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Kinetics of heterogeneous methanolysis of sunflower oil with CaO·ZnO catalyst: Influence of different hydrodynamic conditions ; Kinetika heterogene metanolize suncokretovog ulja sa CaO·ZnO kao katalizatorom - uticaj različitih hidrodinamičkih uslova

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  • معلومة اضافية
    • بيانات النشر:
      Association of the Chemical Engineers of Serbia
    • الموضوع:
      2014
    • Collection:
      CeR - Central Repository ICTM (Institute of Chemistry, Technology and Metallurgy, University of Belgrade) / CER - Centralni Repozitorijum IHTM-a (Institut za hemiju, tehnologiju i metalurgiju, Univerzitet u Beogradu)
    • نبذة مختصرة :
      The kinetics of heterogeneous methanolysis of sunflower oil was studied at 60 °C using mechanochemically synthesized CaO·ZnO as catalyst. The influence of agitation speed, catalyst amount, and methanol-to-oil molar ratio on the rate of reaction was analyzed. The rate of the process depends on the two resistances - mass transfer of triglycerides to the catalyst surface and chemical reaction on the catalyst surface, which are defined as the values of the overall triglyceride volumetric mass transfer coefficient, kmt,TG, and the effective pseudo first-order reaction rate constant, k, respectively. These kinetic parameters actually determine the value of the apparent reaction rate constant, kapp, the time dependence of which is defined by the change of triglyceride (TG) conversion. A kinetic model is proposed and the model parameters are determined. ; Kinetika heterogene metanolize suncokretovog ulja je ispitivana na 60 °C korišćenjem CaO·ZnO katalizatora koji je sintetizovan mehanohemijskim putem. Analiziran je uticaj intenziteta mešanja, mase korišćenog katalizatora u sintezi i različitog molskog odnosa metanola i ulja na brzinu metanolize. Brzina procesa metanolize zavisi od dva otpora - otpora prenosu mase triglicerida do površine katalizatora i otpora brzini hemijske reakcije na površini katalizatora. Oba otpora određuju vrednost ukupnog zapreminskog koeficijenta prenosa mase triglicerida, kmt,TG, odnosno efektivne vrednosti konstante brzine hemijske reakcije pseudo-prvog reda, k. Ovi kinetički parametri određuju vrednost prividne konstante brzine procesa metanolize, kapp, koja se menja sa vremenom u zavisnosti od ostvareneog stepena konverzije triglicerida (TG). Predložen je odgovarajući model kojim je moguće definisati brzinu metanolize i određeni su odgovarajući parametri ovog modela.
    • ISSN:
      1451-9372
    • Relation:
      info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45001/RS//; https://cer.ihtm.bg.ac.rs/handle/123456789/1461; https://cer.ihtm.bg.ac.rs//bitstream/id/7933/1459.pdf; 2-s2.0-84919783679; 000343922200014
    • الرقم المعرف:
      10.2298/CICEQ130514025L
    • Rights:
      openAccess ; https://creativecommons.org/licenses/by-nc-nd/4.0/ ; BY-NC-ND
    • الرقم المعرف:
      edsbas.11E508BF