超交联聚苯乙烯水热沉积法合成Fe/Ru作为有前途的费托催化剂

IF 4.5 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Mariia E. Markova, Antonina A. Stepacheva, Alexey V. Bykov, Yurii V. Larichev, Valentin Y. Doluda, Mikhail G. Sulman, Lioubov Kiwi-Minsker
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引用次数: 0

摘要

本文提出了水热沉积法合成超交联聚苯乙烯(HPS)负载Fe/ ru催化剂,用于费托合成(FTS),以获得高收率的汽油级烃类。表征结果表明,所制得的2%Fe-HPS单金属催化剂含有多模态分布的Fe3O4颗粒(平均粒径为11、30和45 nm)。Ru的加入导致了颗粒尺寸的减小,且粒径分布更窄(约为5 nm)。Ru作为Fe3O4晶体的成核剂,因为它对HPS表面具有较高的亲和力,并且牢固地锚定在聚合物的苯环上。这防止了活性相从载体中浸出,提高了催化剂的稳定性。钌的加入还为CO和H2的化学吸附提供了补充位点,使FTS反应活性比单金属2%Fe-HPS复合材料提高了1.5倍。与单金属复合材料相比,2%Fe-1%Ru-HPS复合材料在CO转化率约30%时对C5-C11烷烃的选择性提高了约20%。此外,在2%Fe-1%Ru-HPS催化剂的存在下,ft产物的支链烃选择性约为17.5 mol%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fe/Ru synthesized by hydrothermal deposition on hyper-crosslinked polystyrene as promising Fischer-Tropsch catalyst

In this work, Fe/Ru-catalyst supported on hyper-crosslinked polystyrene (HPS) synthesized via hydrothermal deposition was proposed for the Fischer-Tropsch synthesis (FTS) to obtain a high yield of gasoline-ranged hydrocarbons. According to the characterization results, the obtained monometallic 2%Fe-HPS catalyst contains Fe3O4 particles with a multimodal distribution (mean particle size of 11, 30, and 45 nm). The addition of Ru leads to a decrease in the particle size with a narrower distribution (ca. 5 nm). Ru was shown to serve as a nucleating agent for Fe3O4 crystalline since it has a higher affinity to the HPS surface and strongly anchors to the benzene rings of the polymer. This prevents a leaching of the active phase from the support increasing the catalyst stability. Ru addition also brings supplemental sites for CO and H2 chemisorption resulting in 1.5-fold increased activity in FTS reaction compared to monometallic 2%Fe-HPS composite. 2%Fe-1%Ru-HPS composite showed ∼20% higher selectivity toward the formation of C5–C11 alkanes at about 30% conversion of CO in comparison with monometallic one. Moreover, the branched hydrocarbons with a selectivity of approximately 17.5 mol% were observed in the FTS products in the presence of a 2%Fe-1%Ru-HPS catalyst.

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来源期刊
CiteScore
7.60
自引率
6.70%
发文量
868
审稿时长
1 months
期刊介绍: Frontiers of Chemical Science and Engineering presents the latest developments in chemical science and engineering, emphasizing emerging and multidisciplinary fields and international trends in research and development. The journal promotes communication and exchange between scientists all over the world. The contents include original reviews, research papers and short communications. Coverage includes catalysis and reaction engineering, clean energy, functional material, nanotechnology and nanoscience, biomaterials and biotechnology, particle technology and multiphase processing, separation science and technology, sustainable technologies and green processing.
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