• Login
    View Item 
    •   NM-AIST Home
    • Materials, Energy, Water and Environmental Sciences
    • Research Articles [MEWES]
    • View Item
    •   NM-AIST Home
    • Materials, Energy, Water and Environmental Sciences
    • Research Articles [MEWES]
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Rheological and Physicochemical Analysis of Nonedible Oils Used for Biodiesel Production

    Thumbnail
    View/Open
    Full text (3.185Mb)
    Date
    2022-10-13
    Author
    Zakaria, Francisca
    Lujaji, Frank
    Kivevele, Thomas
    Metadata
    Show full item record
    Abstract
    Rheological and physicochemical characteristics of edible oils used for biodiesel production are well established; nonetheless, the rheological and physicochemical characteristics of nonedible oils are yet to be established. The present study therefore focuses on rheological and physicochemical characterization of nonedible vegetable oils that can be used as biodiesel feedstock. The selected vegetable oils studied include cashew nut shell liquid (CNSL), castor oil (CO), Croton megalocarpus oil (CMO), Podocarpus usambarensis oil (PUO), and Thevetia peruviana oil (TPO). Physicochemical parameters analyzed were free fatty acids, acid value, saponification value, peroxide value, iodine value, specific gravity, and moisture content using methods by the Association of Official Analytical Chemists (AOAC). Rheological properties were analyzed using a VT-550 Thermo Haake Viscotester operated by the Rheowin 3 Job Manager software. The preset parameters in the Viscotester were shear rate and temperature. The shear rate increased uniformly from 5 to 100 s–1 at the temperature range of 30–60 °C. The experimental data were fitted into rheological models of Newton, Bingham, Ostwald–de Waele (power-law), and Herschel–Bulkley using Rheowin 3 Data Manager. The oil yield was 29–65%, highlighting the feedstock’s potential for commercial biodiesel production. At a constant temperature, all oil samples exhibited a Newtonian flow behavior. In contrast to edible oils, nonedible oils exhibited high shear stress, emphasizing the reconstruction of new appropriate designs of production systems. The rheological models appropriate to represent the flow behavior of the samples were the Newton and Ostwald–de Waele models, with a fit of R2 = 0.990–1.000.
    URI
    https://doi.org/10.1021/acsomega.2c02960
    https://dspace.nm-aist.ac.tz/handle/20.500.12479/1831
    Collections
    • Research Articles [MEWES]

    Nelson Mandela-AIST copyright © 2021  DuraSpace
    Theme by 
    Atmire NV
     

     

    Browse

    All PublicationsCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    Nelson Mandela-AIST copyright © 2021  DuraSpace
    Theme by 
    Atmire NV