Melting-assisted solvent-free synthesis of SAPO-11 for improving the hydroisomerization performance of n-dodecane

Yu, Guanlong; Chen, Xinqing; Xue, Wenjie; Ge, Lixia; Wang, Ting; Qiu, Minghuang; Wei, Wei; Gao, Peng; Sun, Yuhan

doi:10.1016/s1872-2067(19)63466-2

Cited by 37 publications

(14 citation statements)

References 42 publications

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“…5 shows the Py-IR spectra of the SAPO-11 molecular sieves, and the peaks at 1540 cm −1 and 1450 cm −1 are attributed to pyridine molecules adsorbed on the SAPO-11 molecular sieve B and L acid sites, respectively. 1 The total amount of B acid and L acid and medium and strong B acid and L acid can be calculated from the Py-IR spectra at 200 °C and 350 °C, respectively. The acid amounts of different SAPO-11 molecular sieves calculated according to Py-IR are shown in Table 2.…”

Section: Resultsmentioning

confidence: 99%

“…Hydroisomerization is one of the most important catalytic processes in the petroleum chemical industry, and is mainly used to produce high quality petroleum products such as high quality fuel oil and high grade lubricating oil. 1–6 Hydroisomerization catalysts are usually metal-acid bifunctional catalysts, where the metal active centers play a role in hydrogenation and dehydrogenation, and the acidic active centers play a role in isomerization. 7–10 SAPO-11 molecular sieves have been widely used in hydroisomerization due to their mild acidity and appropriate pore structure, and have high activity and selectivity for isomerization of hydrocarbons as an acidic active center.…”

Section: Introductionmentioning

confidence: 99%

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Hydroisomerization of 1-octene utilizing hierarchical SAPO-11-supported Ni catalysts: effect of the alkyl chain length of the mesoporogen

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydroisomerization of 1-octene utilizing hierarchical SAPO-11-supported Ni catalysts: effect of the alkyl chain length of the mesoporogen

et al. 2022

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“…In addition, more (002) crystal planes were exposed meaning more acidic sites could be provided. The results of N2 adsorption-desorption showed that Hierarchically porous SAPO-11 zeolites were also prepared by this method [47]. It was discovered that high crystallinity and uniform morphology were retained after etching by solid oxalic acid.…”

Section: Up-down Strategymentioning

confidence: 95%

“…Therefore, it was preferable to etch them after treatment with solid oxalic acid to form a layered structure with a butterfly pattern. Hierarchically porous SAPO-11 zeolites were also prepared by this method [47]. It was discovered that high crystallinity and uniform morphology were retained after etching by solid oxalic acid.…”

Section: Up-down Strategymentioning

confidence: 99%

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A Brief Review on Solvent-Free Synthesis of Zeolites

2021

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The traditional hydrothermal method to prepare zeolite will inevitably use a large amount of water as a solvent, which will lead to higher autogenous pressure, low efficiency, and wastewater pollution. The solvent-free method can be used to synthesize various types of zeolites by mechanical mixing, grinding, and heating of solid raw materials, which exhibits the apparent advantages of high yield, low pollution, and high efficiency. This review mainly introduces the development process of solvent-free synthesis, preparation of hierarchical zeolite, morphology control, synthesis mechanism and applications of solvent-free methods. It can be believed that solvent-free methods will become a research focus and have enormous industrial application potential.

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In‐situ Synthesis of Gallium‐Containing SAPO‐11 Molecular Sieves and Superior Catalytic Performance of Their NiWS Supported Catalysts for Hydroisomerization of n‐Hexadecane

Dai

Cheng

et al. 2022

Eur J Inorg Chem

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In order to prepare a high-performance based non-noble metal supported catalyst for the hydroisomerization of long-chain n-alkanes, gallium-modified SAPO-11 molecular sieve was successfully synthesized by the in-situ synthesis method, and the NiWS supported catalyst was prepared for the hydroisomerization of n-hexadecane. The effects of Ga-modification on the physicochemical properties of SAPO-11 molecular sieve, the active phase properties, and the catalytic performance of the catalyst were studied. Through a series of physicochemical characterizations, it was found that the introduction of Ga increased the mesoporous volume of SAPO-11 molecular sieve, reduced their acid density and strength, but improved the amount of medium-strong Brønsted acid. The Ga-modification weakened the interaction between the active metals and the support, increased the sulfidation degree of active metals, and increased the stacking number and dispersion of active phase. The results of catalytic performance evaluation showed that the catalytic activity and isomerization selectivity of the Ga-modified SAPO-11 molecular sieve based catalysts were improved, and the yield of i-hexadecane of NiW/2Ga-SAPO-11 was the highest, which was 40.30 % higher than that of NiW/SAPO-11. By analyzing the distribution of isomeric products, it was found that the Ga-modified SAPO-11 molecular sieve was helpful in improving the hydroisomerization depth of n-hexadecane over the catalyst.

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Melting-assisted solvent-free synthesis of SAPO-11 for improving the hydroisomerization performance of n-dodecane

Cited by 37 publications

References 42 publications

Hydroisomerization of 1-octene utilizing hierarchical SAPO-11-supported Ni catalysts: effect of the alkyl chain length of the mesoporogen

Hydroisomerization of 1-octene utilizing hierarchical SAPO-11-supported Ni catalysts: effect of the alkyl chain length of the mesoporogen

A Brief Review on Solvent-Free Synthesis of Zeolites

In‐situ Synthesis of Gallium‐Containing SAPO‐11 Molecular Sieves and Superior Catalytic Performance of Their NiWS Supported Catalysts for Hydroisomerization of n‐Hexadecane

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