Chul Wee Lee , Paul Joe Chong , Young Chul Lee , Chong Shik Chin , Larry Kevan
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Determination of ion-exchanged Co2+ cation in Co-ZSM-5 by temperature-programmed desorption
It is shown that temperature-programmed desorption of adsorbed NO on Co-ZSM-5 zeolite used in selective catalytic reduction can accurately measure the amount of Co2+ cation for Co/Al ratios from 0 to 0.42 where the 0.42 limit corresponds to 84% maximum exchange. Evidence is also shown for the formation of cobalt oxide particles in Co-ZSM-5 for Co/Al ratios above 0.42.
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