Production of biodiesel from microalgae oil (Chlorella protothecoides) by non-catalytic transesterification: Evaluation of reaction kinetic models and phase behavior

Jiuxu Liu, Ronghong Lin, Yue Nan, Lawrence L Tavlarides

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21 Citations (Scopus)

Abstract

The non-catalytic transesterification of microalgae oil with methanol was conducted at 300-400°C, 150-300 bar, methanol-to-oil molar ratio (MOMR) of 6-12, and residence time of 0.5-10 min. A visualization system was built to study the phase transition, and it shows that at the conditions (T: 300-400°C, P: 200 bar, τ: 0.5-10 min, MOMR of 9), the reactions were performed in homogeneous state. The dynamic phase behavior of the reacting systems was also investigated by RK-Aspen Equation of State. The results indicate that at 200 bar, MOMR of 9, and 300-385°C, the reacting mixtures were in liquid state and moved toward supercritical region, while at 400°C the reacting system was initially in liquid state and quickly approached supercritical state due to the fast reaction conversion. The critical points of the reaction mixtures were estimated. Ten commonly used kinetic models were evaluated, and it shows that three-step, reversible second-order model worked best in the data fitting. Reaction rate constants and activation energies for selected models were determined and compared with literature data.

Original languageEnglish (US)
Pages (from-to)38-50
Number of pages13
JournalJournal of Supercritical Fluids
Volume99
DOIs
StatePublished - 2015

Fingerprint

Chlorella
Biofuels
Transesterification
Phase behavior
Biodiesel
Reaction kinetics
Methanol
Oils
reaction kinetics
methyl alcohol
oils
evaluation
Liquids
liquids
Equations of state
Reaction rates
Rate constants
critical point
equations of state
Visualization

Keywords

  • Biodiesel
  • Microalgae oil
  • Non-catalytic transesterification
  • Phase behavior
  • Reaction kinetic models evaluation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

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title = "Production of biodiesel from microalgae oil (Chlorella protothecoides) by non-catalytic transesterification: Evaluation of reaction kinetic models and phase behavior",
abstract = "The non-catalytic transesterification of microalgae oil with methanol was conducted at 300-400°C, 150-300 bar, methanol-to-oil molar ratio (MOMR) of 6-12, and residence time of 0.5-10 min. A visualization system was built to study the phase transition, and it shows that at the conditions (T: 300-400°C, P: 200 bar, τ: 0.5-10 min, MOMR of 9), the reactions were performed in homogeneous state. The dynamic phase behavior of the reacting systems was also investigated by RK-Aspen Equation of State. The results indicate that at 200 bar, MOMR of 9, and 300-385°C, the reacting mixtures were in liquid state and moved toward supercritical region, while at 400°C the reacting system was initially in liquid state and quickly approached supercritical state due to the fast reaction conversion. The critical points of the reaction mixtures were estimated. Ten commonly used kinetic models were evaluated, and it shows that three-step, reversible second-order model worked best in the data fitting. Reaction rate constants and activation energies for selected models were determined and compared with literature data.",
keywords = "Biodiesel, Microalgae oil, Non-catalytic transesterification, Phase behavior, Reaction kinetic models evaluation",
author = "Jiuxu Liu and Ronghong Lin and Yue Nan and Tavlarides, {Lawrence L}",
year = "2015",
doi = "10.1016/j.supflu.2015.01.010",
language = "English (US)",
volume = "99",
pages = "38--50",
journal = "Journal of Supercritical Fluids",
issn = "0896-8446",
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TY - JOUR

T1 - Production of biodiesel from microalgae oil (Chlorella protothecoides) by non-catalytic transesterification

T2 - Evaluation of reaction kinetic models and phase behavior

AU - Liu, Jiuxu

AU - Lin, Ronghong

AU - Nan, Yue

AU - Tavlarides, Lawrence L

PY - 2015

Y1 - 2015

N2 - The non-catalytic transesterification of microalgae oil with methanol was conducted at 300-400°C, 150-300 bar, methanol-to-oil molar ratio (MOMR) of 6-12, and residence time of 0.5-10 min. A visualization system was built to study the phase transition, and it shows that at the conditions (T: 300-400°C, P: 200 bar, τ: 0.5-10 min, MOMR of 9), the reactions were performed in homogeneous state. The dynamic phase behavior of the reacting systems was also investigated by RK-Aspen Equation of State. The results indicate that at 200 bar, MOMR of 9, and 300-385°C, the reacting mixtures were in liquid state and moved toward supercritical region, while at 400°C the reacting system was initially in liquid state and quickly approached supercritical state due to the fast reaction conversion. The critical points of the reaction mixtures were estimated. Ten commonly used kinetic models were evaluated, and it shows that three-step, reversible second-order model worked best in the data fitting. Reaction rate constants and activation energies for selected models were determined and compared with literature data.

AB - The non-catalytic transesterification of microalgae oil with methanol was conducted at 300-400°C, 150-300 bar, methanol-to-oil molar ratio (MOMR) of 6-12, and residence time of 0.5-10 min. A visualization system was built to study the phase transition, and it shows that at the conditions (T: 300-400°C, P: 200 bar, τ: 0.5-10 min, MOMR of 9), the reactions were performed in homogeneous state. The dynamic phase behavior of the reacting systems was also investigated by RK-Aspen Equation of State. The results indicate that at 200 bar, MOMR of 9, and 300-385°C, the reacting mixtures were in liquid state and moved toward supercritical region, while at 400°C the reacting system was initially in liquid state and quickly approached supercritical state due to the fast reaction conversion. The critical points of the reaction mixtures were estimated. Ten commonly used kinetic models were evaluated, and it shows that three-step, reversible second-order model worked best in the data fitting. Reaction rate constants and activation energies for selected models were determined and compared with literature data.

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KW - Phase behavior

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