000167932 001__ 167932 000167932 005__ 20260122172506.0 000167932 0247_ $$2doi$$a10.1016/j.expthermflusci.2020.110076 000167932 0248_ $$2sideral$$a116495 000167932 037__ $$aART-2020-116495 000167932 041__ $$aeng 000167932 100__ $$0(orcid)0000-0003-1337-0310$$aMuelas, A.$$uUniversidad de Zaragoza 000167932 245__ $$aCombustion of crude glycerol and its blends with acetals 000167932 260__ $$c2020 000167932 5060_ $$aAccess copy available to the general public$$fUnrestricted 000167932 5203_ $$aIn spite of its relevance, the prospective energetic valorization of crude glycerol (CG), a major by-product of biodiesel production, remains nowadays unfulfilled in the industry because of the significant challenges posed by its combustion properties. Besides some basic post-treatments such as desalting (to obtain desalted crude glycerol, DG), its blending with other industrial by-products could improve crude glycerol properties, while maintaining the renewable nature of the fuel. A secondary product obtained from the FAGE process, consisting in a mixture of acetals named GF*, has been proposed in this work as a suitable fuel for this purpose. The combustion characteristics of these by-products have been tested along with different CG-GF* and DG-GF* blends by employing single droplet combustion experiments and semi-industrial furnace tests. Single droplet results point to widely different behaviors between GF* and the glycerols, the latter displaying much lower burning rates and violent microexplosions ascribed to salt content as well as to the broad differences in their constituent''s boiling points. Relevant differences were noted between DG and CG modes of microexplosion, presumably due to the lower salt content of the former. Both CG-GF* and DG-GF* mixtures presented similar behaviors to CG, although with a noticeably faster conversion. The furnace tests revealed that GF* addition widened the range of stable conditions in the burner, significantly improving flame stability and reducing CO emissions. NOx emissions slightly increased, although they could be reduced through burner aerodynamics optimization, facilitated by the improvement in flame stability. The reported results support the potential use of GF* as auxiliary fuel for enhancing the combustion behaviors of crude glycerol. © 2020 000167932 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 000167932 590__ $$a3.232$$b2020 000167932 591__ $$aPHYSICS, FLUIDS & PLASMAS$$b7 / 34 = 0.206$$c2020$$dQ1$$eT1 000167932 591__ $$aTHERMODYNAMICS$$b20 / 60 = 0.333$$c2020$$dQ2$$eT2 000167932 591__ $$aENGINEERING, MECHANICAL$$b43 / 133 = 0.323$$c2020$$dQ2$$eT1 000167932 592__ $$a1.306$$b2020 000167932 593__ $$aAerospace Engineering$$c2020$$dQ1 000167932 593__ $$aChemical Engineering (miscellaneous)$$c2020$$dQ1 000167932 593__ $$aNuclear Energy and Engineering$$c2020$$dQ1 000167932 593__ $$aMechanical Engineering$$c2020$$dQ1 000167932 593__ $$aFluid Flow and Transfer Processes$$c2020$$dQ1 000167932 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000167932 700__ $$0(orcid)0000-0001-9446-8461$$aRemacha, P.$$uUniversidad de Zaragoza 000167932 700__ $$aPina, A. 000167932 700__ $$0(orcid)0000-0002-0063-1318$$aBarroso, J.$$uUniversidad de Zaragoza 000167932 700__ $$0(orcid)0000-0001-9135-1196$$aSobrino, A.$$uUniversidad de Zaragoza 000167932 700__ $$aAranda, D. 000167932 700__ $$aBayarri, N. 000167932 700__ $$aEstévez, C. 000167932 700__ $$0(orcid)0000-0003-2863-4681$$aBallester, J.$$uUniversidad de Zaragoza 000167932 7102_ $$15001$$2600$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Mecánica de Fluidos 000167932 773__ $$g114 (2020), 110076 [11 pp.]$$pExp. therm. fluid sci.$$tExperimental Thermal and Fluid Science$$x0894-1777 000167932 8564_ $$s2249455$$uhttps://zaguan.unizar.es/record/167932/files/texto_completo.pdf$$yPostprint 000167932 8564_ $$s2037573$$uhttps://zaguan.unizar.es/record/167932/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000167932 909CO $$ooai:zaguan.unizar.es:167932$$particulos$$pdriver 000167932 951__ $$a2026-01-22-16:07:10 000167932 980__ $$aARTICLE