Seite - 211 - in Advanced Chemical Kinetics

Itwaspossible toobservepurely fromtheultrasonicvelocitymeasurement that the faster the mechanical stirringacts, the faster is the transesterificationkinetics.Moreover, it ispossible to identify theelapsedtimewhenthereactionreaches itsmaximumpossibleconversion,dictated bytheamountofcatalyst.Forall cases,ultrasonicmonitoringhasdisclosedacausal relationto thegoldstandardanalyticalmethods. Authordetails RaphaelaM.Baêsso,PâmellaA.Oliveira,GabrielC.Moraes,AndréV.Alvarengaand RodrigoP.B.Costa-Félix* *Addressall correspondence to: rpfelix@inmetro.gov.br LaboratoryofUltrasound–National InstituteofMetrology,QualityandTechnology (Inmetro),DuquedeCaxias,RJ,Brazil References [1] GreenwoodMS, Bamberger JA.Measurement of viscosity and shear wave velocity or slurry for on-line process control. Ultrasonics. 2002;39(9):623-630. DOI: https://doi.org/ 10.1016/S0041-624X(02)00372-4 [2] SagginR,Coupland JN.Oil viscositymeasurement byultrasonic reflectance. Journal of the American Oil Chemists’ Society. 2001;78(5):509-511. DOI: https://doi.org/10.1007/ s11746-001-0294-z [3] SagginR,Coupland JN.Concentrationmeasurement byacoustic reflectance. Journal of FoodScience. 2001;66(5):681-685.DOI:https://doi.org/10.1111/j.1365-621.2001.tb04621.x [4] Richard R, Li Y, Dubreuil B, Thiebaud-Roux S, Prat L. On-line monitoring of the transesterification reaction between triglycerides and ethanol using near infrared spec- troscopycombinedwithgas chromatography.BioresourceTechnology. 2011;102(2):6702- 6709.DOI:https://doi.org/10.1016/j.biortech.2011.03.111 [5] DubéMA,ZhengS,McLeanDD,KatesM.A comparisonof attenuated total reflectance- FTIRspectroscopyandGPCformonitoringbiodieselproduction. Journalof theAmerican OilChemists’Society.2004;81(6):599-603.DOI:https://doi.org/10.1007/s11746-006-0948-x [6] FoglerHS.ElementosdeEngenhariadasReaçõesQuímicas.4thed.SãoPaulo,SP:Editora LTC;2009 [7] KusdianaD,SakaS.Kineticsoftransesterificationinrapeseedoil tobiodieselfuelastreated in supercritical methanol. Fuel. 2001;80:693-698. DOI: https://doi.org/10.1016/S0016-2361 (00)00140-X Ultrasound as a Metrological Tool for Monitoring Transesterification Kinetics http://dx.doi.org/10.5772/intechopen.70501 211