The Effect of Iron Additive Incorporation Mode on the Fischer–Tropsch Synthesis Performance of Alumina-Supported Cobalt Catalysts

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-09-03 DOI:10.1007/s10562-025-05159-6

Yixuan Li, Yuanli Xiang, Xinyan Ai, Yuhua Zhang, Yanxi Zhao, Chengchao Liu, Jinlin Li

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引用次数: 0

Abstract

Co-Fe bimetallic catalysts have attracted increasing attention in the field of Fischer–Tropsch synthesis (FTS). In this study, cobalt was supplied in the form of Co₃O₄ nanoparticles, and three different methods of iron (Fe) incorporation were employed: (1) Fe modification of the Al₂O₃ support prior to Co₃O₄ loading (Co/Fe-Al₂O₃), (2) co-loading of Fe and Co₃O₄ (CoFe/Al₂O₃), and (3) Fe modification of Co₃O₄ prior to loading (Co-Fe/Al₂O₃). These model catalysts were used to investigate the interactions between Co, Fe and the support and their impact on the catalytic activity and product selectivity of FTS. The results showed that the addition of Fe promotes cobalt reduction, modifies H₂ and CO adsorption properties and regulates catalytic performance. Compared with Co/Al₂O₃, Co/Fe-Al₂O₃ exhibited the best reducibility and significantly reduced CH₄ selectivity from 19.2 to 11.2%. However, its CO adsorption weakened, decreasing CO conversion from 25.3 to 21.4%. Co-Fe/Al₂O₃ showed enhanced H₂ and CO adsorption, increasing CO conversion by 18.9%. These findings demonstrate that the location of Fe affects the metal-support interaction, reducibility and adsorption activation abilities of the Co catalyst, ultimately altering FTS activity and selectivity.

Graphical Abstract

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铁添加剂掺入方式对铝负载钴催化剂费托合成性能的影响

Co-Fe双金属催化剂在费托合成领域受到越来越多的关注。在本研究中，钴以Co3O4纳米颗粒的形式提供，并采用三种不同的铁（Fe）掺入方法：(1)在Co3O4加载前对Al2O3载体进行铁改性（Co/Fe-Al2O3），(2)铁和Co3O4共加载（CoFe/Al2O3），(3)在Co3O4加载前进行铁改性（Co-Fe/Al2O3）。利用这些模型催化剂研究了Co、Fe与载体的相互作用及其对催化活性和产物选择性的影响。结果表明，Fe的加入促进了钴的还原，改变了H2和CO的吸附性能，调节了催化性能。与Co/Al2O3相比，Co/Fe-Al2O3表现出最好的还原性，CH4选择性从19.2%显著降低到11.2%。但CO吸附减弱，CO转化率从25.3%降至21.4%。CO - fe /Al2O3对H2和CO的吸附增强，CO转化率提高了18.9%。这些发现表明，Fe的位置影响了Co催化剂的金属-载体相互作用、还原性和吸附活化能力，最终改变了FTS的活性和选择性。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.