Development of Ag-modified Zeolite as HC-Trap in automotive cold-start emissioncontrol

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.

Keywords:

Toluene-TPD , Ag-ZSM-۵ , cold-start