Preparation and Study of Bimetallic Compounds Efficiency in the Synthesis of Biodiesel Fuel

In this work, biodiesel was obtained by the transesterification of babassu oil into methanol, employing as catalysts heterogeneous CuO/Al₂O₃, CoO/Al₂O₃, and MnO/Al₂O₃. The catalysts were prepared by the method of co-precipitation, which is a mixture prepared using a solution of nitrate of Al³⁺ and n...

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Bibliographic Details
Published in:Catalysis letters 2009-03, Vol.128 (3-4), p.392-400
Main Authors: de Caland, Lilia Basílio, Santos, Lucas Samuel Soares, de Moura, Carla Verônica Rodarte, de Moura, Edmilson Miranda
Format: Article
Language:English
Subjects:
Aluminum oxide
Babassu oil
Bimetals
Biodiesel fuels
Carbonates
Catalysis
Catalysts
Catalytic activity
Chemical precipitation
Chemistry
Chemistry and Materials Science
Cobalt
Copper
Esters
Exact sciences and technology
General and physical chemistry
Industrial Chemistry/Chemical Engineering
Manganese oxides
Methanol
Nitrates
Organometallic Chemistry
Physical Chemistry
Roasting
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Transesterification
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Summary:In this work, biodiesel was obtained by the transesterification of babassu oil into methanol, employing as catalysts heterogeneous CuO/Al₂O₃, CoO/Al₂O₃, and MnO/Al₂O₃. The catalysts were prepared by the method of co-precipitation, which is a mixture prepared using a solution of nitrate of Al³⁺ and nitrate of Cu²⁺, Co²⁺ and Mn²⁺. The catalysts were calcined into two temperatures: 400 °C and 650 °C. The best catalytic activity was obtained with the catalysts calcined at 400 °C because at 650 °C, there was a reduction in the amount of nitrates and carbonates in the structures of catalysts. The conditions for the transesterification reaction's oil babassu using the heterogeneous catalysts were evaluated and the best parameters were: 6:1 (molar ratio oil and methanol time of 24 h. The optimum condition was applied to all biodiesel obtained using the catalysts CuO(0.25)/Al₂O₃ (CuO400), CoO(0.4)/Al₂O₃ (CoO400), and MnO(0.4)/Al₂O₃ (MnO400) with yields of 66.70, 98.23, and 68.10, and for biodiesels transesterified twice obtained with the catalysts CuO(0.25)/Al₂O₃ (CuO650), CoO(0.4)/Al₂O₃ (CoO650), and MnO(0.5)/Al₂O₃ (MnO650) with yields of 83.67, 97.86, and 94.13%,. The use of heterogeneous catalysts was very satisfactory with respect to conversion of methyl esters (biodiesel).
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-008-9762-4