The impact of upgrading temperature and biomass-to-catalyst mass ratio on upgrading pine pyrolysis vapors over HZSM-5 was studied in a dual fluidized bed reactor system. Increasing the upgrading temperature or reducing the biomass-to-catalyst ratio enhanced deoxygenation but decreased organic oil yields. Higher upgrading temperatures enhanced transformation of carbon into gaseous products, whereas the reduced biomass-to-catalyst ratio increased the conversion of biomass vapors to coke. While oxygen was removed as CO, H₂O, and CO₂, decarboxylation was limited by the amount of acids in the pyrolysis vapors. Bio-oil with molecular weight in gasoline range was derived via catalytic upgrading. The molecular homogeneity was improved at higher catalytic upgrading temperature and lower biomass-to-catalyst (B:C) ratio. Increasing the B:C ratio decreased the fraction of aliphatic C–H bonds and polyaromatics and increased the retention of both aliphatic and aromatic OH groups. Increasing the upgrading temperature enhanced cracking by ZSM-5, leading to oil with lower molecular weight, enhanced dealkylation and formation of light hydrocarbon gases, enhanced demethoxylation, and decreased polyaromatics formation. Aliphatic and aromatic OH decreased as upgrading temperature was increased from 500 to 550 °C, but there was less impact when the temperature was further increased to 600 °C.

中文翻译：

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详细的油成分分析能够评估温度和生物质/催化剂比对松散蒸气在ZSM-5上异位催化快速热解的影响

在双流化床反应器系统中研究了温度和生物质/催化剂质量比的提高对HZSM-5上的松木热解蒸气的提高的影响。提高提质温度或降低生物质与催化剂的比例可增强脱氧作用，但可降低有机油收率。较高的提纯温度促进了碳向气态产物的转化，而降低的生物质与催化剂的比例则增加了生物质蒸气向焦炭的转化。除去氧气作为CO，H ₂ O和CO ₂脱羧受到热解蒸气中酸的量的限制。分子量在汽油范围内的生物油是通过催化提质获得的。在较高的催化剂提质温度和较低的生物质与催化剂（B：C）比下，分子均质性得到改善。B：C比的增加降低了脂肪族C–H键和聚芳族化合物的比例，并增加了脂肪族和芳香族OH基团的保留率。升高升级温度会提高ZSM-5的裂化，导致油的分子量降低，脱烷基化和轻烃气体形成，脱甲氧基化增强和聚芳烃形成减少。脂肪族和芳香族OH随升级温度从500升高到550°C而降低，但当温度进一步升高到600°C时影响较小。