Development of intracrystalline mesoporosity in NH4HF2-etched NaY zeolites by surfactant-templating and its effect on toluene adsorption

Feng, Ailing; Mi, Le; Yu, Yang; Cao, Yiping; Yu, Yun; Song, Lixin

doi:10.1016/j.cej.2020.124529

Cited by 28 publications

(3 citation statements)

References 45 publications

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“…6,9−12 Hierarchical porous NaY zeolites with a mesopore size of around 4 nm prepared by Feng et al showed greatly improved toluene adsorption performance compared to conventional NaY zeolite. 10 Tang et al 6 also showed that hierarchical porous ZSM-5 zeolite had better toluene adsorption capacity than conventional ZSM-5 zeolite. These works reported the synthesis of hierarchical porous zeolites and their good VOC adsorption performance but do not provide a complete answer to the question of the roles of micro-and mesopores.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In the last decades, a lot of effort has been put into synthesizing wide-pore and hierarchical porous zeolites for enhancing the diffusion performance. , Hierarchical pores combine the intrinsic microporosity with an auxiliary network of interconnected meso- and/or macropores and can be prepared by direct or post-synthetic strategies . The superior VOC adsorption performance of hierarchical porous zeolites over conventional zeolites is often reported. ,− Hierarchical porous NaY zeolites with a mesopore size of around 4 nm prepared by Feng et al showed greatly improved toluene adsorption performance compared to conventional NaY zeolite . Tang et al also showed that hierarchical porous ZSM-5 zeolite had better toluene adsorption capacity than conventional ZSM-5 zeolite.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Chen,

Jia,

Wang

et al. 2024

Langmuir

View full text Add to dashboard Cite

show abstract

“…However, it is also the micropores that significantly limit the diffusion of VOCs so that their adsorption potential is not fully realized. 8 Later, researchers found some solutions to overcome the diffusion problem of VOCs, such as the synthesis of hierarchical [9][10][11] and nanozeolites. [12][13][14] Changbum Jo et al 12 studied the xylene adsorption performance of MFI-type zeolites with different sizes.…”

Section: Introductionmentioning

confidence: 99%