Sulfonated rim rubber used as a solid catalyst for the biodiesel production with oleic acid and optimized by Box-Behnken method

August 13, 2020

Title

Sulfonated rim rubber used as a solid catalyst for the biodiesel production with oleic acid and optimized by Box-Behnken method

Author

L.A. Sánchez-Olmos, M. Sánchez-Cárdenas , K. Sathish-Kumar , D.N. Tirado-González , F.J. Rodríguez-Valadez

Year

2020

Journal

Revista Mexicana de Ingeniería Química

Abstract

Esterification of oleic acid was carried out to obtain methyl esters at temperatures below the critical point of methanol in the
presence of sulfonated carbon. That was obtained by pyrolysis from tire rubber and use as catalytic support after sulfonated. The
sulfonated carbonaceous material in the laboratory was analyzed by spectroscopy and microscopic techniques: IR spectroscopy,
X-ray diffractometry, programmed desorption at a temperature (ICTAC), X-ray photoelectron spectroscopy and scanning electron
microscopy. The physicochemical properties of catalyst favor high performance in the production of biodiesel from oleic acid,
are easily separated from the liquid mixture at the end of the reaction. At the temperature of 200 °C, with a reaction time of
20 min and a catalyst amount of 0.03% by weight, was the optimal experimental conditions for the esterification of oleic acid
with methanol, giving a conversion of 97.9% of free fatty acids according to the response surface method. The Box-Behnken
experiments were applied in order to evaluate the effects of the production parameters of biodiesel and find out the optimal
conditions to obtain the maximum yield. Interestingly, stable catalytic activity in several reaction cycles was found.
Keywords: biodiesel production, solid acid catalyst, sulfonation treatment, Box-Behnken method, reaction cycles

Instrument

NRS-5100

Keywords

Raman Imaging Spectroscopy, Biodiesel production; solid acid catalyst; sulfonation treatment; Box-Behnken method; reaction cycles