Hierarchical submicrosized Y zeolites prepared by sequential desilication–dealumination post-synthesis modification and their catalytic performance in vacuum gas oil hydrocracking

Manrique, Cecilia; Solano, Roger; Mendoza, Carlos; Amaya, Sandra; Echavarría, Adriana

doi:10.1039/d3nj05551e

Cited by 2 publications

(2 citation statements)

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“…39 For example, the influences of sequential desilication-dealumination (DES-DEA) and sequential dealumination-desilication (DEA-DES) on the textural and acidic properties of hierarchical zeolite Y were recently explored by Manrique and co-workers. 40 Compared to the pristine zeolite Y, the sequence DEA-DES process exhibited a negligible impact on the overall acid density; however, it enhanced the ratio of strong to weak acid sites. Conversely, the sequential DES-DEA process remarkably reduced the overall acidity concentration while preserving the ratio between strong and weak acid sites.…”

Section: Hierarchical Zeolite Synthesismentioning

confidence: 96%

“…Consequently, several reports illustrate the combination of dealumination and desilication approaches to construct additional large porous structures while preserving acid properties . For example, the influences of sequential desilication-dealumination (DES-DEA) and sequential dealumination-desilication (DEA-DES) on the textural and acidic properties of hierarchical zeolite Y were recently explored by Manrique and co-workers . Compared to the pristine zeolite Y, the sequence DEA-DES process exhibited a negligible impact on the overall acid density; however, it enhanced the ratio of strong to weak acid sites.…”

Section: Hierarchical Zeolite Synthesismentioning

confidence: 99%

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Perspectives on Recent Advances in Hierarchical Zeolites for Bioethanol Conversion to Chemicals, Jet Fuels, and Carbon Nanotubes

Chaipornchalerm,

Prasertsab,

Prasanseang

et al. 2024

Energy Fuels

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Bioethanol, derived from agricultural sources, is considered as one of the promising sustainable alternatives to fossil fuels. Indeed, several catalytic routes can be used to convert bioethanol to valuable chemicals and materials, particularly by employing a zeolite as a catalyst. However, it still suffers from using a conventional zeolite due to the rapid deactivation of the catalyst from pore blockage and acid-site poisoning during bioethanol conversion. To address this challenge, hierarchical zeolites have been explored to enhance molecular diffusion and optimize acidic characteristics, eventually improving catalytic activity and stability. This review provides a comprehensive overview of recent advancements and perspectives in utilizing hierarchical zeolites for bioethanol upgrading. We emphasize the synthesis of hierarchical zeolites and their applications in bioethanol conversion to high-value-added chemicals, such as ethylene, acetaldehyde, butadiene, aromatics, jet fuels, and carbon materials. We highlight both the advantages and challenges associated with hierarchical zeolites as well as the potential for further development of this novel type of catalyst in bioethanol conversion processes.

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Section: Hierarchical Zeolite Synthesismentioning

confidence: 96%

Section: Hierarchical Zeolite Synthesismentioning

confidence: 99%