Sodium phosphate as a solid catalyst for biodiesel preparation

Sodium phosphate (Na3PO4) was chosen as catalyst for biodiesel preparation from rapeseed oil. The effects of mass ratio of catalyst to oil, molar ratio of methanol to oil, reaction temperature and rotation speed on biodiesel yield were investigated. For a mass ratio of catalyst to oil of 3%, molar r...

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Bibliographic Details
Published inBrazilian journal of chemical engineering Vol. 27; no. 1; pp. 137 - 144
Main Authors Jiang, S. T., Zhang, F. J., Pan, L. J.
Format Journal Article
LanguageEnglish
Published Brazilian Society of Chemical Engineering 01.03.2010
Subjects
ENGINEERING, CHEMICAL
Solid base
Concentration of catalyst
Sodium phosphate
Activity loss
Biodiesel
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Summary:Sodium phosphate (Na3PO4) was chosen as catalyst for biodiesel preparation from rapeseed oil. The effects of mass ratio of catalyst to oil, molar ratio of methanol to oil, reaction temperature and rotation speed on biodiesel yield were investigated. For a mass ratio of catalyst to oil of 3%, molar ratio of methanol to oil of 9:1, reaction temperature of 343K and rotation speed of 600rpm, the transesterification was nearly completed within 20 minutes. Na3PO4 has a similar activity to homogeneous catalysts. Na3PO4 could be used repeatedly for 8 runs without any activation treatment and no obvious activity loss was observed. The concentrations of catalyst in biodiesel ranged from 0.6 to 0.7 mg/g. Compared to Na3PO4, Na3PO4.10H2O was cheaper, but the final yield was 71.3%, much lower than that of Na3PO4 at 99.7%.
ISSN:0104-6632
1678-4383
0104-6632
DOI:10.1590/S0104-66322010000100012