Kinetic evaluation of decomposition of different types of biodiesel by means of thermogravimetry

Authors

  • Ramón Piloto Rodríguez
  • Roger Sierens
  • Sebastian Verhelst

Abstract

The purpose of this work is to evaluate the thermal and kinetic behavior of biodiesel derived from
three natural oil sources and a reference diesel. The biodiesel samples come from soybean, higuereta and beet oils,
and a standard diesel sample as reference. The kinetic parameters were obtained by thermal analysis, estimating
reaction order, pre-exponential factor and activation energy. For estimation of them a kinetic model based on
Vyazovkin theory was used. The selection criterion of best fits was based on correlation coefficient of the linear
regression and compensation effect of the kinetic parameters. The criterion of best fit for the models is based on
the best correlation coefficients obtained for the Arrhenius plots and the study of the compensation effect. The
thermogravimetric profile of biodiesel samples indicated one decomposition step, with similar mass loss curves
and the first derivatives, and different from the obtained for diesel respect onset and offset temperatures of their
thermal decomposition processes. The diesel activation energy varies between 41 and 44 kJ · mol–1 and between 52
and 67 kJ · mol–1 for biodiesel samples. The evaluated reaction order is first order in case of diesel and 1,2 respect
biodiesel. The biodiesel thermal stability is higher than diesel.

Published

2020-12-28

How to Cite

Piloto Rodríguez, R. ., Sierens, R. ., & Verhelst, S. . (2020). Kinetic evaluation of decomposition of different types of biodiesel by means of thermogravimetry. NATIONAL CENTER FOR SCIENTIFIC RESEARCH (CENIC) CHEMICAL SCIENCES JOURNAL, 40(3), 139-142. Retrieved from https://revista.cnic.edu.cu/index.php/RevQuim/article/view/835

Issue

Section

Research articles