CATALYTIC COMBUSTION OF ODORS IN DOMESTIC SPACES ON ION-EXCHANGED ZEOLITES

Performance of ZSM-5 zeolites, ion-exchanged with different kinds of m etals (Me/H-ZSM-5; Me=Cu, Zn, Mn, Fe, Co, and Ni) and H-ZSM-5 itself, was investigated for the catalytic combustion of trimethylamine (TMA), which is one of the typical odors in domestic spaces. The highest act ivity was achieved on both Cu/H-ZSM-5 and Fe/H-ZSM-5. The activity of Cu/H-ZSM-5 for the combustion increased with an increase in the amount of ion-exchanged Cu. TPD and FT-IR for the catalysts were measured to investigate the role of ion-exchanged metals in the catalytic combust ion of TMA, and it was found that the metals weakened the strong acid sites of H-ZSM-5, and strongly interacted with TMA adsorbed. (C) 1998 Elsevier Science B.V.