Biodiesel Production by Reactive Flash: A Numerical Simulation

Reactive flash (RF) in biodiesel production has been studied in order to investigate steady-state multiplicities, singularities, and effect of biodiesel quality when the RF system approaches to bubble point. The RF was modeled by an index-2 system of differential algebraic equations, the vapor split...

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Bibliographic Details
Published inInternational Journal of Chemical Engineering Vol. 2016; no. 2016; pp. 1 - 8
Main Authors Romero, Rubí, Natividad, Reyna, Skogestad, Sigurd, Regalado-Méndez, Alejandro
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Limiteds 01.01.2016
Hindawi Publishing Corporation
Hindawi Limited
Wiley
Subjects
Algebra
Biodiesel
Biodiesel fuels
Bubbles
Computation
Computer simulation
Equilibrium
Mathematical analysis
Mathematical models
Methyl alcohol
Ordinary differential equations
Studies
Triglycerides
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Summary:Reactive flash (RF) in biodiesel production has been studied in order to investigate steady-state multiplicities, singularities, and effect of biodiesel quality when the RF system approaches to bubble point. The RF was modeled by an index-2 system of differential algebraic equations, the vapor split ( ϕ ) was computed by modified Rachford-Rice equation and modified Raoult’s law computed bubble point, and the continuation analysis was tracked on MATCONT. Results of this study show the existence of turning points, leading to a unique bubble point manifold, ( x Biodiesel , T ) = ( 0.46,478.41 K ) , which is a globally stable flashing operation. Also, the results of the simulation in MATLAB® of the dynamic behavior of the RF show that conversion of triglycerides reaches 97% for a residence time of 5.8 minutes and a methanol to triglyceride molar flow ratio of 5 : 1.
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ISSN:1687-806X
1687-8078
DOI:10.1155/2016/7843081