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Study on the use of MgAl hydrotalcites as solid heterogeneous catalysts for biodiesel production
Energy (2011)
  • João F Gomes
Abstract
This paper, reports experimental work on the use of new heterogeneous solid basic catalysts for biodiesel production: double oxides of Mg and Al, produced by calcination, at high temperature, of MgAl lamellar structures, the hydrotalcites (HT). The most suitable catalyst system studied are hydrotalcite Mg:Al 2:1 calcinated at 507 ºC and 700 ºC, leading to higher values of FAME also in the second reaction stage. One of the prepared catalysts resulted in 97.1 % Fatty acids methyl esters (FAME) in the 1st reaction step, 92.2 % FAME in the 2nd reaction step and 34 % FAME in the 3rd reaction step. The biodiesel obtained in the transesterification reaction showed composition and quality parameters within the limits specified by the European Standard EN 14214. 2.5% wt catalyst/oil and a molar ratio methanol:oil of 9:1 or 12:1 at 60-65 ºC and 4h of reaction time are the best operating conditions achieved in this study. This study showed the potential of Mg/Al hydrotalcites as heterogeneous catalysts for biodiesel production.
Keywords
  • Biodiesel ; heterogeneous catalysts ; hydrotalcites
Publication Date
December, 2011
Citation Information
João F Gomes. "Study on the use of MgAl hydrotalcites as solid heterogeneous catalysts for biodiesel production" Energy (2011)
Available at: http://works.bepress.com/joao_gomes/49/