Bhat, N.S.Mal, S.S.Dutta, S.2026-02-042022Biomass Conversion and Biorefinery, 2022, 12, 12, pp. 5619-562521906815https://doi.org/10.1007/s13399-020-01052-xhttps://idr.nitk.ac.in/handle/123456789/22312Triethylammonium hydrogen sulfate (TEAHS) has been employed as an inexpensive protic ionic liquid catalyst for the preparation of various biomass-derived renewable compounds. TEAHS efficiently catalyzed the esterification of biomass-derived chemical intermediates such as levulinic acid, 2-furoic acid, stearic acid, and isosorbide. The scalable, cosolvent-free preparations were conducted in a batch-type glass pressure reactor, which provided excellent yields (> 80%) of the esters under moderate conditions. The TEAHS catalyst was conveniently separated from the reaction mixture and reused without significant loss of activity. Graphical abstract: [Figure not available: see fulltext.] © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.BiodieselCatalystsEstersSulfur compoundsBiorenewableChemical intermediatesFuel oxygenatesHydrogen sulphateIsosorbideLevulinic acidLiquid catalystProtic ionic liquidsRenewable compoundRenewable synthesisIonic liquids