Investigation of the stability of Zn-based HZSM-5 catalysts for methane dehydroaromatization

- Stability of different Zn species under methane dehydroaromatization reaction were studied.
- Anchored [Zn(OH)]+ is more reactive and stable than ZnO during MDA reaction.
- The highest benzene yield was observed under 3 wt% Zn loading on HZSM-5.
- Addition of CO2 reduces coke formation and stabilize aromatic yield.
- Reduction and vaporization of ZnO was reduced by CO2 addition.