57731 20210121114541.0 doi 10.1039/c5cy00059a sideral 90320 ART-2015-90320 eng de la Calle, C. Biobased catalyst in biorefinery processes: Sulphonated hydrothermal carbon for glycerol esterification 2015 Access copy available to the general public Unrestricted Sulphonated hydrothermal carbon (SHTC), obtained from D-glucose by mild hydrothermal carbonisation and subsequent sulphonation with sulphuric acid, is able to catalyse the esterification of glycerol with dif- ferent carboxylic acids, namely, acetic, butyric and caprylic acids. Product selectivity can be tuned by sim- ply controlling the reaction conditions. On the one hand, SHTC provides one of the best selectivity towards 20 monoacetins described up to now without the need for an excess of glycerol. On the other hand, excellent selectivity towards triacylglycerides (TAG) can be obtained, beyond those described with other solid cata- lysts, including well-known sulphonic resins. Recovery of the catalyst showed partial deactivation of the solid. The formation of sulphonate esters on the surface, confirmed by solid state NMR, was the cause of this behaviour. Acid treatment of the used catalyst, with subsequent hydrolysis of the surface sulphonate 25 esters, allows SHTC to recover its activity. The higher selectivity towards mono- and triesters and its renewable origin makes SHTC an attractive catalyst in biorefinery processes info:eu-repo/grantAgreement/ES/MINECO/CTQ2011-28124 info:eu-repo/grantAgreement/EC/FP7/280658/EU/Doped carbon nanostructures as metal-free catalysts/FREECATS info:eu-repo/grantAgreement/ES/DGA/E11 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 5.287 2015 CHEMISTRY, PHYSICAL 28 / 144 = 0.194 2015 Q1 T1 1.804 2015 Catalysis 2015 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0002-0136-5138 Fraile, J.M. García-Bordejé, E. (orcid)0000-0002-2676-8814 Pires, E. Universidad de Zaragoza Roldán, L. 2013 765 Universidad de Zaragoza Dpto. Química Orgánica Área Química Orgánica 5, 5 (2015), 2897-2903 CATALYSIS SCIENCE & TECHNOLOGY Catalysis Science and Technology 2044-4753 385815 http://zaguan.unizar.es/record/57731/files/texto_completo.pdf Postprint 106213 http://zaguan.unizar.es/record/57731/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:57731 articulos driver 2021-01-21-11:16:41 ARTICLE