Abstract A sequential two-step microwave-assisted catalytic fast pyrolysis (MACFP) of water hyacinth for hydrocarbon-rich bio-oil production is studied. This newly developed technique is characterized by microwave-assisted fast pyrolysis followed by catalytic upgrading using an additional catalyst packed bed, and it thus achieves the independent control of pyrolysis and catalytic upgrading. On the other hand, in order to minimize coke formation and promote hydrocarbon production in sequential two-step MACFP of water hyacinth, Ce-doped γ-Al2O3/ZrO2 composite mesoporous catalyst (CAZ) is synthesized and used in this study. The effects of catalyst type, pyrolysis temperature, catalytic upgrading temperature and catalyst reusability on product distribution and chemical compositions in bio-oil are investigated. The results demonstrate that water hyacinth is a good biomass candidate for fuel demand, and CAZ can facilitate the hydrocarbon fuel production in bio-oil and exhibits an excellent catalyst reusability. Meanwhile, it is found that the optimal temperatures for water hyacinth pyrolysis and pyrolytic vapor upgrading are 650 °C and 450 °C, respectively.

中文翻译：

---

Ce掺杂γ-Al 2 O 3 /ZrO 2 复合介孔催化剂连续两步微波辅助催化快速热解水葫芦生产生物油

摘要 研究了用于富烃生物油生产的水葫芦连续两步催化快速热解（MACFP）。这种新开发的技术的特点是微波辅助快速热解，然后使用额外的催化剂填充床进行催化升级，从而实现了热解和催化升级的独立控制。另一方面，为了在水葫芦的连续两步MACFP中最大限度地减少焦炭形成并促进碳氢化合物的生产，本研究合成并使用了Ce掺杂的γ-Al2O3/ZrO2复合介孔催化剂（CAZ）。研究了催化剂类型、热解温度、催化升级温度和催化剂重复使用性对生物油中产物分布和化学成分的影响。结果表明，水葫芦是满足燃料需求的良好生物质候选者，CAZ 可以促进生物油中的碳氢燃料生产，并表现出优异的催化剂可重复使用性。同时，发现水葫芦热解和热解蒸汽提质的最佳温度分别为650°C和450°C。