Influence of various templates on the performance of MFI zeolite in catalytic synthesis of trioxane

IF 2.5 4区 材料科学 Q2 CHEMISTRY, APPLIED Journal of Porous Materials Pub Date : 2024-08-27 DOI:10.1007/s10934-024-01677-7
Wenhui Wu, Kangrui Zhao, Kun Xiao
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Abstract

ZSM-5 is widely used in the field of catalysis due to its stability and tunability. Its acidity can be adjusted not only by varying the initial gel composition, but also by incorporating different types of template to enhance its performance. Both [Ga]-MFI and [Ga, Al]-MFI have demonstrated promising performance in the catalytic trioxane of formaldehyde synthesis. However, there is currently a paucity of research examining the influence of different templates on the catalytic performance of [Ga]-MFI and [Ga, Al]-MFI. The influence of different templates on the structure, morphology, and pore structure of the zeolite has been revealed through the application of characterisation techniques, including XRD, MAS NMR spectroscopy, ICP-OES, BET, and SEM. The impact of different templates on the acid properties of [Ga]-MFI and [Ga, Al]-MFI was assessed using NH3-TPD and Py-IR. The results of the experimental investigation into the catalytic performance of zeolites synthesised with larger molecular-structured templates indicate that these zeolites exhibit superior catalytic performance. Furthermore, the introduction of Na + ions has been observed to reduce the space-time yield of the products.

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各种模板对 MFI 沸石催化合成三氧化二砷性能的影响
ZSM-5 因其稳定性和可调性而被广泛应用于催化领域。它的酸度不仅可以通过改变初始凝胶成分来调节,还可以通过加入不同类型的模板来提高其性能。Ga]-MFI和[Ga, Al]-MFI在催化三氧甲醛合成中都表现出了良好的性能。然而,目前有关不同模板对[Ga]-MFI 和[Ga, Al]-MFI催化性能影响的研究还很少。通过应用 XRD、MAS NMR 光谱、ICP-OES、BET 和 SEM 等表征技术,揭示了不同模板对沸石结构、形态和孔隙结构的影响。使用 NH3-TPD 和 Py-IR 评估了不同模板对 [Ga]-MFI 和 [Ga, Al]-MFI 酸特性的影响。对使用较大分子结构模板合成的沸石的催化性能进行的实验研究结果表明,这些沸石具有优异的催化性能。此外,还观察到 Na + 离子的引入降低了产物的时空产率。
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来源期刊
Journal of Porous Materials
Journal of Porous Materials 工程技术-材料科学:综合
CiteScore
4.80
自引率
7.70%
发文量
203
审稿时长
2.6 months
期刊介绍: The Journal of Porous Materials is an interdisciplinary and international periodical devoted to all types of porous materials. Its aim is the rapid publication of high quality, peer-reviewed papers focused on the synthesis, processing, characterization and property evaluation of all porous materials. The objective is to establish a unique journal that will serve as a principal means of communication for the growing interdisciplinary field of porous materials. Porous materials include microporous materials with 50 nm pores. Examples of microporous materials are natural and synthetic molecular sieves, cationic and anionic clays, pillared clays, tobermorites, pillared Zr and Ti phosphates, spherosilicates, carbons, porous polymers, xerogels, etc. Mesoporous materials include synthetic molecular sieves, xerogels, aerogels, glasses, glass ceramics, porous polymers, etc.; while macroporous materials include ceramics, glass ceramics, porous polymers, aerogels, cement, etc. The porous materials can be crystalline, semicrystalline or noncrystalline, or combinations thereof. They can also be either organic, inorganic, or their composites. The overall objective of the journal is the establishment of one main forum covering the basic and applied aspects of all porous materials.
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Correction: One-step synthesis of CuO/MCM-41 nanocomposites and their application in photocatalytic degradation of dyes Modification of SBA-15 for stabilizing supported oxides Lotus leaf-derived capacitive carbon for zinc-ion hybrid supercapacitors prepared by one-step molten salt carbonization Influence of various templates on the performance of MFI zeolite in catalytic synthesis of trioxane Facile synthesis of copper sulfide loaded mesoporous organosilica nanospheres with a triple-shelled hollow structure
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