To develop a structure-tailoring catalyst for catalytic conversion of lignin for value-added chemicals, a series of novel Fe-Ce-Al metal oxide catalysts was synthesized via different methods to tailor activity and structure for catalytic pyrolysis of lignin to enhance hydrocarbon-rich bio-oil. The results revealed that FeCeAl-CO catalysts derived from coprecipitation method with smaller particle sizes exhibited excellent catalytic deoxygenation activity due to higher Lewis/Brønsted acid, reversible Ce³⁺/Ce⁴⁺ redox pairs, tailorable oxygen vacancies and promoted β-O-4, aromatic-OCH₃ and side-chain cleavage. Additionally, coprecipitation method was facilitated to enhance hydrogen transfer, side-chain cleavage and aromatization reactions, while wet impregnation was beneficial to enhance demethoxylation and H-abstraction activity. During catalytic pyrolysis process, over 57.91% of hydrocarbon, including 20.21% and 25.71% for aromatics and olefins were achieved over FeCeAl-CO catalyst. Over 60.74% phenols and 52.48% alkylphenols were obtained over Fe-Ce/Al₂O₃-IM catalyst due to synergistic effect of FeOx and CeOx species. Fe-Ce-Al catalyst exhibited great activity and stability after fourth run, greater Brønsted acid-favored lignin cleavage and coke deposition, and metal active species leaching, oxidation and pore blockage were the key reasons for deactivation. Therefore, these findings could provide a cost-effective method for designing structure-tailoring catalysts for direct catalytic deoxygenation of lignin to generate hydrocarbon-rich upgrading bio-oil.

为了开发用于木质素催化转化为增值化学品的结构定制催化剂，通过不同的方法合成了一系列新型Fe-Ce-Al金属氧化物催化剂，以定制木质素催化热解的活性和结构，以增强富烃能力生物油。结果表明，共沉淀法制备的具有较小粒径的FeCeAl-CO催化剂由于较高的Lewis/Brønsted酸、可逆的Ce ³⁺ /Ce ⁴⁺氧化还原对、可调节的氧空位和促进的β-O-4而表现出优异的催化脱氧活性。 、芳香族-OCH ₃和侧链裂解。此外，共沉淀法有利于增强氢转移、侧链断裂和芳构化反应，而湿浸渍有利于增强脱甲氧基化和H-抽象活性。在催化热解过程中，在FeCeAl-CO催化剂上，烃类的产率超过57.91%，其中芳烃和烯烃的产率分别为20.21%和25.71%。由于FeOx和CeOx物质的协同作用，在Fe-Ce/Al ₂ O ₃ -IM催化剂上得到了超过60.74%的苯酚和52.48%的烷基酚。Fe-Ce-Al催化剂在第四次运行后表现出良好的活性和稳定性，较大的布朗斯台德酸有利于木质素裂解和积炭，金属活性物质的浸出、氧化和孔堵塞是失活的关键原因。因此，这些发现可以为设计结构定制催化剂提供一种经济有效的方法，用于木质素的直接催化脱氧以产生富含碳氢化合物的升级生物油。