开发了两种以铝纤维为骨架,分别担载Cu-ZSM-5和Cu-SSZ-13分子筛的新型微纤结构NH3选择性催化还原脱硝(NH3-SCR)催化剂.微纤整体型催化剂拥有独特的三维网状结构,具有较大的孔隙率,增加了反应的传质能力和活性组分的分散性.活性评价结果表明,两种微纤整体型催化剂较单纯分子筛催化剂均展现出了更加优异的催化活性和抗硫稳定性.动力学计算结果表明,微纤整体型催化剂上反应动力学常数均高于相对应的纯分子筛催化剂,从动力学方面解释了其活性较高的原因.本研究为NH3-SCR催化剂的开发提供了新思路,展现了微纤整体型催化剂在NH3-SCR应用中的巨大潜力.%Aluminum fiber supported Cu-ZSM-5 and Cu-SSZ-13 catalysts with novel micro-fiber structure for NH3selective catalytic reduction(NH3-SCR)were prepared. Due to the micro-fiber mono-lithic catalyst has a unique three-dimensional network structure and large porosity;it can improve the mass transfer ability and dispersion of active components. The results of activity evaluation indicated that compared with pure molecular sieve catalysts,the two kinds of micro-fiber monolithic catalysts ex-hibit superior catalytic activity and sulfur resistance. The results of dynamic calculation indicated that the kinetic constant of microfiber monolithic catalysts is larger than that of pure molecular sieve cata-lysts and is the kinetic reason for the higher activity of micro-fiber monolithic catalysts. This study pres-ents huge potential in the field of NH3-SCR.
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