Abstract
The pinewood was pyrolyzed in the first reactor at a heating rate of 10 °C min−1 from room temperature to 700 °C, and the vapor was allowed to be cracked through the second reactor in a temperature range of 450–750 °C without and with HZSM-5. Attempts were made to determine a wide spectrum of gaseous and liquid products, as well as the mass and element partitions to gas, water, bio-oil, coke and char. HZSM-5 showed a preferential deoxygenation effect via the facilitated decarbonylation and decarboxylation with the inhibited dehydration at 550–600 °C. This catalyst also displayed a high selectivity for the formations of aromatic hydrocarbons and olefins by the promoted hydrogen transfer to these products at 550–600 °C. The bio-oil produced with HZSM-5 at 500–600 °C had the yields of 14.5–16.8%, the high heat values of 39.1–42.4 MJ kg−1, and the energy recoveries of 33–35% (all dry biomass basis).
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