高锡含量Mg-Sn-β水热合成高浓度乙酰丙酸乙酯转化为γ-戊内酯

IF 9 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy Pub Date : 2025-06-04 DOI:10.1016/j.renene.2025.123663

Yingfu Tian , Tianliang Lu , Hongjin Qu , Xiaomei Yang , Lipeng Zhou

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引用次数: 0

摘要

在中等温度下，通过催化转移加氢策略将高浓度乙酰丙酸乙酯（EL）高效转化为γ-戊内酯（GVL）是非常理想的。本文采用水热合成的高锡含量的Sn-β沸石作为催化剂来实现这一目标。以MgCl2为促进剂，在12天内成功合成了高锡含量（nSi/nSn = 60）的完全结晶的Sn-β沸石。采用XRD、SEM、UV-vis光谱、FT-IR光谱和XPS对合成的沸石进行了表征。Mg-Sn-β-100-7d的L酸密度为56 μmol g−1，Mg-Sn-β-60-12d的L酸密度为90 μmol g−1。以高浓度EL （1.2 mol L−1）为反应物，在130℃下反应8 h， Mg-Sn-β-60-12d的GVL产率达到92%，性能优于相同nSi/nSn条件下的Sn-β。讨论了Mg-Sn-β的反应机理。此外，Mg-Sn-β-60-12d在5次运行中表现出良好的稳定性和可重复使用性。

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Conversion of ethyl levulinate in high concentration to γ-valerolactone over hydrothermally synthesized Mg-Sn-β with high Sn content

Efficient conversion of ethyl levulinate (EL) in high concentration to γ-valerolactone (GVL) at moderate temperature via catalytic transfer hydrogenation strategy is highly desirable. In this work, hydrothermally synthesized Sn-β zeolite with high Sn content was employed as a catalyst to realize this aim. Fully crystallized Sn-β zeolite with high Sn content (n_Si/n_Sn = 60) was successfully synthesized within 12 days using MgCl₂ as a promoter. The synthesized zeolites were characterized by XRD, SEM, UV–vis spectroscopy, FT-IR spectroscopy and XPS. The L acid density of Mg-Sn-β-60-12d increased to 90 μmol g⁻¹ compared to Mg-Sn-β-100-7d (56 μmol g⁻¹). 92 % yield of GVL was achieved on Mg-Sn-β-60-12d using high concentration of EL (1.2 mol L⁻¹) as reactant at 130 °C for 8 h. The performance of Mg-Sn-β is better than that of Sn-β with same n_Si/n_Sn. The reaction mechanism over Mg-Sn-β was discussed. In addition, Mg-Sn-β-60-12d showed excellent stability and reusability during five runs.

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来源期刊

Renewable Energy 工程技术-能源与燃料

CiteScore

18.40

自引率

9.20%

发文量

1955

审稿时长

6.6 months

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