Synthesis of ZSM-22/SAPO-11 composite molecular sieve-based catalysts with small crystallites and superior n-alkane hydroisomerization performance

Wang, Xue‐Man; Wen, Chenglong; Fan, Yu

doi:10.1016/j.petsci.2023.03.002

Cited by 6 publications

(4 citation statements)

References 41 publications

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“…At the same time, as the loading of ZSM-5 molecular sieve gradually increases, it can be seen that the particles on its surface gradually increase, and gradually from dispersion to aggregation.This further demonstrated the successful preparation of SZA composite catalyst. [30] Figure 8. SEM characterization of composite SZA catalyst (a)20%SZA; (b)30%SZA; (c)40%SZA.…”

Section: Effect Of Template Agent Dosage On the Synthesis Of Sapo-11 ...mentioning

confidence: 99%

Preparation and n-hexadecane hydroisomerization properties of SAPO-11 based composite molecular sieve

Tuo,

Liu,

et al. 2024

Preprint

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In this work, SAPO-11, SAPO-11-γ-Al2O3 and SAPO-11-ZSM-5-γ-Al2O3 molecular sieve supports were prepared by static hydrothermal synthesis, which SAPO-11-γ-Al2O3 and SAPO-11-ZSM-5-γ-Al2O3 supports were loaded with Co and Mo as active metal components. The hydroisomerization properties of n-hexadecane on SAPO-11, SAPO-11-γ-Al2O3 and SAPO-11-ZSM-5-γ-Al2O3 molecular sieves were investigated, as well as the effects of reaction temperature, reaction time, solid-liquid ratio and reaction pressure on the hydroisomerization properties. The results showed that the SAPO-11 molecular sieves under the conditions Al2O3: H3PO4: DPA: SiO2: H2O = 1:2:1.2:0.6:55, a crystallization time of 48 h, and crystallization temperature of 180 ℃ were synthesized, had a higher degree of crystallinity and uniform size distribution, and the pore structure was more obvious. After the metal-loaded SAPO-11-γ-Al2O3 molecular sieves due to the charged metal blocked part of the pore or pore opening of the molecular sieve, resulting in the reduction of the specific surface area and pore volume, some of their acidic sites are blocked occupied by the metal and the acid is weakened. The results of the hydroisomerization experiments showed that SAPO-11 molecular sieves the isoparaffin selectivity and isoparaffin yield reached maximum values of 31.26% and 28.32% at 340 ℃, 60 min, respectively. The selectivity and yield reached maximum of 51.02% and 43.76% at liquid-solid ratio up to 25:1. The selectivity and yield reached maximum values of 55.82% and 51.2% at an initial reaction pressure of 5 MPA. For the SAPO-11-γ-Al2O3 supports, the selectivity and yield the maximum values of 79.50% and 71.49% at a metal Co: Mo loading ratio of 1:3 was achieved. For the SAPO-11-ZSM-5-γ-Al2O3 supports, the selectivity and yield the maximum values of 55.44% and 54.05% were achieved with ZSM-5 loading of 30 wt%. These catalysts have the potential for a wide range of applications.

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Section: Effect Of Template Agent Dosage On the Synthesis Of Sapo-11 ...mentioning

confidence: 99%

Preparation and n-hexadecane hydroisomerization properties of SAPO-11 based composite molecular sieve

Tuo,

Liu,

et al. 2024

Preprint

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“…Hydroisomerization of deoxygenation products (e.g., straight-chain hydrocarbons) occurs on acid sites of to form iso-paraffins, which are favorable for improving the low-temperature fluidity of bio-diesel. 5 For example, Ni/ SAPO-11 catalysts exhibit a high conversion of oleic acids (i.e., 100%) and a yield of iso-paraffin fractions (i.e., 35%). 6 Normally, SAPO-11 molecular sieves are synthesized from silicoaluminophosphate precursor gels under hydrothermal conditions.…”

Section: Introductionmentioning

confidence: 99%

“…, straight-chain hydrocarbons) occurs on acid sites of SAPO-11 to form iso-paraffins, which are favorable for improving the low-temperature fluidity of bio-diesel. 5 For example, Ni/SAPO-11 catalysts exhibit a high conversion of oleic acids ( i.e. , 100%) and a yield of iso-paraffin fractions ( i.e.…”

Section: Introductionmentioning

confidence: 99%

Ultra-fast synthesis of hierarchical SAPO-11 molecular sieves with the assistance of hydroxyl radicals

Zheng,

Liu,

Shan

et al. 2024

Dalton Trans.

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“…To improve the catalytic performance, bifunctional catalysts with mixed acidic supports were also studied. ,− In particular, the development of composite molecular sieves has become a research hot spot. , For example, a series of composite molecular sieves, such as Pt/Beta-MCM-41, Pt/MOR-MCM-4, Pt/beta-KIT-6, and Pt/HZSM-5-HMS, were prepared and applied in hydroisomerization of n -alkanes. Since these composite molecular sieves own a reasonable distribution of acidity, good shape selectivity, and hydrothermal stability, they generally exhibit higher selectivity, stability, and activity than those of the corresponding single molecular sieves.…”

Section: Introductionmentioning

confidence: 99%

Isomerization of n-Dodecane for High Selectivity of Multibranched Iso-dodecane over Pt/ZSM-22 – Y Catalyst

Liu,

Yang,

Song

et al. 2023

Ind. Eng. Chem. Res.

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Synthesis of ZSM-22/SAPO-11 composite molecular sieve-based catalysts with small crystallites and superior n-alkane hydroisomerization performance

Cited by 6 publications

References 41 publications

Preparation and n-hexadecane hydroisomerization properties of SAPO-11 based composite molecular sieve

Preparation and n-hexadecane hydroisomerization properties of SAPO-11 based composite molecular sieve

Ultra-fast synthesis of hierarchical SAPO-11 molecular sieves with the assistance of hydroxyl radicals

Isomerization of n-Dodecane for High Selectivity of Multibranched Iso-dodecane over Pt/ZSM-22 – Y Catalyst

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