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

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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Abstract

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.