The experimental parameters for biodiesel production from para rubber seed oil and
methanol using a SO3H-MCM-41 catalyst were optimized statistically. The SO3H-MCM-41 catalyst
was synthesized by co-condensation in the presence of tetraethyl orthosilicate, 3-mercaptopropyl
(methyl) dimethoxysilane (MPMDS) and cetyl-trimethylammonium bromide. In the last step,
the solid catalyst (SH-MCM41) was oxidized by H2O2 to SO3H-MCM-41. The acid capacity of
the obtained SO3H-MCM-41 catalyst was quantified by back titration with 0.1 M sodium hydroxide.
The physical and chemical properties of the SO3H-MCM-41 were characterized by nitrogen
adsorption/desorption, X-ray diffractometry, Fourier transform infrared spectroscopy and thermogravimetric
analysis. The effect of varying the catalyst loading (wt.%), reaction time (h) and temperature
(C) and molar composition of MPMDS on the biodiesel yield were investigated using a 2k
factorial design. The optimal conditions to maximize the biodiesel yield, obtained from the response
surface analysis using a Box–Behnken design, was a 14.5 wt.% catalyst loading, and a reaction time
and temperature of 48 h and 129.6 C. Under these conditions a fatty acid methyl ester (biodiesel)
yield of 84% was predicted, and an 83.10 ± 0.39% yield experimentally obtained.
ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is
an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
The experimental parameters for biodiesel production from para rubber seed oil andmethanol using a SO3H-MCM-41 catalyst were optimized statistically. The SO3H-MCM-41 catalystwas synthesized by co-condensation in the presence of tetraethyl orthosilicate, 3-mercaptopropyl(methyl) dimethoxysilane (MPMDS) and cetyl-trimethylammonium bromide. In the last step,the solid catalyst (SH-MCM41) was oxidized by H2O2 to SO3H-MCM-41. The acid capacity ofthe obtained SO3H-MCM-41 catalyst was quantified by back titration with 0.1 M sodium hydroxide.The physical and chemical properties of the SO3H-MCM-41 were characterized by nitrogenadsorption/desorption, X-ray diffractometry, Fourier transform infrared spectroscopy and thermogravimetricanalysis. The effect of varying the catalyst loading (wt.%), reaction time (h) and temperature(C) and molar composition of MPMDS on the biodiesel yield were investigated using a 2kfactorial design. The optimal conditions to maximize the biodiesel yield, obtained from the responsesurface analysis using a Box–Behnken design, was a 14.5 wt.% catalyst loading, and a reaction timeand temperature of 48 h and 129.6 C. Under these conditions a fatty acid methyl ester (biodiesel)yield of 84% was predicted, and an 83.10 ± 0.39% yield experimentally obtained.ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This isan open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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