The catalytic fast pyrolysis (CFP) of algal biomass was conducted in a newly developed double microfixed-bed reactor. Real-time measurements of catalytic vapors as a function of the cumulative biomass-to-catalyst ratio (BCR) could be achieved by means of a single photoionization mass spectrometer. The coked zeolites were characterized by various methods. During the catalytic conversion of algal biomass, products would tend to be classified into three different types based on their conversion (or formation) efficiency in CFP at the given BCR. More importantly, it was inferred that the “step-1”, which had been defined in the CFP of lignocellulosic biomass and would cause the catalyst coking, was lacking in the upgrading processes of algae-based pyrolysis vapors, probably due to the catalytic effect of minerals in algal biomass. This indicates the fact that algal biomass (especially for Sargasso) could be potentially an ideal feedstock to obtain valuable products via CFP. Furthermore, the mass per injection was proven to be an important factor to influence the accessibility of HZSM-5 catalyst due to the “traffic jam” when the primary volatiles enter the zeolite pores.

中文翻译：

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双微固定床反应器中藻类生物质的异位催化热解：催化剂失活及其结焦行为

藻类生物质的快速催化热解（CFP）在新开发的双微固定床反应器中进行。借助单个光电离质谱仪可以实时测量作为累积生物质与催化剂之比（BCR）函数的催化蒸气。焦化的沸石用各种方法表征。在藻类生物质的催化转化过程中，根据给定BCR下CFP中产品的转化（或形成）效率，产品倾向于分为三种不同的类型。更重要的是，推断木质纤维素生物质的CFP中定义的会导致催化剂结焦的“步骤1”缺少藻类热解蒸气的升级过程，可能是由于催化作用藻类生物质中的矿物质含量。这表明藻类生物质（尤其是藻类生物）可能是通过CFP获得有价值产品的理想原料。此外，由于主要挥发物进入沸石孔时会出现“交通堵塞”，因此，每次进样质量被证明是影响HZSM-5催化剂可及性的重要因素。