Modelagem cinética de biodiesel produzido a partir de subproduto usando hidrotalcita-hidroxiapatita como catalisador

Renata Nazaré Vilas Bôas; Lindoval Domiciano Fernandes; Marisa Fernandes Mendes

doi:10.18540/jcecvl11iss1pp21307

Authors

Renata Nazaré Vilas Bôas Universidade Federal Rural do Rio de Janeiro, Brazil
Lindoval Domiciano Fernandes Universidade Federal Rural do Rio de Janeiro, Brazil https://orcid.org/0000-0002-6509-5552
Marisa Fernandes Mendes Universidade Federal Rural do Rio de Janeiro, Brazil

DOI:

https://doi.org/10.18540/jcecvl11iss1pp21307

Keywords:

Biodiesel. Kinetic modeling. Hydrotalcite. Hydroxyapatite. Residual raw material.

Abstract

Computer simulation is a highly effective tool for conducting comprehensive technical, economic, and environmental assessments of various processes. Commercial simulators are available that offer user-friendly interfaces and vast databases to assist in this analysis. However, it is important to highlight that when it comes to certain compounds, especially those related to biocompounds, there are still significant gaps in our understanding of the properties of these substances. Kinetic modeling of the reaction involving biodiesel derived from vegetable oil deodorization distillate (VODD) was conducted using hydrotalcite-hydroxyapatite (HT-HAp) as a catalyst, aiming to determine the reaction order and estimate the reaction rate constant. The reaction rate constant was determined by kinetic studies conducted at a constant temperature of 70 °C with a reaction time of 6 h from data obtained by the percentage conversion of ethyl esters (biodiesel). The rate constant (k) was determined from the slope of the graph of [-ln(1 - X)] as a function of time (t). However, it was possible to observe that the reaction studied behaved according to pseudo-first order kinetics.

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