Mass Transfer Behavior of Benzene in Hierarchically Structured ZSM-5

Meng, Xiuxia; Lin, Chunhui; Zhang, Youhua; He, Qingyou; Cao, Shui; Duan, Linhai

doi:10.3389/fchem.2019.00502

Cited by 16 publications

(6 citation statements)

References 26 publications

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“…They are derived from various industrial processes and applications of chemical products. The emissions of VOCs have caused severe environmental and healthy issues causing cancer and death (Zhu et al, 2016, 2019; Meng et al, 2019). Therefore, the reduction of VOCs emissions is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Novel Hierarchical Fe(III)-Doped Cu-MOFs With Enhanced Adsorption of Benzene Vapor

Sun

et al. 2019

Front. Chem.

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New hierarchical Fe(III)-doped Cu-MOFs (Fe-HK) were developed via introduction of Fe3+ ions during HKUST-1 synthesis. The obtained products were characterized by N2 adsorption, X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, FTIR spectroscopy, and thermal analysis. The adsorption isotherms and kinetics of benzene vapor were measured and consecutive adsorption–desorption cycles were performed. It was found that the hierarchical-pore Fe-HK-2 exhibited optimal textural properties with high BET surface area of 1,707 m2/g and total pore volume of 0.93 cm3/g, which were higher than those of the unmodified HKUST-1. Significantly, the hierarchical-pore Fe-HK-2 possessed outstanding benzene adsorption capacity, which was 1.5 times greater than the value on HKUST-1. Benzene diffusivity of Fe-HK-2 was 1.7 times faster than that of parent HKUST-1. Furthermore, the benzene adsorption on Fe-HK-2 was highly reversible. The hierarchical-pore Fe-HK-2 with high porosity, outstanding adsorption capacity, enhanced diffusion rate, and excellent reversibility might be an attractive candidate for VOCs adsorption. This may offer a simple and effective strategy to synthesize hierarchical-pore MOFs by doping with other metal ions.

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Section: Introductionmentioning

confidence: 99%

Novel Hierarchical Fe(III)-Doped Cu-MOFs With Enhanced Adsorption of Benzene Vapor

Sun

et al. 2019

Front. Chem.

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“…In contrast to the synthesis strategies discussed above, additional porosity can also be created within zeolites by postsynthesis treatment of zeolite crystals that leads to the formation of secondary meso-macropores. − Generally, the postsynthesis treatments of previously formed zeolites consist of demetalation (extraction of framework atoms) or delamination, which are realized by steam, − acid, ,− base, − ,− or fluoride treatments ,− or more refined approaches such as swelling, − exfoliating, , or interlayer pillaring with amorphous silica. …”

Section: Synthesismentioning

confidence: 99%

Hierarchically Structured Zeolites: From Design to Application

et al. 2020

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Hierarchical zeolites combine the intrinsic catalytic properties of microporous zeolites and the enhanced access and transport of the additional meso-and/or macroporous system. These materials are the most desirable catalysts and sorbents for industry and become a highly evolving field of important current interests. In addition to the enhanced mass transfer leading to high activity, selectivity, and cycle time, another essential merit of the hierarchical structure in zeolite materials is that it can significantly improve the utilization effectiveness of zeolite materials resulting in the minimum energy, time, and raw materials consumption. Substantial progress has been made in the synthesis, characterization, and application of hierarchical zeolites. Herein, we provide an overview of recent achievements in the field, highlighting the significant progress in the past decade on the development of novel and remarkable strategies to create an additional pore system in zeolites. The most innovative synthesis approaches are reviewed according to the principle, versatility, effectiveness, and degree of reality while establishing a firm link between the preparation route and the resultant hierarchical pore quality in zeolites. Zeolites with different hierarchically porous structures, i.e., micro-mesoporous structure, micromacroporous structure, and micro-meso-macroporous structure, are then analyzed in detail with concrete examples to illustrate their benefits and their fabrications. The significantly improved performances in catalytic, environmental, and biological applications resulting from enhanced mass transport properties are discussed through a series of representative cases. In the concluding part, we envision the emergence of "material-properties-by-quantitative and real rational design" based on the "generalized Murray's Law" that enables the predictable and controlled productions of bioinspired hierarchically structured zeolites. This Review is expected to attract important interests from catalysis, separation, environment, advanced materials, and chemical engineering fields as well as biomedicine for artificial organ and drug delivery systems.

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“…No use, distribution or reproduction is permitted which does not comply with these terms. Lin C, Zhang Y, Qin H, Cao S and Duan L (2019)…”

Section: Author Contributionsmentioning

confidence: 99%

“…They are derived from various industrial processes and applications of chemical products. The emissions of VOCs have caused severe environmental and healthy issues causing cancer and death (Zhu et al, 2016(Zhu et al, , 2019Meng et al, 2019). Therefore, the reduction of VOCs emissions is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Zeolite Chemistry and Applications

2020

Frontiers Research Topics

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Mass Transfer Behavior of Benzene in Hierarchically Structured ZSM-5

Cited by 16 publications

References 26 publications

Novel Hierarchical Fe(III)-Doped Cu-MOFs With Enhanced Adsorption of Benzene Vapor

Novel Hierarchical Fe(III)-Doped Cu-MOFs With Enhanced Adsorption of Benzene Vapor

Hierarchically Structured Zeolites: From Design to Application

Zeolite Chemistry and Applications

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