Abstract Six different double-layer metal supported core-shell catalysts were prepared for catalytic fast pyrolysis of enzymatic lignin via Py-GC/MS, in order to investigate the influence of metal types and loading positions on liquid products. The optimal liquid product distribution was obtained when loading Fe species on the microporous core and Mg on the mesoporous layer of core-shell catalysts, manifested in the promotion of monocyclic aromatic hydrocarbons (MAHs) and inhibition of phenols. The incorporation of Mg into the mesoporous layer probably generated the basic sites and the loading of Fe on the microporous core increased the strong acid sites. The synergistic effect of the two metals incorporated into the respective layers of core-shell catalyst could inhibit the immoderate aromatization and polymerization of MAHs to form polycyclic aromatic hydrocarbons (PAHs), and accelerate the deoxygenation reaction.

中文翻译：

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双层金属负载核壳催化剂催化木质素热解制备芳烃

摘要 为了研究金属类型和负载位置对液体产物的影响，制备了六种不同的双层金属负载核壳催化剂，用于通过 Py-GC/MS 催化酶促木质素的快速热解。当在微孔核上负载 Fe 物种和在核壳催化剂的介孔层上负载 Mg 时，获得了最佳的液体产物分布，表现为单环芳烃 (MAHs) 的促进和酚类的抑制。Mg 掺入介孔层可能会产生碱性位点，而微孔核上 Fe 的负载增加了强酸位点。