Environmentally Friendly New Catalyst Using Waste Alkaline Solution from Aluminum Production for the Synthesis of Biodiesel in Aqueous Medium.

ABSTRACT: Red mud (RM) is composed of a waste alkaline solution (pH = 13.3) obtained from the production of alumina. It contains high concentrations of hematite (Fe₂O₃), goethite (FeOOH), gibbsite [Al(OH)₃], a boehmite (AlOOH), anatase (Tetragonal-TiO₂), rutile (Ditetragonal dipyramidal-TiO₂), hydrogarnets [Ca₃Al₂(SiO₄)_3-x(OH)_4x], quartz (SiO₂), and perovskite (CaTiO₃). It was shown to be an excellent catalytic mixture for biodiesel production. To demonstrate the value of RM, an environmentally friendly process of transesterification in aqueous medium using waste cooking oil (WCO), MeOH, and waste alkaline solution (WAS) obtained from aluminum production was proposed. T

SUBMITTER: Barbosa SL 

PROVIDER: S-EPMC10295760 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature