Regulate the mesopores and acidic structure of Pt/USY zeolite catalyst for improved performance in the hydroisomerization of phenanthrene to alkyl-adamantane

Li, Ké; Cui, Tianyun; Zhao, Jie; Liang, Changhai; Li, Chuang

doi:10.1016/j.ces.2023.118957

Cited by 9 publications

(10 citation statements)

References 51 publications

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“…Compared to the original USY, USY-A exhibited a substantial decrease in its EFAl, as a result of eliminating particular non-crystalline EFAl impurities during the NaOH solution desilication process. Additionally, there was a slight reduction in FAl, potentially due to the removal of some FAl resulting from the extensive desilicification, causing framework collapse . The decrease in FAl and increase in EFAl in USY-S were attributed to the fact that steam did not remove the FAl but resulted in EFAl remaining in the pore channel .…”

Section: Resultsmentioning

confidence: 99%

“…Due to the large size of PAHs molecules, the reaction process did not reach all of the acidic sites. Therefore, DTBPy was used as a probe molecule to investigate the accessibility of zeolites to macromolecules by the acidity of their outer surfaces and pores . The results are shown in Figure c.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, DTBPy was used as a probe molecule to investigate the accessibility of zeolites to macromolecules by the acidity of their outer surfaces and pores. 24 The results are shown in Figure 4c. The bands probed by DTBPy at 1616 and 3367 cm −1 have been attributed to the N−H + vibration and the C−C stretching of DTBPyH + , respectively, representative of the accessible amount of BAS.…”

Section: Characterization Of Supports and Supportedmentioning

confidence: 95%

“…Additionally, there was a slight reduction in FAl, potentially due to the removal of some FAl resulting from the extensive desilicification, causing framework collapse. 24 The decrease in FAl and increase in EFAl in USY-S were attributed to the fact that steam did not remove the FAl but resulted in EFAl remaining in the pore channel. 41 While USY-AS had a decrease in FAl and EFAl because of the combined effect of the two treatments, the overall ratio of EFAl/FAl still increased.…”

Section: Characterization Of Supports and Supportedmentioning

confidence: 98%

“…Subsequently, the obtained USY underwent with 2 mol/L NH 4 Cl solution at 80 °C for three times, followed by roasting at 550 °C. 24 The sample obtained was labeled as USY-A. The steaming treatment method involved weighing a specific amount of USY into a tube furnace and heating it at 700 °C.…”

Section: Preparation Of Supports and Supported Platinummentioning

confidence: 99%

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Hydroisomerization Principles of Acenaphthene to Alkyladamantanes over Modified USY-Supported Pt Catalysts

Zhao,

Wang,

Niu

et al. 2024

Energy Fuels

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Alkyladamantanes (AAs) are the ideal candidates for high energy density fuels for aviation propulsion due to their high density, high calorific values, and good low-temperature performance. However, the reaction process of AAs through the hydroisomerization of related polycyclic aromatic hydrocarbons (PAHs) remained unclear. This study focuses on investigating the hydroisomerization process of acenaphthene as a representative PAH using Pt/USY catalysts. To enhance the highest yield of the C12 AAs, USY zeolites were demetallized to enhance the diffusion and adjust the acidity. Additionally, the isomerization process of perhydroacenaphthene (PHA) was studied to examine the impact of different conformations of fully hydrogenated species. It was observed that the tiled trans–trans–trans conformation was more easily isomerized to AAs, likely catalyzed by multiple active sites. Based on the reaction network of anthracene, phenanthrene, and fluorene, the ability to form the perhydrophenalene type tricyclic structure was a necessary condition for the hydroisomerization of PAHs to AAs.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Supports and Supportedmentioning

confidence: 95%

Section: Characterization Of Supports and Supportedmentioning

confidence: 98%

Section: Preparation Of Supports and Supported Platinummentioning

confidence: 99%

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