Reusability of Mg/Al catalysts for the aldol condensation of furfural and acetone in a continuous flow reactor

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-02-06 DOI:10.1016/j.apcata.2025.120151

Saleem Munir, Daniel Montané, Magdalena Constantí, Francesc Medina

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Abstract

Hydrotalcite catalysts with a Mg: Al ratio of 3:1 were assessed for the aldol condensation of furfural with acetone on a continuous packed bed reactor. The as-prepared (FHT), calcined (CHT), and rehydrated (RHT) hydrotalcites were characterized and their activity was tested at 100 °C and 12 bar(a) with an acetone:furfural ratio of 10:1 at a furfural WHSV of 5.77 h⁻¹. FHT showed low conversion and deactivated fast. CHT and RHT exhibited complete conversion during 2 and 4 h, respectively, and deactivated to a 20 % conversion after 8–11 h. The main products were (E)-4-(furan-2-yl)but-3-en-2-on (C8) and (1E,4E)-1,5-di(furan-2-yl)penta-1,4-dien-3-one (C13). Small amounts of higher molar mass products formed by ketonization were observed, and they were linked to the deposition of insoluble oligomers. Reuse of the spent catalysts by recalcination to remove the organic deposits was evaluated for a total of four reaction tests. A gradual loss of performance was seen after each reactivation 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.