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Open AccessFeature PaperArticle

Sulfonated Hydrothermal Carbons from Cellulose and Glucose as Catalysts for Glycerol Ketalization

1
Dpto. Química Orgánica, Facultad de Ciencias, Universidad de Zaragoza, E-50009 Zaragoza, Spain
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Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Facultad de Ciencias, C.S.I.C. - Universidad de Zaragoza, E-50009 Zaragoza, Spain
3
Instituto de Carboquímica (ICB-CSIC), Miguel Luesma Castán 4, E-50018 Zaragoza, Spain
*
Authors to whom correspondence should be addressed.
Catalysts 2019, 9(10), 804; https://doi.org/10.3390/catal9100804
Received: 1 July 2019 / Revised: 19 September 2019 / Accepted: 23 September 2019 / Published: 25 September 2019
Solketal is one of the most used glycerol-derived solvents. Its production via heterogeneous catalysis is crucial for avoiding important product losses typically found in the aqueous work-up in homogeneous catalysis. In this work, we present a study of the catalytic synthesis of solketal using sulfonated hydrothermal carbons (SHTC). They were prepared from glucose and cellulose resulting in different textural properties depending on the hydrothermal treatment conditions. The sulfonated hydrothermal carbons were also coated on a graphite microfiber felt ([email protected]). Thus, up to nine different solids were tested, and their activity was compared with commercial acidic resins. The solids presented very different catalytic activity, which did not correlate with their physical-chemical properties indicating that other aspects likely influence the transport of reactants and products to the catalytic surface. Additionally, the SHTC prepared from cellulose showed better reusability in batch reaction tests. This work also presents the first results for the production of solketal in a flow reactor, which opens the way to the use of [email protected] for this kind of reactions. View Full-Text
Keywords: sulfonated hydrothermal carbon; solketal; sulfonic solids; ketalization; continuous flow sulfonated hydrothermal carbon; solketal; sulfonic solids; ketalization; continuous flow
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MDPI and ACS Style

Fernández, P.; Fraile, J.M.; García-Bordejé, E.; Pires, E. Sulfonated Hydrothermal Carbons from Cellulose and Glucose as Catalysts for Glycerol Ketalization. Catalysts 2019, 9, 804.

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