An adsorber containing refractory zeolites, for example, dealuminated mordenite, dealuminated zeolite Y, and/or zeolite ZSM-5 with SiO 2 Al 2 O 3 molar ratios of >8 is used to remove Pb, P, S, Zn, and other contaminants from the exhaust gases. The adsorbents may be doped with Cu, Fe, Na, and/or K or may be in the acid H-form.