Enhancing aldol condensation with coupling oxygen storage materials and VPO catalysts: Impact of oxygen, kinetics and mechanism

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-01-26 DOI:10.1016/j.apcata.2025.120136

Yuxia Li , Tingting Ge , Zehao Jing , Hui Guo , Yanxia Zheng , Yuchao Li , Xinpeng Guo , Haofei Huang , Cuncun Zuo

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引用次数: 0

Abstract

Supported vanadium-phosphorus oxide (VPO) bilayer composite catalysts were prepared using oxygen storage compounds (CeO₂, ZrO₂, TiO₂, and other forms) as catalyst supports, and applied to the aldol condensation of acetic acid and formaldehyde to produce acrylic acid. The active oxygen species on the crystal surface of rod-shaped CeO₂ (VPO/CeO₂-r) catalyst loaded with VPO effectively suppress catalyst carbon deposition and deactivation. CeO₂-r had good oxygen storage and oxygen transfer capabilities. The surface microstructure, catalytic performance, and oxygen vacancies were characterized by SEM, XRD, FI-IR, BET, TG, and EPR methods. The influence of catalytic support and reaction conditions was interrelated in an oxygen-containing atmosphere. RSM experimental design was performed and fitted to the kinetic. Under the optimal reaction conditions, using 40 % VPO/CeO₂-r, O₂ flow rate of 6 mL/min, the yield of acrylic acid was 72.6 %, and there was no carbon deposition or deactivation after the operation cycle.

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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.