Science and Technology Production
Article
Authorship
Tonutti, Lucas G.
;
VERGARA, LOURDES
;
Linares Pérez, Noemí
;
de Oliveira Jardim, Erika
;
Dalla Costa, Bruno O.
;
Decolatti, Hernán P.
Date
2025
Publishing House and Editing Place
MDPI
Magazine
Processes,
vol. 13
MDPI
Summary
Information provided by the agent in
SIGEVA
The esterification of glycerol with acetic acid to produce acetylglycerols was investigated both in the absence of a catalyst and using several commercial FAU zeolites with varied acid site concentrations and pore structures. Specifically, ultra-stable Y zeolite (H-USY, CBV720; Si/Al: 15), ammonium Y zeolite (NH4-Y, CBV300, Si/Al: 2.6), and Na-Y zeolite (CBV100, Si/Al: 2.6) were tested to evaluate their catalytic performance in this reaction. In addition, two control catalysts were assessed und...
The esterification of glycerol with acetic acid to produce acetylglycerols was investigated both in the absence of a catalyst and using several commercial FAU zeolites with varied acid site concentrations and pore structures. Specifically, ultra-stable Y zeolite (H-USY, CBV720; Si/Al: 15), ammonium Y zeolite (NH4-Y, CBV300, Si/Al: 2.6), and Na-Y zeolite (CBV100, Si/Al: 2.6) were tested to evaluate their catalytic performance in this reaction. In addition, two control catalysts were assessed under identical conditions: a commercial acidic ionexchange resin (Amberlyst 15, A15) and a homogeneous acid catalyst (p-toluenesulfonic acid, PTSA). The catalytic performance of both the ultra-stable Y zeolite (CBV720) and Amberlyst 15 resin was comparable to the best results previously reported for solid catalysts. Furthermore, a comprehensive examination of acidity and accessibility was conducted to better understand their behavior. As expected, PTSA exhibited higher yields but also showed common drawbacks associated with homogeneous catalysts, such as corrosion and difficulties in separation. From an environmental perspective, and considering potential reuse cycles, the CBV720 zeolite delivered promising results during five consecutivetests. Its levels of conversion and selectivity were comparable to those obtained with Amberlyst 15, making it a viable alternative for future studies.
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Key Words
Y-ZEOLITESHOMOGENEOUS AND HETEROGENEOUS CATALYSTS COMPARISONACIDITY AND ACTIVE SITES ACCESSIBILITYGLYCEROL ACETYLATION