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Characterization and application of dolomite as catalytic precursor for canola and sunflower oils for biodiesel production

2015; Elsevier BV; Volume: 269; Linguagem: Inglês

10.1016/j.cej.2015.01.097

1873-3212

Leandro Marques Correia, Natália de Sousa Campelo, Denise S. Novaes, Célio L. Cavalcante, Juan Antonio Cecilia, Enrique Rodríguez‐Castellón, Rodrigo Silveira Vieira,

Lubricants and Their Additives

The catalytic activity of precursor dolomite as a heterogeneous catalyst in biodiesel production has been investigated. The dolomitic material is a double calcium and magnesium carbonate, which when calcinated decomposes into CaO and MgO that are highly basic. The materials were characterized by XRD, TG–DTG, CO2-TPD, FTIR, XPS, SEM, and N2 adsorption/desorption at −196 °C. The raw material was activated and used as a catalyst for the transesterification of canola and sunflower oils with methanol. The conversion of canola and sunflower oils to methyl esters was optimized, under different catalyst amount and oil/methanol ratio, and the maximum conversions were: canola (98.81 ± 0.02 wt.%) and sunflower (96.52 ± 0.43 wt.%).