Morteza Taghavi - Iran Delco company, Tehran, Iran.
Peyman Taghavi - Iran Delco company, Tehran, Iran.
Moslem Azizi - Iran Delco company, Tehran, Iran.
Bahareh Fahimirad - Iran Delco company, Tehran, Iran.
Ladan Kamalzadeh - Iran Delco company, Tehran, Iran.
Nasrin Ebrahimabadi - Iran Delco company, Tehran, Iran.

In this work, modified zeolite was successfully synthesized with different percentages of Ag (۰.۷%,۲%, ۴%) by a cation exchange method. Then to identify the structures formed, characterization of Ag-ZSM-۵was done by XRD, FE-SEM, and BET. After confirming the synthesized structures, the impact of ions of Agon the zeolite framework (ZSM-۵) investigated. The results shown that the modification of zeolites with Ag ۲%has a better performance compared to other percentages of Ag. Also, the experimental results indicated thatAg-ZSM-۵ can adsorb Toluene in cold–start step in both dry and wet conditions.

Toluene-TPD, Ag-ZSM-۵, cold-start