Investigation of Y/SBA Composite Molecular Sieves Morphology Control and Catalytic Performance for n-Pentane Aromatization

Shi, Chunwei; Wu, Wenyuan; Li, Shuai; Bian, Xue; Zhao, Suoqi; Pei, Mingyuan

doi:10.1038/srep23826

Cited by 6 publications

(2 citation statements)

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“…12–14 However, the weak acidity and the poor hydrothermal stability of the mesoporous materials are detrimental to the hydrogenation performance. 15–17 To overcome the above limitation of mesoporous materials in the HDN reactions, microporous zeolites with excellent performance of suitable acidity and good hydrothermal stability can be introduced. Therefore, some micro/mesoporous composite materials have been extensively used as catalyst supports.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of NiW catalysts supported on hierarchically meso/microporous KIT-5/Beta composites and their hydrodenitrogenation performance of quinoline

et al. 2022

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Section: Introductionmentioning

confidence: 99%

Synthesis of NiW catalysts supported on hierarchically meso/microporous KIT-5/Beta composites and their hydrodenitrogenation performance of quinoline

et al. 2022

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“…Significant attention has been paid to studying the forming mechanism of core-shell structured composite molecular sieves, due to their properties heavily depending on their structure [3][4][5][6][7][8][9]. Especially, the effect of synthesis conditions including temperature and time on multiple-layer pore structure have been extensively investigated.…”

Section: Introductionmentioning

confidence: 99%

Toward Understanding of the Effect of Nucleation Temperature on Porous Structure of Micro-Mesoporous Composite Molecular Sieves and Related Crystallization Mechanism

Shi

Liu

et al. 2019

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Although micro-mesoporous composite molecular sieves have received significant attention due to their desirable properties, they still lack systematic studies on their crystallization process to achieve controllable synthesis of composite molecular sieves. In this study, a series of Y/SBA-15 micro-mesoporous composite molecular sieves with different porous structures were synthesized by tuning nucleation temperature, based on epitaxial growth on the outer surface of the Y-type crystal particle. All composite molecular sieves were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). Moreover, the effect of nucleation temperature on the structure of composite molecular sieves was investigated, while the crystallization mechanism was also explored. Furthermore, the performance of the molecular sieves on isomerization of n-pentane was investigated, the results suggested that the isomerization selectivity was positively correlated with regularity degree of the mesoporous porous structure, where the highest isomerization reached 95.81%. This work suggests that nucleation temperature plays a key role in structures of micro-mesoporous composite molecular sieves, providing a solid basis for the further development of functional composite molecular sieves.

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Improvement of the Catalytic Performances of SBA‐15 in the Formylation of Aniline upon the Introduction of Template‐Free Nano‐Faujasite in Its Synthesis Gel

2021

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Faujasite nanoparticles with average size of 10-40 nm were obtained without any organic structure directing agents (Green synthesis), then used as precursors for the synthesis of NaY/ SBA-15 composites. Two types of composites were obtained with meso/micro porosity (C1 and C2).The inorganic salt, NH 4 F, has a crucial effect on their morphologies, therefore, their textural and catalytic properties have been mostly influenced. The resulting materials were characterized by X-ray Diffraction (XRD), N 2 sorption, Scanning Electron Microscopy (SEM) .The both composites have been successfully used as catalysts for the N-formylation reaction of aniline. As a result, N-phenylformamide was obtained with up to 90 % yield and 100 % selectivity at 50°C in 4 h (solvent-free conditions) .The catalytic tests were monitored by gas chromatography (GC) and the nature of the products was confirmed by NMR.

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Investigation of Y/SBA Composite Molecular Sieves Morphology Control and Catalytic Performance for n-Pentane Aromatization

Cited by 6 publications

References 14 publications

Synthesis of NiW catalysts supported on hierarchically meso/microporous KIT-5/Beta composites and their hydrodenitrogenation performance of quinoline

Synthesis of NiW catalysts supported on hierarchically meso/microporous KIT-5/Beta composites and their hydrodenitrogenation performance of quinoline

Toward Understanding of the Effect of Nucleation Temperature on Porous Structure of Micro-Mesoporous Composite Molecular Sieves and Related Crystallization Mechanism

Improvement of the Catalytic Performances of SBA‐15 in the Formylation of Aniline upon the Introduction of Template‐Free Nano‐Faujasite in Its Synthesis Gel

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