Silicalite-1 zeolites for toluene sorption: Effects of the particle size and intracrystalline mesopores

Chen, Donghang; Jiang, Zhongyu; Jia, Yongsheng; Wang, Xiaolong; Deng, Wei; Chaianansutcharit, Soamwadee; Zhou, Aimin; Guo, Limin

doi:10.1016/j.micromeso.2023.112596

Cited by 17 publications

(8 citation statements)

References 34 publications

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“…When the size is reduced, the adsorption sites of the zeolite are more exposed. 12,14 Therefore, when the particle size of the zeolite changes from a micrometer level to a nanometer level, especially for NM-Si and NM-Ti-84, their breakthrough time were 2.1 times as long as the commercial zeolite.…”

Section: Resultsmentioning

confidence: 99%

“…8 Later, researchers found some solutions to overcome the diffusion problem of VOCs, such as the synthesis of hierarchical 9–11 and nanozeolites. 12–14 Changbum Jo et al 12 studied the xylene adsorption performance of MFI-type zeolites with different sizes. They found that the breakthrough time for xylene adsorption was more than 2.3 times longer than that of 300 nm-sized zeolites after reducing the crystal thickness of zeolites to 2 nm.…”

Section: Introductionmentioning

confidence: 99%

“…They found that due to the reduction of crystal size, their specific surface area increases, which is more favourable for their adsorption. Chen et al 14 investigated the adsorption performance of silicalite-1 zeolites with different particle sizes on toluene sorption and also found that the decreasing particle size could increase the adsorption breakthrough time. However, when the particle size reached 70 nm, the breakthrough time was shortened due to their low crystallinity.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of nano-MFI zeolites doped with Al/Ti and their performance in VOC sorption

Wang,

Chen,

Jia

et al. 2024

Dalton Trans.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of nano-MFI zeolites doped with Al/Ti and their performance in VOC sorption

Wang,

Chen,

Jia

et al. 2024

Dalton Trans.

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“…For example, the mechanical properties of porous materials are essential for application [31][32][33] but adhesives used in the granulation process can cover some of the active sites on the surface. Unfavorable gases released from electrical devices due to the molecular decomposition, such as volatile organic compounds and H 2 O [34,35], may also preferentially occupy the adsorption sites, leading to poisoning and deactivation of active sites for N 2 adsorption. From the viewpoint of material selection, non-conductive materials are favorable.…”

Section: Resultsmentioning

confidence: 99%

Linear enhancement of mechanical compliance by zeolite filling in a compact loudspeaker

Chen,

Tan,

et al. 2024

J. Phys. D: Appl. Phys.

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The zeolite filled in the rear cavity of compact loudspeaker enhances sound pressure amplitude of loudspeaker system with a frequency range up to ~500 Hz, while its intrinsic mechanisms remain elusive. We theoretically consider the gas adsorption-desorption behaviors on zeolite that can be dynamically perturbated by sound pressure from diaphragm of loudspeaker. By merging equivalent circuit theory with gas thermodynamic theory, a linear relationship between mechanical compliance and zeolite volume in the rear cavity is quantitatively modeled. Confirmed by electro-acoustical impedance experiments, the linear relationship with a slope of 1.92 mF/cm3 reveals the intrinsic ability of porous material to enhance mechanical compliance by gas adsorption onto the zeolite in the rear cavity. This study correlates the kinetic behavior of air molecules on zeolite and acoustic behavior, not only offering a novel insight to improve the performance of the compacted loudspeaker by simple filling of porous material, but also introducing a comprehensive method to evaluate gas adsorption-desorption dynamics in porous media.

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“…For the samples before and after alkali treatment, the more intergranular mesopores, the smaller the particle sizes; 11,19 thus, the order of particle sizes for the three samples is AT-β-2 < AT-β-1 < C-β. The FTIR spectra (Figure 1C) show the information about skeletal vibration.…”

Section: ■ Introductionmentioning

confidence: 98%

Micro- and Mesoporous Structural Effects of Beta Zeolites for Volatile Organic Compound Sorption

Chen,

Jia,

Wang

et al. 2024

Langmuir

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To fully exploit pore engineering in the design of more efficient zeolite adsorbents for volatile organic compound (VOC) treatment, the roles of meso-and micropores need to be clarified to provide the theoretical basis and feasible measures. In this work, the three VOC sorption properties of conventional and hierarchical porous beta zeolites were comparatively investigated to study the roles of meso-and micropores. There is a division of functions between micro-and mesopores, with micropores being the main VOC adsorption sites and mesopores greatly enhancing VOC diffusion and adsorbent reusability. On the one hand, micropores should be preserved as much as possible because obtaining mesopores by sacrificing micropores (i.e., alkali treatment) results in 28−60% decreases in adsorption capacities. On the other hand, mesopore introduction is highly desirable, which results in an enhancement of VOC intraparticle diffusion rates by 1.3−2.3 times (at the VOC concentration of 600 ppm) and chlorobenzene adsorption capacity on the 20th cycle increasing from 78% of the initial value to 89 and 93%. The findings may provide valuable information about zeolite-based adsorbents for adsorption removal or recovery of VOCs.

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Silicalite-1 zeolites for toluene sorption: Effects of the particle size and intracrystalline mesopores

Cited by 17 publications

References 34 publications

Preparation of nano-MFI zeolites doped with Al/Ti and their performance in VOC sorption

Preparation of nano-MFI zeolites doped with Al/Ti and their performance in VOC sorption

Linear enhancement of mechanical compliance by zeolite filling in a compact loudspeaker

Micro- and Mesoporous Structural Effects of Beta Zeolites for Volatile Organic Compound Sorption

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