Selective Catalytic Reduction of NO_x with NH₃ on Cu-, Fe-, and Mn-Zeolites Prepared by Impregnation: Comparison of Activity and Hydrothermal Stability

Table 1

Physical characterization of support materials.

Support	Si/Al	Pore size (Å)^a	Surface area (m^2·g^−1)	Total acidity (µmol NH3·g^−1)
SSZ-13	13.1	3.8 × 3.8	655	1277
BEA	12.5	6.6 × 7.7	640	1008
ZSM-5	15	5.3 × 5.6	430	1062

^ahttp://www.iza-structure.org/default.htm.