Shape-selective catalysts of Mg2+ ion exchange modified SAPO-11 molecular sieves for alkylation of 2-methylnaphthalene

Ye, Runping; Liu, Qinghua; Wen, Zhihui; Jiang, Lejie; Jin, Chengkai; Gao, Birong; Zhang, Bin; Zhang, Rongbin; Qin, Yong; Feng, Gang

doi:10.1016/j.micromeso.2022.112291

Cited by 3 publications

(2 citation statements)

References 42 publications

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“…Generally, researchers compare the ionothermal method to the hydrothermal process to discover novel morphologies for specific applications. As shown in Figure 7, in the hydrothermal synthesis, the morphologies of AEL structure, including Aluminophosphate (AlPO-11), Silicoaluminophosphate (SAPO-11), and Metallophosphate (MgAlPO-11) mostly appear as spherical crystals [97][98][99][100]. However, when the same materials are prepared by the ionothermal synthesis method, they appear in different forms, such as needle-like [ 92,93] or rod-like crystals [101].…”

Section: The Effect Of Il's Cation Size Shape or Lengthmentioning

confidence: 99%

A review on ionothermal synthesis of zeolites and zeotype materials

Fortas,

Boukoussa,

Hasnaoui

et al. 2024

Phys. Scr.

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Known as green inorganic products and environmentally beneficial, ionic liquids (ILs) are increasingly used in the ionothermal synthesis of zeolites and zeotype materials compared to the hydrothermal method. This safe and successful process offers new opportunities to produce several molecular sieves with different morphologies and structures for promising applications.In this review, we summarize the history of the most successful phases of zeolites and zeotype materials, with different structures such as AEL, AEI, AFI, AST, ATS, CHA, -CLO, ITW, LEV, LTA, MFI, MTN, MTT, SOD, TON, IRR, and STW, from ILs discovery until 2022. The use of the ionothermal method compared to the hydrothermal route is evaluated and reported in this paper, besides synthesis parameters affecting the final product formation, such as IL dosage, cation size and shape, water content, (P, Si, F, IL/Al) ratios, crystallization time and temperature, mineralizing agent, Me/Al ratio, the addition of a secondary template (co-SDA), the use of IL as both SDA and solvent, competition in forming the framework, and the use of eutectic mixture and deep eutectic solvent (DES). Furthermore, we collected the various applications of these materials and highlighted the advantages of the ionothermal process, offering a comprehensive understanding of this topic.

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Section: The Effect Of Il's Cation Size Shape or Lengthmentioning

confidence: 99%

A review on ionothermal synthesis of zeolites and zeotype materials

Fortas,

Boukoussa,

Hasnaoui

et al. 2024

Phys. Scr.

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“…The comodification of Pt and NH 4 F improved the catalytic activity and target product selectivity. Ye et al 29 have investigated the effect of magnesium ion-exchange modified catalysts on the 2-MN alkylation. After modification, some acid sites of the molecular sieves were made to change, thus affecting the reactivity and stability.…”

Section: Introductionmentioning

confidence: 99%

Methylation of Naphthalene with Methanol over the Al-Modified SiO₂ Zeolite Catalysts

Zhong,

Xu,

et al. 2024

Ind. Eng. Chem. Res.

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2,6-Dimethylnaphthalene (2,6-DMN) is a crucial intermediate in the synthesis of poly(ethylene naphthalate), a heatresistant insulating material. The key to synthesizing 2,6-DMN is the development of highly active catalysts, which still remains challenging. Herein, bare SiO 2 and a series of Al-modified SiO 2 catalysts (denoted as Al-SiO 2 ) were successfully synthesized through a hydrothermal method using sodium metaaluminate as the Al source. The prepared catalysts were used for catalytic alkylation of naphthalene, and it was found that the Al-doped SiO 2 exhibited better catalytic activity than bare SiO 2 . The main reason is ascribed to the increased acid sites for Bronsted and Lewis acids with the incorporation of Al. Among the Al-modified SiO 2 samples, the amount of weak and total acidities was the highest for the 30Al-SiO 2 sample. In addition, the reaction conditions over this prepared catalyst were studied and optimized. The results showed that it exhibited the highest activity when the temperature was 300 °C and the weight hourly space velocity was 1 h −1 . Furthermore, density functional theory calculations showed that the doping of Al into SiO 2 enhanced the adsorption of methanol, resulting in a faster rate of formation of methoxylated material in the first step. Besides, methylation at the 6 position was slightly preferred compared to that at the 7 position, in line with the experimental results.

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Efficient microwave regeneration of iron-modified Na-based montmorillonite and Na-based attapulgite for enhanced adsorption of tetracycline in water

Zhou,

Jiang,

Yang

et al. 2024

Journal of Environmental Chemical Engineering

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Shape-selective catalysts of Mg2+ ion exchange modified SAPO-11 molecular sieves for alkylation of 2-methylnaphthalene

Cited by 3 publications

References 42 publications

A review on ionothermal synthesis of zeolites and zeotype materials

A review on ionothermal synthesis of zeolites and zeotype materials

Methylation of Naphthalene with Methanol over the Al-Modified SiO₂ Zeolite Catalysts

Efficient microwave regeneration of iron-modified Na-based montmorillonite and Na-based attapulgite for enhanced adsorption of tetracycline in water

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Shape-selective catalysts of Mg2+ ion exchange modified SAPO-11 molecular sieves for alkylation of 2-methylnaphthalene

Cited by 3 publications

References 42 publications

A review on ionothermal synthesis of zeolites and zeotype materials

A review on ionothermal synthesis of zeolites and zeotype materials

Methylation of Naphthalene with Methanol over the Al-Modified SiO2 Zeolite Catalysts

Efficient microwave regeneration of iron-modified Na-based montmorillonite and Na-based attapulgite for enhanced adsorption of tetracycline in water

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Methylation of Naphthalene with Methanol over the Al-Modified SiO₂ Zeolite Catalysts