生物油中酸类和酮类化合物具有较高的裂化活性，而使用分子蒸馏技术能将这些组分富集到蒸出馏分中，因此蒸出馏分相比原始生物油具有更好的裂化特性.为了模拟实际蒸出馏分的组成，本文将生物油模化物(羟基丙酮(HPO)、环戊酮和乙酸)进行配比混合，在固定床反应器上对其与乙醇的共裂化行为进行了研究，考察了不同反应温度和压力对混合反应物的转化率、粗汽油相的选择性和组成的影响.研究发现，当反应温度在340°C时，乙酸和乙醇的转化率分别仅为67.9%和74.4%，同时得到的油相产物中烃类含量仅为59.8%，并含有大量的含氧副产物.常压裂化同样生成了低品质的油相产物，同时油相选择性仅为10.8%.提高反应温度能促进反应物的转化，提高裂化过程中的脱氧效率，而提高反应压力对液体烃类的生成有明显的促进作用.在400°C和2 MPa时，酸类和酮类都有良好的裂化表现，反应物接近完全转化，粗汽油相选择性达到31.5%，且全部由烃类组成，其中芳香烃含量高达91.5%.此外，反应后催化剂表征和稳定性测试结果表明，催化剂在较长时间反应后会失活，但通过催化剂再生能够很好地恢复催化剂活性.
Acids and ketones in biomass pyrolysis oil (bio-oil) can be readily cracked to produce hydrocar-bons. They can also be enriched in the distilled fraction using molecular distillation techniques. To simulate the actual composition of the distilled fraction, the co-cracking performance of mixtures of hydroxypropanone, cyclopentanone, and acetic acid with ethanol in a fixed-bed reactor over an HZSM-5 catalyst was studied. The influences of reaction temperature and pressure on the reactant conversion, selectivity, and composition of the oil phase were investigated. At a low reaction tem-perature of 340 °C, the conversions of acetic acid and ethanol were as low as 67.9%and 74.4%, respectively, and the oil phase had a low hydrocarbon content of 59.8%, with large amounts of oxygenated byproducts. Cracking under atmospheric pressure also generated a low-quality oil phase with a very low selectivity of only 10.8%. Increasing the reaction temperature promoted reactant conversion and improved the deoxygenation efficiency, whereas increasing the reaction pressure significantly promoted hydrocarbon production. The optimum conditions for biogasoline production were 400 °C and 2 MPa. Under these conditions, the reactant conversion reached 100%and the oil phase selectivity was 31.5 wt%. This oil phase consisted entirely of hydrocarbons, 91.5 wt%of which were aromatic hydrocarbons, indicating that the HZSM-5 catalyst had high activity for deoxygenation and aromatization reactions during cracking. In addition, characterization of the spent catalysts and stability tests showed that the catalyst was deactivated after a long reaction time. However, the catalytic activity was recovered by catalyst regeneration.
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