Sustainable Synthesis of Core-shell Structured ZSM-5@Silicalite-1 Zeolite

Luan, Huimin; Wu, Qinming; Zhang, Jian; Wang, Qianqian; Meng, Xiangju; Xiao, Feng‐Shou

doi:10.1007/s40242-021-1288-y

Cited by 14 publications

(3 citation statements)

References 32 publications

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“…It is well known that seeds can significantly increase the crystallization rate, prevent the formation of impurities, narrow the particle size distribution, or decrease the utilization of OSDAs. 23–26 In this study, highly crystalline and pure ZK-5 can be formed in the presence of the as-synthesized SAPO-34 seed. To reveal the role of the as-synthesized SAPO-34 seed, we investigated the crystallization behaviour of the initial mixtures without any seed, with a seed of low-silica CHA with a Si/Al ratio of 3.0 (denoted as CHA(3.0), the synthetic details are provided in the ESI†), and with the equivalent chemicals of the as-synthesized SAPO-34.…”

Section: Resultsmentioning

confidence: 85%

Exclusive SAPO-seeded synthesis of ZK-5 zeolite for selective synthesis of methylamines

Han

Wang

et al. 2022

Inorg. Chem. Front.

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Section: Resultsmentioning

confidence: 85%

Exclusive SAPO-seeded synthesis of ZK-5 zeolite for selective synthesis of methylamines

Han

Wang

et al. 2022

Inorg. Chem. Front.

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“…In order to reduce costs, without using TPAOH, Luan et al mixed and ground the prepared zeolite seeds with Na 2 SiO 3 •9 H 2 O and solid silica gel, then added ethanol, and finally reacted and crystallized in a high-pressure reaction kettle, successfully prepared ZSM-5@Silicalite-1 catalyst with core-shell structure, and realized the low-cost synthesis of zeolite capsule catalyst without TPAOH. [96] Compared with traditional hydrothermal synthesis, the solventless method has obvious advantages: i) The synthesis process is simple and saves a lot of time. The involved preparation methods mainly include basic techniques such as mixing, grind-ing, and heating.…”

Section: Solvent-free Methodsmentioning

confidence: 99%

“…mixed and ground the prepared zeolite seeds with Na 2 SiO 3 ·9 H 2 O and solid silica gel, then added ethanol, and finally reacted and crystallized in a high‐pressure reaction kettle, successfully prepared ZSM‐5@Silicalite‐1 catalyst with core–shell structure, and realized the low‐cost synthesis of zeolite capsule catalyst without TPAOH. [ 96 ]…”

Section: Preparation Of Capsule Catalystmentioning

confidence: 99%

Synthesis, Types, and Applications of Zeolite Capsule Catalysts

Zhang

Sun

Zhang

et al. 2023

Cryst. Res. Technol.

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Capsule catalysts offer a unique spatial confinement effect, which effectively minimizes byproduct formation, enhances catalyst life, and promotes tandem reactions, thus reducing energy, time, and raw material consumption. This review presents an overview of recent advances and research progress in capsule catalysts, highlighting major breakthroughs in preparation strategies over the past decade. Innovative synthesis methods are discussed based on synthesis principles, difficulty, and effectiveness, along with an analysis of growth mechanisms and the advantages and disadvantages of zeolite shells. Application status of capsule catalysts in high‐value hydrocarbon synthesis from syngas, low‐carbon alkane dehydroaromatization, and CO2 hydrogenation reactions is explored. Finally, challenges and future prospects for scientific research and industrial applications of capsule catalysts are addressed.

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Coaxial 3D Printing of Zeolite‐Based Core–Shell Monolithic Cu‐SSZ‐13@SiO₂ Catalysts for Diesel Exhaust Treatment

et al. 2023

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Core–shell catalysts with functional shells can increase the activity and stability of the catalysts in selective catalytic reduction of NOx with ammoniax. However, the conventional approaches based on multistep fabrication for core–shell structures encounter persistent restrictions regarding strict synthesis conditions and limited design flexibility. Herein, a facile coaxial 3D printing strategy is for the first time developed to construct zeolite‐based core–shell monolithic catalysts with interconnected honeycomb structures, in which the hydrophilic noncompact silica serves as shell and Cu‐SSZ‐13 zeolite acts as core. Compared to a Cu‐SSZ‐13 monolith which suffers from the interfacial diffusion, the SiO2 shell layer can increase the accessibility of active sites over Cu‐SSZ‐13@SiO2, resulting in a 10–20% higher NO conversion at200−550 °C under 300 000 cm3 g−1 h−1. Meanwhile, a thicker SiO2 shell enhances the hydrothermal stability of the aged catalyst by inhibiting the dealumination and the formation of CuOx. Other representative monolithic catalysts with different topological zeolites as shell and diverse metal oxides as the core can be also realized by this coaxial 3D printing. This strategy allows multiple porous materials to be directly integrated, which allows for flexible design and fabrication of various core–shell monolithic catalysts with customized functionalities.

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Sustainable Synthesis of Core-shell Structured ZSM-5@Silicalite-1 Zeolite

Cited by 14 publications

References 32 publications

Exclusive SAPO-seeded synthesis of ZK-5 zeolite for selective synthesis of methylamines

Exclusive SAPO-seeded synthesis of ZK-5 zeolite for selective synthesis of methylamines

Synthesis, Types, and Applications of Zeolite Capsule Catalysts

Coaxial 3D Printing of Zeolite‐Based Core–Shell Monolithic Cu‐SSZ‐13@SiO₂ Catalysts for Diesel Exhaust Treatment

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Sustainable Synthesis of Core-shell Structured ZSM-5@Silicalite-1 Zeolite

Cited by 14 publications

References 32 publications

Exclusive SAPO-seeded synthesis of ZK-5 zeolite for selective synthesis of methylamines

Exclusive SAPO-seeded synthesis of ZK-5 zeolite for selective synthesis of methylamines

Synthesis, Types, and Applications of Zeolite Capsule Catalysts

Coaxial 3D Printing of Zeolite‐Based Core–Shell Monolithic Cu‐SSZ‐13@SiO2 Catalysts for Diesel Exhaust Treatment

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Product

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Coaxial 3D Printing of Zeolite‐Based Core–Shell Monolithic Cu‐SSZ‐13@SiO₂ Catalysts for Diesel Exhaust Treatment