Hollow structured HZSM-5 was synthesized by posttreatment to introduce the meso-/microporous system. This resulted in the enhancement of the performance for catalytic fast pyrolysis of pine for aromatic products. Compared with traditional HZSM-5 catalyst, the hollow HZSM-5 catalyst exhibited enhanced the mass transfer ability, leading to higher selectivity of aromatics such as benzene, toluene, ethylbenzene, xylene, and naphthalene (58%). The intrinsic mechanism into the enhanced performance was further elucidated by multi-techniques such as HAADF-STEM, TGA-MS, TPD, Py-IR and NMR. This work provides a potential approach for directional production of woody biomass powder.
Keywords renewable biomass, catalytic pyrolysis, hollow ZSM-5, enhanced performance, aromatics