FePO4在甘油脱水制丙烯醛中的催化性能及失活机理

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-04-30 DOI:10.1016/j.apcata.2025.120314

Feng Chen , Shuangming Li , Yuanyuan Zhang , Yiwen Wang , Sansan Yu

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引用次数: 0

摘要

采用磷酸铁（FePO4）作为高效固体酸催化剂，对甘油选择性气相脱水制丙烯醛进行了研究。系统研究了煅烧温度（400 ~ 700℃）对FePO4晶相演化及催化性能的影响。通过XRD、SEM、BET、XPS、NH3-TPD和Py-FTIR分析了晶体结构、表面性质和酸位分布。结果表明，600℃煅烧的FePO4对丙烯醛的选择性最高（93.2 %）。随着煅烧温度的升高，FePO4的晶型结构由钇铝石转变为红橄榄石，但这种结构变化对催化性能的影响很小。结果表明，在催化反应过程中，FePO4逐渐转化为Fe2P2O7是导致催化剂失活的主要因素。有趣的是，失活的催化剂可以通过原位氧化热处理有效地再生和恢复其性能。

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Catalytic performance and deactivation mechanism of FePO4 in the dehydration of glycerol to acrolein

Iron phosphate (FePO₄) was employed as a highly efficient solid acid catalyst for the selective gas-phase dehydration of glycerol to acrolein. The influence of calcination temperature (400–700 ℃) on the crystalline phase evolution and catalytic performance of FePO₄ was systematically investigated. Crystal structure, surface properties, and acid site distribution were analyzed via XRD, SEM, BET, XPS, NH₃-TPD, and Py-FTIR. Results demonstrated that FePO₄ calcined at 600 ℃ showed the highest selectivity (93.2 %) to acrolein. Increasing the calcination temperature induces a phase transition in FePO₄ from tridymite to rodolicoite structure, though the structural change has a minimal impact on the catalytic performance. Furthermore, it is demonstrated that the progressive transformation of FePO₄ into Fe₂P₂O₇ during catalytic reaction represents the primary factor contributing to catalyst deactivation. Interestingly, the deactivated catalyst can be effectively regenerated and its performance restored via in-situ oxidation heat treatment.

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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.