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Hydroisomerization Principles of Acenaphthene to Alkyladamantanes over Modified USY-Supported Pt Catalysts
Energy & Fuels ( IF 5.2 ) Pub Date : 2024-03-27 , DOI: 10.1021/acs.energyfuels.4c00041
Jiasong Zhao 1 , Ximo Wang 1 , Hongyu Niu 1 , Jiaxin Liu 1 , Changhai Liang 1 , Chuang Li 1
Energy & Fuels ( IF 5.2 ) Pub Date : 2024-03-27 , DOI: 10.1021/acs.energyfuels.4c00041
Jiasong Zhao 1 , Ximo Wang 1 , Hongyu Niu 1 , Jiaxin Liu 1 , Changhai Liang 1 , Chuang Li 1
Affiliation
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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.
中文翻译：
改性 USY 负载 Pt 催化剂上苊加氢异构化为烷基金刚烷的原理
烷基金刚烷 (AA) 因其高密度、高热值和良好的低温性能而成为航空推进用高能量密度燃料的理想候选者。然而，AA通过相关多环芳烃（PAH）加氢异构化的反应过程仍不清楚。本研究重点研究使用 Pt/USY 催化剂的具有代表性的多环芳烃苊的加氢异构化过程。为了提高 C12 AA 的最高收率，对 USY 沸石进行脱金属处理，以增强扩散并调节酸度。此外，还研究了全氢化苊（PHA）的异构化过程，以检验完全氢化物质的不同构象的影响。据观察，平铺的反-反-反构象更容易异构化为 AA，可能是由多个活性位点催化的。基于蒽、菲和芴的反应网络，形成全氢苯酚型三环结构的能力是PAHs加氢异构化为AA的必要条件。
更新日期：2024-03-27
中文翻译：
改性 USY 负载 Pt 催化剂上苊加氢异构化为烷基金刚烷的原理
烷基金刚烷 (AA) 因其高密度、高热值和良好的低温性能而成为航空推进用高能量密度燃料的理想候选者。然而，AA通过相关多环芳烃（PAH）加氢异构化的反应过程仍不清楚。本研究重点研究使用 Pt/USY 催化剂的具有代表性的多环芳烃苊的加氢异构化过程。为了提高 C12 AA 的最高收率，对 USY 沸石进行脱金属处理，以增强扩散并调节酸度。此外，还研究了全氢化苊（PHA）的异构化过程，以检验完全氢化物质的不同构象的影响。据观察，平铺的反-反-反构象更容易异构化为 AA，可能是由多个活性位点催化的。基于蒽、菲和芴的反应网络，形成全氢苯酚型三环结构的能力是PAHs加氢异构化为AA的必要条件。
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