Conversion of Oxygenates on H-ZSM-5 Zeolites—Effects of Feed Structure and Si/Al Ratio on the Product Quality

The conversion of different biogenic feedstocks to hydrocarbons is a major challenge when ensuring hydrocarbon and fuel supply in spite the heterogeneity this feed. Flexible adaptation changing compositions mandatory for respective processes. In study, oxygenate model feeds, such as alcohols, aldehydes, carboxylic acids esters, were converted at 500 °C 5 barg H2 using H-ZSM-5 zeolite catalysts with various Si/Al ratios identify relationship between feed structure final product distribution. As main outcome, distribution becomes increasingly independent Al-rich catalyst samples low Time on Stream (ToS). Some minor exceptions are increased formation aromatics during ToS carbonyl oxygenates compared primary alcohols dominance initial deoxygenation products Si-rich samples. This interpreted by multi-stage reaction sequence, which involves subsequent integration olefin intermediates into network. results pave way towards achievement desired simply adaption Al content H-ZSM-5.