Influence of Synthesis Conditions on the Mesopore Distribution and Morphology Control of Hierarchical ZSM‐5 Zeolites Synthesized by Double‐Acyloxy Organosilane Surfactants

Han, Jiaji; Li, Dongliang

doi:10.1002/ejic.201500735

Cited by 9 publications

(5 citation statements)

References 32 publications

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“…Under optimized conditions, mesoporous volumes up to 0.19 cm 3 g −1 were achieved. 72 3.3. Hierarchical Zeolites by Surfactants with Multiple Quaternary Ammonium Centers.…”

Section: Chemistry Of Materialsmentioning

confidence: 99%

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Surfactant-Templating of Zeolites: From Design to Application

2017

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Surfactant-templating is one of the most effective and versatile synthetic strategies for the construction of well-defined porous architectures in solids. Though the principles of molecular self-assembly were disclosed in biological systems since long, the use of amphiphiles to generate porous architectures in inorganic matter has merely emerged at the very end of the 20 th century. The present review proposes a voyage from the early developments of surfactanttemplating for designing ordered mesoporous solids to the application of its principles for the generation of hierarchical zeolites. A thorough overview on the various strategies employing supramolecular chemistry to designing mesoporosity in zeolites is presented. The efficiency of the post-synthetic surfactant-templating approach in bridging the gap between zeolites and amorphous mesoporous molecular sieves is depicted through assessing their key properties, such as hydrothermal stability, texture, and acidity. Finally, the impact of hierarchical zeolites in the industry will be highlighted through a review of the catalytic performance of mesostructured zeolites as components of FCC catalysts in various refineries.

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“…Under optimized conditions, mesoporous volumes up to 0.19 cm 3 g −1 were achieved. 72 3.3. Hierarchical Zeolites by Surfactants with Multiple Quaternary Ammonium Centers.…”

Section: Chemistry Of Materialsmentioning

confidence: 99%

“…Shortly thereafter, the authors studied the influence of varying both the chain length of the BTDAI-type surfactants and its concentration in the synthesis mixture. Under optimized conditions, mesoporous volumes up to 0.19 cm 3 g –1 were achieved …”

Section: Surfactant-oriented Strategies For Achieving Mesoporous Zeol...mentioning

confidence: 99%

Surfactant-Templating of Zeolites: From Design to Application

2017

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“…And the ZSM-5 pore size distribution agrees with it (Figure 10C). At the same time, there is a typical H4 hysteresis loop in the isotherm at high relative pressure, which is the result of the adsorption and desorption of N 2 in the mesoporous (Han and Liu, 2015; Chu et al, 2016). During the preparation of FC zeolite, the specific surface area (S total ) and micropore volume (V micro ) have different degrees of reduction, but the mesoporous specific surface area (S meso ) and mesopore volume (V meso ) increased to 136.6 [m 2 g −1 ], 0.3455 [m 3 g −1 ], respectively, this can greatly facilitate the rapid diffusion of the product to the catalyst surface and reduce the formation of coke.…”

Section: Resultsmentioning

confidence: 99%

Effect of Surface Structure and Adsorption Activity on Implanting of b-Oriented ZSM-5 Zeolite Film on Modified α-Quartz Substrate

et al. 2019

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b-oriented ZSM-5 zeolite film was synthesized on the macropore α-quartz substrate modified with titanium dioxide (TiO2), polyvinyl acetate (PVA), and chitosan (CTS) by hydrothermal crystallization. By comparing the binding energy and b-oriented angle of zeolite film on each modified α-quartz substrate, the orientations, and combinations derived from structure-adsorption relationship were investigated with Material Studio simulation. Furthermore, the effects of calcination temperature and ultraviolet (UV) irradiation time on the surface structure and adsorption activity of TiO2 coating were studied. The increase adsorption potential energy and the formation of Ti-O-Si bind between zeolite crystal phase and substrate facilitate the continuous and uniform zeolite film growth. The TiO2 interlayer with anatase phase after UV irradiation presents a smooth surface with high Ti-OH density, consequently to high selectivity of b-orientation growth for the ZSM-5 crystals. Compared with the traditional ZSM-5, the higher stability has been exhibited with b-oriented ZSM-5 film /TiO2/α-quartz in the MTA reaction, and the methanol conversion and BTX selectivity remained higher than 90 and 70%, after 6 h reaction.

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“…And the ZSM-5 pore size distribution agrees with it (Figure 10C). At the same time, there is a typical H4 hysteresis loop in the isotherm at high relative pressure, which is the result of the adsorption and desorption of N 2 in the mesoporous (Han and Liu, 2015;. During the preparation of FC zeolite, the specific surface area (S total ) and micropore volume (V micro ) have different degrees of reduction, but the mesoporous specific surface area (S meso ) and mesopore volume (V meso ) increased to 136.6 [m 2 g −1 ], 0.3455 [m 3 g −1 ], respectively, this can greatly facilitate the rapid diffusion of the product to the catalyst surface and reduce the formation of coke.…”

Section: Textural Propertiesmentioning

confidence: 98%

Zeolite Chemistry and Applications

2020

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Influence of Synthesis Conditions on the Mesopore Distribution and Morphology Control of Hierarchical ZSM‐5 Zeolites Synthesized by Double‐Acyloxy Organosilane Surfactants

Cited by 9 publications

References 32 publications

Surfactant-Templating of Zeolites: From Design to Application

Surfactant-Templating of Zeolites: From Design to Application

Effect of Surface Structure and Adsorption Activity on Implanting of b-Oriented ZSM-5 Zeolite Film on Modified α-Quartz Substrate

Zeolite Chemistry and Applications

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