外磁场对FexOy/ZSM-5中CO2选择性加氢生成C2-C4和芳烃的促进作用

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2024-11-27 DOI:10.1016/j.apcata.2024.120036

Ratchanon Chotchaipitakkul , Sirapat Munpollasri , Waleeporn Donphai , Wanwisa Limphirat , Yingyot Poo-arporn , Supinya Nijpanich , Pongsakorn Jantaratana , Thongthai Witoon , Paisan Kongkachuichay , Metta Chareonpanich

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引用次数: 0

摘要

本研究采用密闭空间ZSM-5沸石结合外部磁场来操纵氧化铁相变，从而增强CO2加氢和选择性生产更大的碳氢化合物。氧化铁的相变受不同还原次数（0.0 ~ 6.0 h）和磁通强度（0.0 ~ 27.7 mT）的控制。FexOy/ZSM-5沸石催化剂，在20.7 mT时，表现出主要的Fe3O4相，与没有磁场的催化剂相比，实现了最高的CO2转化率（28.1 %，或3.3倍），产生了14.4倍的C2-C4烃。密闭空间ZSM-5沸石与磁场的共同作用同时实现了对反应物气体扩散的控制，促进了Fe3O4和FeO相的形成。在ZSM-5分子筛内，通过费托合成和芳构化等链式生长反应生成了由逆水气转换反应生成的烯烃。这种方法为环境友好型二氧化碳转换提供了有希望的机会。

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Promotional effect of external magnetic field in FexOy/ZSM-5 for selective CO2 hydrogenation to C2–C4 and aromatic hydrocarbons

This study employed confined-space ZSM-5 zeolite in conjunction with an external magnetic field to manipulate iron oxide phase transformations, thereby enhancing CO₂ hydrogenation and the selective production of larger hydrocarbons. Phase transformations of iron oxide were controlled by varying reduction times (0.0–6.0 h) and magnetic flux intensities (0.0–27.7 mT). The Fe_xO_y/ZSM-5 zeolite catalyst, at 20.7 mT, exhibited a predominant Fe₃O₄ phase, achieving the highest CO₂ conversion (28.1 %, or 3.3 times higher) and producing 14.4 times more C₂–C₄ hydrocarbons compared to catalysts without a magnetic field. The combined effects of confined-space ZSM-5 zeolite and the magnetic field simultaneously achieved control over reactant gas diffusion and facilitated formation of Fe₃O₄ and FeO phases. Olefins, formed via the reverse water-gas shift reaction, underwent chain growth reactions through Fischer-Tropsch synthesis and aromatization within the ZSM-5 zeolite. This approach presents promising opportunities for environmentally friendly CO₂ conversion.

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.