丙基磺酸功能化介孔二氧化硅上酸催化高酸值Macauba浆和巴西坚果油的酯化反应

IF 4.3 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ACS Omega Pub Date : 2025-03-24 DOI:10.1021/acsomega.5c0109910.1021/acsomega.5c01099

José Sebastião C. Vieira, Anderson F. S. Moreira, Ricardo D. Anjos, Ana Lúcia de Lima, Elizabeth R. Lachter, Germildo G. Muchave and Claudio J. A. Mota*,

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引用次数: 0

摘要

在非均相酸催化条件下，用甲醇酯化了澳门果肉（Acrocomia aculeata）和巴西坚果（Bertholletia excelsa）的低价值植物油。原料植物油的表征显示出较高的游离脂肪酸和水分含量。以丙基磺酸为接枝剂，在MCM-41 （Pr-HSO3/MCM-41）和SBA-15 （Pr-HSO3/SBA-15）介孔二氧化硅材料上共缩合制备了非均相酸催化剂。该催化剂用于澳门（Acrocomia aculeata）油和巴西坚果（Bertholletia excelsa）油的酯化反应。甲酯的收率可达96%。催化剂很容易回收和再利用。由于活性相的浸出更严重，接枝在MCM-41二氧化硅上的催化剂比接枝在SBA-15上的催化剂失活更快。对澳门和巴西坚果油进行酯化反应的结果表明，该催化剂可作为高酸性原料制备生物柴油的重要原料。

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Acid-Catalyzed Esterification of Macauba Pulp (Acrocomia aculeata) and Brazil Nut (Bertholletia excelsa) Oils of High Acid Values over Mesoporous Silica Functionalized with Propyl Sulfonic Acid

Low-value vegetable oils of Macauba pulp (Acrocomia aculeata) and Brazil nut (Bertholletia excelsa) were esterified with methanol under heterogeneous acid catalysis conditions. The characterization of the raw vegetable oils revealed high free fatty acid and moisture content. The heterogeneous acid catalysts were prepared by co-condensation upon the grafting of propylsulfonic acid on MCM-41 (Pr-HSO₃/MCM-41) and SBA-15 (Pr-HSO₃/SBA-15) mesoporous silica materials. The catalysts were used in the esterification of the Macauba (Acrocomia aculeata) and Brazil nut (Bertholletia excelsa) oils. The yield of methyl esters reached up to 96%. The catalysts were easily recovered and tested for reuse. The catalyst grafted on the MCM-41 silica showed faster deactivation than the catalyst grafted on SBA-15, due to more severe leaching of the active phase. The results obtained during the esterification of the Macauba and Brazil nut oils indicated that the catalysts could be promising materials for producing biodiesel from raw materials containing high-acidity values.

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来源期刊

ACS Omega Chemical Engineering-General Chemical Engineering

CiteScore

6.60

自引率

4.90%

发文量

3945

审稿时长

2.4 months

期刊介绍： ACS Omega is an open-access global publication for scientific articles that describe new findings in chemistry and interfacing areas of science, without any perceived evaluation of immediate impact.