Dehydrogenation of methyl glycolate to methyl glyoxylate over a Cu/SiO2 catalyst

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-03-12 DOI:10.1016/j.apcata.2025.120219

Zixuan Gong , Hao Wang , Tian Lan , Zhongchen Ma , Shaolin Wang , Yong Lu

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引用次数: 0

Abstract

Dehydrogenation of methyl glycolate (MG) is an attractive method for synthesizing methyl glyoxylate (MGO, an important high-value chemical and pharmaceutical intermediate), which is calling for a qualified catalyst. Cu/SiO₂-AE catalysts were prepared via the ammonia evaporation method for the title reaction, showing the catalytic performance strongly dependent on their preparation/activation parameters as well as the reaction conditions. The preferable 15Cu/SiO₂-80AE (15 wt% Cu-loading; AE-treatment at 80 °C; calcined at 500 °C) after H₂-reduction at 300 °C achieved a high MG conversion of 38.5 % with MGO selectivity of 79.0 % at 400 °C. The Cu/SiO₂-AE catalyst demonstrates promising catalytic performance, achieving 38.5 % MG conversion with 79.0 % MGO selectivity at 400 °C. The Cu⁺/Cu⁰ ratio plays a crucial role in catalytic activity, as revealed by XPS, FTIR, and MG-TPSR. Deactivation mechanisms were studied, and catalyst regeneration was explored, offering insights for industrial application in green MGO synthesis.

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在Cu/SiO2催化剂上乙醇酸甲酯脱氢制乙醛酸甲酯

乙醇酸甲酯脱氢是一种有吸引力的合成乙醛酸甲酯（MGO）的方法，它是一种重要的高价值化工和医药中间体，需要合适的催化剂。采用氨蒸发法制备Cu/SiO2-AE催化剂进行标题反应，其催化性能与制备/活化参数及反应条件密切相关。优选15Cu/SiO2-80AE(15 wt% cu loading；ae处理在80 °C；在300 °C下h2还原后，在500 °C下煅烧，在400°C下MG转化率为38.5 %，MGO选择性为79. %。Cu/ sio2 -AE催化剂表现出良好的催化性能，在400°C下，MG转化率为38.5% %，MGO选择性为79. %。XPS、FTIR和MG-TPSR显示，Cu + /Cu⁰比值在催化活性中起着至关重要的作用。研究了失活机理，并对催化剂再生进行了探索，为绿色MGO合成的工业应用提供了见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.