Abstract: Aluminum fiber supported Cu-ZSM-5 and Cu-SSZ-13 catalysts with novel micro-fiber structure for NH3 selective catalytic reduction (NH3-SCR) were prepared. Due to the micro-fiber monolithic 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 exhibit 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 catalysts and is the kinetic reason for the higher activity of micro-fiber monolithic catalysts. This study presents huge potential in the field of NH3-SCR.

Key words: micro-fiber, molecular sieve, three-dimensional network structure, NH3-SCR, kinetics