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  • http://hdl.handle.net/10402/era.24831
  • Modelling of solvent extraction of coal
  • Figueroa, Diana C
  • English
  • solvent extraction
    coal
    modelling
  • Dec 19, 2011 2:54 PM
  • Thesis
  • English
  • Adobe PDF
  • 1911916 bytes
  • Modelling of solvent extraction was studied using 1,2,3,4–tetrahydronaphtalene (tetralin) and Poplar coal (lignite). A kinetic model was developed taking into account temperature, mass transfer limitations and dominating events (physical or chemical) during coal liquefaction. It was found there is no influence of coal particle size (53 – 1000µm) and coal to solvent ratio (1:2 – 1:8) on the extraction yield. After 15 minutes or longer extraction time, two regions were identified, physical and chemical dissolution. The physical dissolution is dominant at low temperatures and chemical dissolution is dominant at high temperatures. Physical and chemical dissolution were modelled using separate terms. The term for physical dissolution employed a limiting concentration and was of the form C_(s-physical) (1-e^(-k_p t) ). The term for chemical dissolution also included a limiting concentration and was of the form (C_(s-reactive)-C_(s-physical))(1-e^(-k_r t)). The description of chemical dissolution was further refined to predict the coal soluble, coal insoluble and light fraction.
  • Figueroa Murcia, C., Rivolta Hernández, M., Gupta, R., De Klerk, A., Solvent extraction of coal at low temperature: influence of time and particle size. Prepr. Pap.-Am. Chem. Soc., Div. Fuel Chem., 56:2 (2011) 304-305.
  • Master's
  • Master of Science
  • Department of Chemical and Materials Engineering
  • Chemical Engineering
  • Spring 2012
  • de Klerk, Arno (Chemical and Materials Engineering)
    Gupta, Rajender (Chemical and Materials Engineering)
  • Trivedi, Japan (Civil and Environmental Engineering)
    de Klerk, Arno (Chemical and Materials Engineering)
    Gupta, Rajender (Chemical and Materials Engineering)