Controlling the Activity and Selectivity of HZSM-5 Catalysts in the Conversion of Biomass-Derived Oxygenates Using Hierarchical Structures: The Effect of Crystalline Size and Intracrystalline Pore Dimensions on Olefins Selectivity and Catalyst Deactivation

Abstract The conversion of biomass-derived oxygenates over zeolite catalysts constitutes a challenge for the efficient production bio-based chemicals and fuels due to difficulty in controlling selectivity high coke formation such reactions. This is partly attributed microstructure catalyst which affects products derived from oxygenates. In this study, deactivation characteristics three different model found biomass bio-oil (namely, acetol, furfural guaiacol) ZSM-5 zeolites varying acidity, pore crystal size prepared with bottom-up top-down approaches were evaluated using fixed bed microreactor at atmospheric pressure space velocity 5 h −1 temperature range 450–650 °C. Analysis experimental results indicates that optimum conversions vicinity 600 °C allowing complete compounds resistance coking. mechanisms those are discussed based on obtained results. general, mesoporosity induce easier access active sites improving mass transfer but also alter location type, strength acid higher yields primary intermediate as olefins.