Fabrication of BEA/MFI zeolite nanocomposites by confined space synthesis

Wang, Jing; Yang, Mingsheng; Zhang, Jianbo; Zhang, Shengping; Wang, Xiaoxiao; Fu, Ke; Wang, Manyun; Shang, Wenjin; Chen, Huiyong; Ma, Xiaoxun

doi:10.1016/j.matchemphys.2017.12.062

Cited by 11 publications

(3 citation statements)

References 46 publications

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“…Considerable efforts have been devoted to the fabrication of hierarchical ZSM-5, such as dealumination and desilication, , recrystallization, assembly of zeolite nanocrystals, hard template method, confined space synthesis, − and soft template method . In contrast to the other methods, the soft template method shows particular advantages in the controllability of mesopore sizes and flexibility of product structures.…”

Section: Introductionmentioning

confidence: 99%

Organosilane Surfactant-Directed Synthesis of Hierarchical ZSM-5 Zeolites with Improved Catalytic Performance in Methanol-to-Propylene Reaction

Chen

Yang

Shang

et al. 2018

Ind. Eng. Chem. Res.

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The hierarchical ZSM-5 zeolites with interconnected meso-/microporosity have been successfully synthesized by using the commercial organosilane surfactant TPOAC as the mesopore structure-directing agent, and the influence of the TPOAC/SiO 2 ratio in the initial synthesis gel on the crystallinity, hierarchical structure, and acidity of the obtained hierarchical ZSM-5 zeolites were systematically investigated through a combination of XRD, FTIR, SEM, TEM, N 2 adsorption, TGA, ICP, and NH 3 -TPD techniques. The catalytic performance was evaluated by the methanol-to-propylene (MTP) reaction, and the obtained results indicated that the hierarchical ZSM-5 catalysts directed by TPOAC exhibited significant enhancement in the catalytic performance reflected at activity, lifetime, product yield, P/E ratio, and coke toleration by virtue of their superior meso-/micropore interconnectivity and appropriately weakened acidity, comparing with the commercial bulky ZSM-5 and the conventional sole micropore ZSM-5.

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Section: Introductionmentioning

confidence: 99%

Organosilane Surfactant-Directed Synthesis of Hierarchical ZSM-5 Zeolites with Improved Catalytic Performance in Methanol-to-Propylene Reaction

Chen

Yang

Shang

et al. 2018

Ind. Eng. Chem. Res.

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“…According to previous studies, this method can effectively improve the mesoporosity of FAU, and thus promote the mass-transfer process within its pores [27]. Carbon has been widely used as the inert matrix in this approach, and the ideal hierarchical porosity of zeolite has reportedly been obtained by calcinating the carbon at high temperature [26,28,29]. However, these methods require high-temperature calcination to remove the carbon in order to produce new pores, a requirement that not only wastes the carbon materials but also consumes energy and generates greenhouse gases.…”

Section: Introductionmentioning

confidence: 99%

A Mesoporous Faujasite Prepared by Space-Confined Method for Highly Effective Selectivity of Copper Ions

Chen

Wei

Dong

et al. 2022

Water

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The discharge of copper ion (Cu(II)) into natural waters can lead to serious environmental and health problems; however, an abundantly porous hierarchical adsorbent, such as faujasite (FAU), can rapidly remove unwanted Cu(II). In this research, a hierarchically structured, abundantly mesoporous faujasite (FAU) was fabricated from industrial-waste lithium-silicon powder (LSP), with the addition of biochar and graphene oxide (GO) via hydrothermal synthesis without high-temperature calcination. The results demonstrated that just a small amount of biochar or GO can significantly improve the mesopore volume (0.14 cm³/g) and the Cu(II) adsorption capacity (115.65 mg/g) of composite FAU. In particular, careful examination of the properties of the composite FAU showed that the biochar and GO had favorably affected the growth of the zeolite crystals, thus promoting the formation of the FAU skeleton structure, ion-exchange sites and Si-OH. The composite FAU exhibited superior adsorption capacities and highly effective Cu(II) selectivity. Thus, the findings of this study provide a novel and cost-effective avenue for the synthesis of composite FAU with high copper-selective removal capacity.

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“…[9]. Usually, amines or quaternary ammonium salts are added to direct the formation of a particular porous framework structure [10][11][12]. So far, there are more than 40 AlPO-n based porous frameworks that have been identified [13].…”

Section: Introductionmentioning

confidence: 99%

Effects of various alkali metal cations on the synthesis, crystallization and catalytic properties of NKX-2 aluminophosphites

Abdullahi

Wong

Lim

et al. 2019

Materials Chemistry and Physics

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Alkali metal-containing NKX-2 (M-NKX-2) aluminophosphite crystals were hydrothermally synthesized in the Al2O3-P2O5-Me2O-H2O system for the first time using various alkali metal hydroxides (MOH: M = Li, Na, K, Cs). The results showed that NKX-2 crystalline phase could be obtained within several hours without using harmful organic amine structure-directing agent. In addition, the alkali metal hydroxides played an important role in controlling the crystallization rate and the morphology of M-NKX-2 particles in aqueous medium. The resulting M-NKX-2 solids possessed basicity which was catalytically active in base-catalyzed cyanoethylation reaction of methanol.

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Fabrication of BEA/MFI zeolite nanocomposites by confined space synthesis

Cited by 11 publications

References 46 publications

Organosilane Surfactant-Directed Synthesis of Hierarchical ZSM-5 Zeolites with Improved Catalytic Performance in Methanol-to-Propylene Reaction

Organosilane Surfactant-Directed Synthesis of Hierarchical ZSM-5 Zeolites with Improved Catalytic Performance in Methanol-to-Propylene Reaction

A Mesoporous Faujasite Prepared by Space-Confined Method for Highly Effective Selectivity of Copper Ions

Effects of various alkali metal cations on the synthesis, crystallization and catalytic properties of NKX-2 aluminophosphites

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