The massive consumption of petroleum and the increasingly deteriorating environment has triggered the attention and development of sustainable chemistry recently. Biomass source is the only renewable carbon source on Earth, which is regarded as the potential alternative to the current fossil fuels that cannot be regenerated in a short time. Past decades have witnessed great advances in the utilization of biomass with developed technologies. However, the quality of bio-oils obtained from pyrolysis at the various temperature is poor, which cannot be directly used as valuable chemicals and fuels. Molecular sieve catalyst (zeolite) have successfully applied in the catalytic conversion of different products after biomass pyrolysis, because of their uniform pore structure, strong acidity, and stable framework. This review emphasizes the traditional and the modification of the zeolite acidic active sites and pore structure and their roles in biomass catalytic pyrolysis. First, we compared the catalytic effects of biomass and its derivatives on traditional zeolites. The results show that ZSM-5 has the best catalytic effect (more high-value products), because of its shape selectivity. Different from the previous articles about the effect of modification on one side, this Review mainly introduces the combination of different methods to modify and optimize acidic sites and pores to improve the catalytic effect of rapid biomass pyrolysis. The zeolite was modified to improve the selectivity and yield of the target product, and a certain optimization effect was achieved. From different methods of mesopore formation to metal doping, the ways of adjusting zeolite catalysts and discussions of changes in acidity after metals being doped into zeolites are reviewed. Simultaneously, a hydrogen source was introduced to deal with the problem of insufficient hydrogen content, to improve the quality of bio-oils. Finally, the advantages and disadvantages of catalytic conversion over the modified zeolite (ZSM-5) are analyzed, and the prospects in this field are also discussed.

中文翻译：

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以孔隙度和酸度为重点的沸石催化剂上的生物质催化热解：最新研究进展

石油的大量消费和日益恶化的环境最近引起了可持续化学的关注和发展。生物质能是地球上唯一的可再生碳源，被认为是目前无法在短时间内再生的化石燃料的潜在替代品。在过去的几十年中，见证了利用先进技术对生物质进行利用的巨大进步。然而，在各种温度下通过热解获得的生物油的质量很差，不能直接用作有价值的化学品和燃料。分子筛催化剂（沸石）具有均匀的孔结构，强酸度和稳定的骨架，已成功应用于生物质热解后不同产物的催化转化。这篇综述强调了沸石酸性活性位点和孔结构的传统和修饰及其在生物质催化热解中的作用。首先，我们比较了生物质及其衍生物对传统沸石的催化作用。结果表明，ZSM-5具有最佳的催化效果（更多高价值的产品），这是由于其形状选择性。与以前关于修饰作用的文章不同，本综述主要介绍了不同方法的组合以修饰和优化酸性位点和孔，以改善快速生物质热解的催化作用。对沸石进行了改性，以提高目标产物的选择性和收率，达到了一定的优化效果。从中孔形成的不同方法到金属掺杂，综述了调节沸石催化剂的方法以及将金属掺杂到沸石中后酸度变化的讨论。同时，引入氢源以解决氢含量不足的问题，以提高生物油的质量。最后，分析了改性沸石（ZSM-5）催化转化的优缺点，并展望了该领域的前景。