Based on the important effect of catalyst on the plasma-catalytic system, various types of zeolites (5A, HZSM-5, Hβ, HY and Ag/HY) were chosen as catalysts to remove toluene under non-thermal plasma condition in this work. The results showed that all the zeolites, whether with toluene adsorption ability or not, significantly enhanced the toluene removal efficiency in the plasma discharge zone. Moreover, the carbon balance and CO 2 selectivity showed the same tendency of Ag/HY >HY > Hβ (HZSM-5)>5A, which was basically consistent with toluene adsorption ability, while opposed with the ozone emission. Loading silver on zeolite greatly decreased organic byproducts emission, and further improved the mineralization of toluene oxidation. At the same time, the intermediates including ringopening products on the catalyst surface were identified, and the pathways of toluene decomposition were proposed.

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