Study of biodiesel production from waste cooking oil by ethyl transesterification and its purification with the use of natural adsorbents
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abstract
Biodiesel production from waste cooking oil (WCO) has become an
economic opportunity and an environmental strategy to help address
the global challenges of renewable energy production. Considering
classical industrial processes for biodiesel production, adsorption and
ion exchange technologies are the most commonly used alternatives
for crude biodiesel purification. These methods, also known as dry
cleaning methods, use an appropriate adsorbent to selectively remove
certain impurities from the liquid biodiesel phase through contact with
the surface of the adsorbent. Dry cleaning offers several advantages,
including simple integration into an existing industrial plant, shorter
purification time, lower water consumption, and lower effluent
generation. In this work, the main goals are the optimization of ethylic
biodiesel production from WCO, followed by the study of its
purification by adsorption, applying various types of previously
characterized natural adsorbents, physically and chemically activated,
which were obtained from residual biomass (olive pits), with a specific
focus on glycerol removal.
The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support through national funds
FCT/MCTES (PIDDAC) to CIMO (UIDB/00690/2020 and UIDP/00690/2020) and SusTEC (LA/P/0007/2021).
