One-pot green synthesis of Fe-ZSM-5 zeolite containing framework heteroatoms via dry gel conversion for enhanced propylene selectivity of catalytic cracking catalyst

Wang, Youhe; Li, Tingting; Li, Chencan; Lu, Jinzhi; Dai, Chang; Subhan, Fazle; Peng, Peng; Sun, Hongman; Feng, Rui; Zhang, Yan

doi:10.1007/s10853-021-06472-2

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…al. [42] concentrated on the one-pot green synthesis of Fe-ZSM-5 with CaCO3 as a precursor via the dry gel conversion approach and their work indicated high propylene selectivity of the catalyst for cracking experiments. El Samrout et.…”

Section: Bottom-up Approachmentioning

confidence: 99%

Recent Developments on CO2 Hydrogenation Performance over Structured Zeolites: A Review on Properties, Synthesis, and Characterization

Cutad,

Al-Marri,

Kumar

2024

Preprint

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This review focuses on an extensive synopsis of the recent improvements in the field of CO2 hydrogenation over structured zeolites including their properties, synthesis methods, and characterization approaches. The role of bimodal mesoporous structures surface oxygen vacancies, and the Si/Al ratio in improving catalytic activity is highlighted. The porosity, thermal stability, and structural integrity are also discussed in the review along with how structured zeolites are affected by electrical and plasma interactions. The synthesis methods are analyzed in detail by comparing the benefits and drawbacks of the bottom-up techniques, such as hard templating, soft templating, and non-templating on the one side; and the top-down approaches, e.g. dealumination, desilication, and recrystallization on the other. This review also draws attention to the necessity of overcoming the difficulties arising from these synthesis techniques, for example, micropore-induced diffusion restrictions and morphological constraints, employing innovative approaches and optimization strategies. Conventional and advanced characterization techniques are pointed out in this respect as crucial for understanding the catalytic mechanism and the dynamic behavior, hence, beneficial in the advancements of research on structured zeolites with higher efficiency and activity. The review ends with a perspective that highlights the necessity of further research in the improvement of synthesis approaches and characterization procedures of the structured zeolites to increase their catalytic activity in CO2 hydrogenation, a critical process of paramount importance in the global effort to reduce excessive carbon emissions and combat climate change..

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Section: Bottom-up Approachmentioning

confidence: 99%

Recent Developments on CO2 Hydrogenation Performance over Structured Zeolites: A Review on Properties, Synthesis, and Characterization

Cutad,

Al-Marri,

Kumar

2024

Preprint

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“…2,3 ZSM-5 zeolite is one of the promising catalysts for efficient aromatics production from methanol due to its superior hydrothermal stability and unique shape-selectivity. 4,5 However, some severe problems of microporous ZSM-5 in catalysts (for instance, a high rate of carbon deposition and deactivation, and relatively low BTX selectivity in the MTA reaction), significantly limit their industrial applications. 6 To overcome these limitations and improve the catalytic performance, the concept of hierarchical zeolites with intraand intercrystalline macro-meso-microporosity has emerged.…”

Section: Introductionmentioning

confidence: 99%

Novel-ordered hierarchical ZSM-5 zeolite with interconnected macro–meso–microporosity for the enhanced methanol to aromatics reaction

Wang,

Li,

Ouyang

et al. 2024

Catal. Sci. Technol.

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“…Another one is that heteroatoms, especially Fe 3+ ions which tend to form ferric hydroxide precipitation under alkaline condition, cannot be easily introduced into the zeolite framework by employing heteroatomcontaining chemicals as heteroatom sources. 22,23 In our previous works, FeZSM-5 and FeCuSSZ-13 zeolites were successfully synthesized from Fe-containing rectorite and diatomite minerals based on a mesoscale depolymerization-reorganization strategy, and it is critical that the Fe atoms originating from the minerals can be directly introduced into the zeolite framework. [24][25][26] Inspired by these studies, a simple and economical method to introduce point defects into Y zeolite via the incorporation of Fe atoms by using a Fecontaining natural mineral as the raw material is proposed in this article.…”

Section: Introductionmentioning

confidence: 99%

“…One of them is that the evolution from Y zeolite with point defects to USY zeolite has not been comprehensively studied, resulting in the fact that the effect of point defects towards the dealumination of zeolite remains ambiguous. Another one is that heteroatoms, especially Fe 3+ ions which tend to form ferric hydroxide precipitation under alkaline condition, cannot be easily introduced into the zeolite framework by employing heteroatom‐containing chemicals as heteroatom sources 22,23 …”

Section: Introductionmentioning

confidence: 99%

Dealumination of Y zeolite through an economic and eco‐friendly defect‐engineering strategy

Dong

Zhang

et al. 2023

AIChE Journal

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A sustainable defect‐engineering strategy for the dealumination of Y zeolite is described. This strategy includes the green synthesis of a well‐crystallized Y zeolite with point defects arising from the incorporation of Fe atoms by using Fe‐containing perlite and the subsequent preparation of ultra‐stable Y (USY) zeolite by efficient steaming dealumination. The systematic characterizations verify that Fe atoms originally existing in the perlite are incorporated into the as‐synthesized Y zeolite and function as point defects, leading to the distortion of framework Al. The step‐by‐step investigation of dealumination process shows that vacancies are formed by the extraction of framework Fe in ammonium exchange, and the framework dealumination is promoted under the combined effect of the distorted framework Al and the formed vacancies during steaming treatment. The resulting USY zeolite owns excellent features in (hydro)thermal stability, pore structure and acid property, and exhibits outstanding catalytic performance in the cracking of n‐octane and 1,3,5‐triisopropylbenzene.

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One-pot green synthesis of Fe-ZSM-5 zeolite containing framework heteroatoms via dry gel conversion for enhanced propylene selectivity of catalytic cracking catalyst

Cited by 11 publications

References 32 publications

Recent Developments on CO2 Hydrogenation Performance over Structured Zeolites: A Review on Properties, Synthesis, and Characterization

Recent Developments on CO2 Hydrogenation Performance over Structured Zeolites: A Review on Properties, Synthesis, and Characterization

Novel-ordered hierarchical ZSM-5 zeolite with interconnected macro–meso–microporosity for the enhanced methanol to aromatics reaction

Dealumination of Y zeolite through an economic and eco‐friendly defect‐engineering strategy

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