Improving catalytic activity and stability of ZrO2 and CeO2 in the vapor-phase intramolecular aldol condensation of 2,5-hexanedione to 3-methyl-2-cyclopentenone

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-02-07 DOI:10.1016/j.apcata.2025.120163

Takuto Adachi, Enggah Kurniawan, Takashi Kojima, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato

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引用次数: 0

Abstract

Improving catalytic stability by reducing the coke formation is still important in ensuring the longevity of the catalyst, especially in acid-base sites catalyzed reactions. In this work, we successfully improved the catalytic activity and stability of ZrO₂ and CeO₂ catalysts in the aldol condensation of 2,5-hexanedione (HDO) to 3-methyl-2-cyclopentenone (MCP) by the Ag modification and operation in H₂ flow. ZrO₂ poorly catalyzed aldol condensation of HDO and was severely deactivated regardless of the reaction conditions. Similarly, the CeO₂ was also deactivated during aldol condensation of HDO even though it has a milder deactivation rate than ZrO₂ catalyst. The modification of ZrO₂ and CeO₂ with Ag and the operation in H₂ flow reduced the catalyst deactivation by reducing the coke accumulation on the catalyst, while still maintaining high selectivity to MCP. Consequently, the modified ZrO₂ and CeO₂ catalyst could maintain their high activity under prolonged time on stream.

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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.