Effect of Shell Thickness on Skeletal Fe@HZSM-5 Core-Shell Catalysts for Fischer-Tropsch Synthesis

孙冬,; 孙博,; 裴燕,; 闫世润,; 范康年,; 乔明华,; 张晓昕,; 宗保宁,

doi:10.6023/a20120563

Cited by 5 publications

(1 citation statement)

References 25 publications

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“…1 引言低碳烯烃(特别是乙烯、丙烯、丁烯等)是最重要和最基本的有机化工原料, 传统的生产工艺严重依赖于石油, 根据我国"相对富煤、缺油、少气"的资源状况, 以 "煤"代"油"生产低碳烯烃, 是实现我国煤炭清洁高效利用和保证国家能源安全的重要途径之一 [1][2][3][4][5] , 开发煤基合成气制取低碳烯烃技术具有重要的战略意义和实际应用价值. 煤经合成气可通过间接法或直接法制取低碳烯烃, 间接法中合成气经甲醇制低碳烯烃(MTO)技术已实现商业化 [6][7][8] .…”

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Preparation of Fe@Si/S-34 Catalysts and Its Catalytic Performance for Syngas to Olefins

Chen¹,

Meng²,

Lu³

et al. 2023

Acta Chimica Sinica

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The direct synthesis of light olefins from syngas via Fischer-Tropsch synthesis reaction is a promising technology for direct synthesis of olefins from syngas. The key is to improve the selectivity of light olefins through the regulation of product distribution. In this work, the hydrophobic Fe@Si catalyst was prepared by room temperature solid state method-Stöber-silylation method, and then the catalyst was combined with SAPO-34 molecular sieves with different contents to prepare Fe@Si/S-34 composite catalysts. The effects of SAPO-34 molecular sieve content on the physicochemical properties of the catalysts were investigated by X-ray diffraction, scanning electron microscopy, N2 adsorption-desorption, NH3 temperature programmed desorption and water contact angle measurement. The results showed that the content of SAPO-34 molecular sieve has significant influence on the surface area, pore volume, acidity and hydrophobicity of the catalysts. With the increase of SAPO-34 molecular sieve content, the specific surface area and total pore volume of the catalyst increased, the weak acid and medium-strong acid sites increased, and the hydrophobicity weakened. The catalytic performance evaluation results showed that the Fe@Si/S-34 composite catalyst decomposed C5+ hydrocarbons into light hydrocarbons, significantly reduced the selectivity of C5+ products and increased the selectivity of C2～C4 hydrocarbons. Appropriate SAPO-34 molecular sieve could significantly improve the selectivity of C2～C4 olefins. When the mass ratio of Fe@Si catalyst to SAPO-34 is 2, the C2～C4 olefin selectivity of Fe@Si/S-34 catalyst is the highest, the conversion of CO is 80.0%, the selectivity of CO2 in the product is 8.9%, and the selectivity of C2～C4 olefins is 31.1%. In this study, the hydrophobicity of Fe@Si catalyst and the cracking activity of SAPO-34 molecular sieve for C5+ hydrocarbon were coupled together to inhibit the water-gas shift (WGS) reaction, reduce the CO2 selectivity and obtain higher C2～C4 olefin selectivity, which provided a new strategy for the development of catalysts for Fischer-Tropsch synthesis to olefins.

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Preparation of Fe@Si/S-34 Catalysts and Its Catalytic Performance for Syngas to Olefins

Chen¹,

Meng²,

Lu³

et al. 2023

Acta Chimica Sinica

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Hierarchical zeolite-encapsulated metal nanoparticles for heterogeneous catalysis

Liu,

Zhao,

Yang

et al. 2024

Nanoscale

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Lewis Acid in NaY Zeolite High Selectively Catalyze Methanol to Dimethoxymethane via Methyl Nitrite^※

Jiang¹,

Shi²,

Xu³

et al. 2022

Acta Chimica Sinica

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Effect of Shell Thickness on Skeletal Fe@HZSM-5 Core-Shell Catalysts for Fischer-Tropsch Synthesis

Cited by 5 publications

References 25 publications

Preparation of Fe@Si/S-34 Catalysts and Its Catalytic Performance for Syngas to Olefins

Preparation of Fe@Si/S-34 Catalysts and Its Catalytic Performance for Syngas to Olefins

Hierarchical zeolite-encapsulated metal nanoparticles for heterogeneous catalysis

Lewis Acid in NaY Zeolite High Selectively Catalyze Methanol to Dimethoxymethane via Methyl Nitrite^※

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Effect of Shell Thickness on Skeletal Fe@HZSM-5 Core-Shell Catalysts for Fischer-Tropsch Synthesis

Cited by 5 publications

References 25 publications

Preparation of Fe@Si/S-34 Catalysts and Its Catalytic Performance for Syngas to Olefins

Preparation of Fe@Si/S-34 Catalysts and Its Catalytic Performance for Syngas to Olefins

Hierarchical zeolite-encapsulated metal nanoparticles for heterogeneous catalysis

Lewis Acid in NaY Zeolite High Selectively Catalyze Methanol to Dimethoxymethane via Methyl Nitrite※

Contact Info

Product

Resources

About

Lewis Acid in NaY Zeolite High Selectively Catalyze Methanol to Dimethoxymethane via Methyl Nitrite^※