Fabricating self-assembled SAPO-5 with tailored mesoporosity and acidity using a single template

Chen, Zhou; Zhu, Shaohong; Peng-yun, LI; Li, Xinyuan; Xu, Yingrui; Dong, Yuanyuan; Song, Wenjing; Yi, Xiaodong; Fang, Weiping

doi:10.1039/c7ce01132f

Cited by 14 publications

(13 citation statements)

References 45 publications

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“…The pyridine‐IR spectra of the samples are shown in Figure . Typical IR bands at ∼1449 cm −1 and ∼1546 cm −1 in the spectra correspond to the characteristic bands of pyridine molecules chemisorbed on Lewis (L) and Brønsted (B) acid sites, respectively . The IR bands at 1489 cm −1 and 1491 cm −1 are ascribed to pyridine adsorption on both B and L acids sites .…”

Section: Resultsmentioning

confidence: 99%

“…The results indicate that the introduction of ILs decreased the total and strong acid amounts of E‐SAPO‐5. Strong acid sites are generally caused by Si incorporation in the tetrahedral positions of the AlPO 4 framework . As demonstrated by the 29 Si NMR, the E‐SAPO‐5 has a significantly reduced amount of isolated Si‐(OAl) 4 as compared to the SAPO‐5.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, because of the substitution of Si atoms into the corresponding AlPO 4 ‐5 framework, SAPO‐5 possesses ion‐exchange capability and superior acid‐catalysis activity . SAPO‐5 has been widely used in the fields of catalysis and separation, such as the alkylation of benzene with benzyl alcohol, hydroisomerization, isopropylation of biphenyl, methanol‐to‐olefin (MTO) reaction, hydrocracking, catalytic cracking, hydrorefining, oxidation of cyclohexane, photocatalytic reduction of CO 2 , methanol‐to‐dimethyl‐ether (MTD) reaction, and separation for hydrocarbons . These catalytic performances and separation characteristics are heavily influenced by the structure and properties of SAPO‐5, such as its porosity, acidity and morphology .…”

Section: Introductionmentioning

confidence: 99%

“…These catalytic performances and separation characteristics are heavily influenced by the structure and properties of SAPO‐5, such as its porosity, acidity and morphology . Moreover, the synthesis methods and conditions have a substantial impact on the porosity, acidity and morphology of SAPO‐5 . In general, SAPO‐5 molecular sieves have been synthesized by hydrothermal synthesis method under high autogeneous pressure .…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the synthesis methods and conditions have a substantial impact on the porosity, acidity and morphology of SAPO‐5 . In general, SAPO‐5 molecular sieves have been synthesized by hydrothermal synthesis method under high autogeneous pressure . Hierarchically structured SAPO‐5 molecular sieves have been ionothermally synthesized by microwave heating in a eutectic solvent under ambient pressure …”

Section: Introductionmentioning

confidence: 99%

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Effect of Ionothermal Synthesis on the Acidity and Catalytic Performance of a SAPO‐5 Molecular Sieve

et al. 2019

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SAPO-5 molecular sieves (E-SAPO-5) were synthesized ionothermally in 1-ethyl-2,3-dimethylimidazolium bromides ([EMMIM] Br) ionic liquid (IL). The samples were characterized by X-ray diffraction (XRD), nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), N 2 isothermal adsorption-desorptionand, temperature-programmed desorption of ammonia (NH 3 -TPD) and fourier transform infrared (FT-IR) spectroscopy. Moreover, the catalytic performances of the samples in the methanol conversion reaction were investigated. Relative to the hydrothermal method, ionothermal synthesis favored the formation of large silica islands mainly by the SM3 substitution mechanism and decreased the B acid sites and the strong acid and total acid amounts of E-SAPO-5, which significantly influenced the distribution of the products in the methanol conversion reaction. Methanol underwent the methanol-to-dimethyl-ether (MTD) reaction and methanol-to-olefin (MTO) reaction over the E-SAPO-5 and hydrothermally synthesized SAPO-5, respectively. E-SAPO-5 exhibited high MTD activity at the high temperature of 450°C with methanol conversion of 100% and dimethyl ether (DME) selectivity of 86.6%.[a] J.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Ionothermal Synthesis on the Acidity and Catalytic Performance of a SAPO‐5 Molecular Sieve

et al. 2019

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Advances in Catalytic Applications of Zeolite‐Supported Metal Catalysts

2021

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Hydroisomerization with a Hierarchical SAPO‐11 Supported Ni Catalyst: Effect of DTAB Content[]**

et al. 2021

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In order to explore the effect of the amount of mesoporous template on the physicochemical properties and hydroisomerization of the hierarchical SAPO‐11, a series of hierarchical SAPO‐11 were synthesized by adding different amounts of dodecyl trimethyl ammonium bromide(DTAB) as mesopore structure directing agent. The synthesized hierarchical SAPO‐11 were characterized by XRD, N2 adsorption‐desorption, SEM, TEM, NH3‐TPD and Py‐FTIR. The results showed that the addition amount of DTAB had a significant effect on the crystallinity, the specific surface area, the pore volume and acid sites of the synthesized hierarchical SAPO‐11. The hydroisomerization of the hierarchical SAPO‐11 was evaluated with 1‐octene as a probe after loading propriate amount of Ni. The results showed that with the increase in the DTAB content, the selectivity of mono‐branched isomers increases rapidly at first and then tends to be flat. The selectivity of the di‐branched isomers increased first and then decreased, this shows that choosing an appropriate amount of DTAB is very important to improve the hydroisomerization selectivity of the hierarchical Ni/SAPO‐11 catalyst.

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Fabricating self-assembled SAPO-5 with tailored mesoporosity and acidity using a single template

Abstract: SAPO-5 zeolite with a bimodal pore system was hydrothermally synthesized using di-n-butylamine as single template. The structural and catalytic properties of the hierarchical SAPO-5 were extensively characterized and compared to those of conventional SAPO-5 using triethylamine as template.

Cited by 14 publications

References 45 publications

Effect of Ionothermal Synthesis on the Acidity and Catalytic Performance of a SAPO‐5 Molecular Sieve

Effect of Ionothermal Synthesis on the Acidity and Catalytic Performance of a SAPO‐5 Molecular Sieve

Advances in Catalytic Applications of Zeolite‐Supported Metal Catalysts

Hydroisomerization with a Hierarchical SAPO‐11 Supported Ni Catalyst: Effect of DTAB Content[]**

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