Mn-Ce/Ti-Zr-柱撑膨润土催化剂低温选择性催化还原法脱硝

摘要

Using the modified organic clay as raw matieral, Ti-Zr co-pillared organic clay(Ti-Zr-OPILC) was prepared, and then loaded with Mn and Ce by impregnation method to prepare the catalyst of Mn-Ce/ Ti-Zr-OPILC. The catalyst was characterized by XRD and BET, Its catalytic activity for NO selective catalytic reduction at low temperature was studied. The experimental results show that: The specific surface area of the catalyst is greatly increased and the dispersion of Mn and Ce on the carrier is good; When the reaction temperature is 220℃, the volume space velocity is 40 000 h-1, n(NH3) :n(NO)=1, the initial volume fractions of NO and O2 are 0.06% and 3.6% respectively, the removal rate of NO can reach over 95%.%以改性的有机膨润土为原料,制备Ti、Zr共柱撑有机膨润土(Ti-Zr-OPILC),并通过浸渍法负载Mn、Ce,制备得催化剂Mn-Ce/Ti-Zr-OPILC,运用XRD、BET分析了催化剂的物理化学特性,并考察了催化剂对NO低温选择性催化还原反应的催化活性.实验结果表明:催化剂的比表面积得到很大提高,Mn和Ce在载体上分散性较好；在反应温度为220℃、体积空速为40 000 h-1、n(NH3)∶n(NO)为1、初始NO体积分数为0.06％、O2体积分数为3.6％时,对NO去除率高达95％以上.