HZSM-5 zeolite modification and catalytic reaction mechanism in the reaction of cyclohexene hydration

Tian, Hui; Liu, Shuai; Liu, Qing

doi:10.1039/d2ra04285a

Cited by 7 publications

(5 citation statements)

References 40 publications

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“…The isomerization transformation is initiated by the proton attack on the methyl group within the bridging hydroxyl group in the Al–OH–Si structure. 51–54…”

Section: Resultsmentioning

confidence: 99%

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Catalytic performance and mechanism study of the isomerization of 2,5-dichlorotoluene to 2,4-dichlorotoluene

Ma,

Meng,

Chen

et al. 2024

RSC Adv.

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“…The isomerization transformation is initiated by the proton attack on the methyl group within the bridging hydroxyl group in the Al–OH–Si structure. 51–54…”

Section: Resultsmentioning

confidence: 99%

“…The isomerization transformation is initiated by the proton attack on the methyl group within the bridging hydroxyl group in the Al-OH-Si structure. [51][52][53][54] The pathway diagram for the DCT isomerization reaction is illustrated in Fig. 6d.…”

Section: Simulation Calculationmentioning

confidence: 99%

Catalytic performance and mechanism study of the isomerization of 2,5-dichlorotoluene to 2,4-dichlorotoluene

Ma,

Meng,

Chen

et al. 2024

RSC Adv.

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“…Tian et al previously elucidated that HCl treatment can extract particular quantities of Al from the zeolite framework, significantly augmenting the specific surface area. [ 21 ] Conversely, bifunctional catalysts exhibit a decline in this measure, a phenomenon ascribed to metal dispersion within the catalyst's pores and on its surface. [ 22,23 ] The agglomeration and expansion of metal oxides during the calcination phase lead to a compromise in certain micropores, thereby reducing the zeolite's specific surface area.…”

Section: Resultsmentioning

confidence: 99%

Hydrocracking Rubber Seeds Oil for Biofuel Production Using Bifunctional Sarulla‐Derived Natural Zeolite–Ni and Ni–Mo/SNZ Catalyst

Sihombing,

Kembaren,

Herlinawati

et al. 2024

Energy Tech

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Rubber seeds, due to their rich vegetable oil content, emerge as a promising substrate for biofuel production. Harnessing the progressive catalytic hydrocracking methodology, this research delves into the activation of Sarulla‐derived natural zeolite followed by Ni and Ni–Mo metal impregnation, subsequently subjecting rubber seed oil to hydrocracking at 400, 450, and 500 °C under atmospheric pressure at 0.1 MPa. Zeolite characteristics undergo notable transformations postmetal impregnation. Importantly, at 500 °C, gasoline fraction selectivity exhibits superior efficacy, with the Ni/SNZ‐A catalyst demonstrating consistently high selectivity (>85%) across varied temperatures. Posthydrocracking reveals an amplification in n‐paraffin, aromatic, olefin, and methyl ester profiles to 19.6%, 7.3%, 25.7%, and 17.7%, respectively, contrasting the diminution of cycloparaffin, carboxylic acid, and ketones to 3.6%, 0.2%, and 2.5%, respectively. The aforementioned discoveries hold significant importance in the realm of further investigation into the generation of gasoline fractions through the utilization of natural zeolite catalysts and the incorporation of metals with lower mass, all conducted under atmospheric pressure conditions with the ultimate objective of mitigating production expenses.

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“…Because of its superior catalytic activity and thermal stability, ZSM-5 molecular sieve has become the primary catalyst source for the commercial synthesis of cyclohexanol [17][18][19]. To be acceptable for use in industrial reactors, ZSM-5 molecular sieve catalysts must meet speci c requirements for strength and shape, as well as strong abrasion resistance and hydrothermal stability.…”

Section: Introductionmentioning

confidence: 99%

A study of ZSM-5 molecular sieve shaping for an innovative cyclohexene hydration process

Wang,

Jin,

Zhang

et al. 2024

Preprint

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The development of the zeolite molecular sieves (ZSM-5) molding technique is essential for the cyclohexene hydration reaction distillation process in both industrial and rcarch settings. The reactive distillation process can solve many of the drawbacks associated with the existing technique of manufacturing cyclohexanol via cyclohexene hydration, such as high catalyst digestibility, low conversion rate, and operational challenges. In this thesis, a series of molded ZSM-5 catalysts with various binder types and contents were constructed. The suggested pseudo-boehmite and hydroxypropyl methylcellulose were chosen as binders for extrusion molding of ZSM-5. The effects of binders on the strength reliability were investigated by strength tests and statistical analysis of the Weibull function. The effects of binders on the physical structure, acidity, and catalytic performance of ZSM-5 were investigated by X-ray diffraction, scanning electron microscopy, physical adsorption of N2, and desorption of NH3. The findings demonstrate that the addition of binder has no effect on ZSM-5's crystal structure. The experiment's results showed that the molded catalyst could be used for the hydration process with over 95% selectivity and a yield of 10.45% cyclohexanol.

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HZSM-5 zeolite modification and catalytic reaction mechanism in the reaction of cyclohexene hydration

Abstract: This study investigated a three-phase (liquid–liquid–solid) reaction system of cyclohexene hydration where the catalyst was hydrophilic at the bottom of the water phase.

Cited by 7 publications

References 40 publications

Catalytic performance and mechanism study of the isomerization of 2,5-dichlorotoluene to 2,4-dichlorotoluene

Catalytic performance and mechanism study of the isomerization of 2,5-dichlorotoluene to 2,4-dichlorotoluene

Hydrocracking Rubber Seeds Oil for Biofuel Production Using Bifunctional Sarulla‐Derived Natural Zeolite–Ni and Ni–Mo/SNZ Catalyst

A study of ZSM-5 molecular sieve shaping for an innovative cyclohexene hydration process

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