Fig. 1. Direct acylation of MF with acetic acid over HZSM-5.

(A) Schematic of 2-MF acylation with acetic acid over HZSM-5. (B) TPD experiment over HZSM-5 showing 2-acetyl-5-MF desorbing with 2-MF pulses from catalyst bed saturated with surface acyl species at 220°C.