously broadened.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2018年第S1期222-225,共4页
Rare Metal Materials and Engineering
