Phase equilibrium modeling in biodiesel production by reactive distillation

Albuquerque, Allan Almeida; Ng, Flora T. T.; Danielski, Leandro; Stragevitch, Luiz

doi:10.1016/j.fuel.2020.117688

Cited by 39 publications

(22 citation statements)

References 81 publications

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“…Second, the other possible oil conversion routes into biolubricants (through estolide formation or epoxidation followed by acetylation) are economically less favorable than transesterification that can be used to produce both bioproducts successively (with biodiesel being a precursor of biolubricants) [3,5,6]. Third, thanks to its intensification, reactive distillation offers significant savings in terms of material and energy consumed and effluents produced [2,7]. Lastly, besides reducing dependence on fossil resources and environmental footprint thanks to their biodegradability, biodiesel and biolubricants also improve the economic and social development of a country through employment opportunities and the required education upstream [2,7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Third, thanks to its intensification, reactive distillation offers significant savings in terms of material and energy consumed and effluents produced [2,7]. Lastly, besides reducing dependence on fossil resources and environmental footprint thanks to their biodegradability, biodiesel and biolubricants also improve the economic and social development of a country through employment opportunities and the required education upstream [2,7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Robust process simulation of biolubricants production from biodiesel requires quantitative and reliable information about the vapor-liquid equilibria (VLE) of mixtures containing alcohols and fatty acid esters, as well as the liquid-liquid and vapor-liquid-liquid equilibria with the presence of glycerol, and eventually water, when dealing with the preliminary biodiesel production step [7,12,13]. Nevertheless, despite the recently published extensive work on phase equilibria involved in biodiesel production [7,13,14], VLE information for the biolubricant production operating under low pressure is still lacking. As an illustration, Table 1 [12,[15][16][17][18][19][20] gives an overview of the low-pressure VLE related to biodiesel components that were published over the past 10 years.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phase equilibria of mixtures involving fatty acid ethyl esters and fat alcohols between 4 and 27 kPa for bioproduct production

Roze

Pignat

Ferreira

et al. 2021

Fuel

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The aim of this paper is to bring valuable phase equilibria information for the design and operation of biolubricant and related biofuel product processes. As a result, Vapor-Liquid Equilibrium (VLE) measurements, at different temperatures, pressures and global compositions, for the ternary systems [Ethanol + 2-Ethyl-1-hexanol + 1-Dodecanol] and [Ethanol + 1-Octanol + 1-Dodecanol], as well as a multicomponent system containing these alcohols together with Balanites aegyptiaca fatty acid ethyl esters are reported for the first time (data pressure and temperature ranges: 4394-26790 Pa, 306-423 K). The Dortmund modified UNIFAC model showed very high accuracy in the prediction of these VLE, with overall average absolute deviations on the liquid and vapor molar compositions of 0.007 and 0.0003 for the ternary systems, 0.003 and 0.006 for the multicomponent system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phase equilibria of mixtures involving fatty acid ethyl esters and fat alcohols between 4 and 27 kPa for bioproduct production

Roze

Pignat

Ferreira

et al. 2021

Fuel

View full text Add to dashboard Cite

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“…For instance, in [2], the authors model the phase equilibrium in biodiesel production by reactive distillation, The model is validated against experimental results for biodiesel production by reactive distillation. In [3], a surrogate-based optimization of distillation columns is investigated, the authors propose an implicit surrogate to cope with output multiplicities of the model.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Comparison of Fuzzy Models and Observers for DC-DC Converters Applied to a Distillation Column Heating Actuator

Heras-Cervantes

Téllez-Anguiano

Anzurez-Marin

et al. 2020

MCA

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In this paper, as an introduction, the nonlinear model of a distillation column is presented in order to understand the fundamental paper that the column heating actuator has in the distillation process dynamics as well as in the quality and safety of the process. In order to facilitate the implementation control strategies to maintain the heating power regulated in the distillation process, it is necessary to represent adequately the heating power actuator behavior; therefore, three different models (switching, nonlinear and fuzzy Takagi–Sugeno) of a DC-DC Buck-Boost power converter, selected to regulate the electric power regarding the heating power, are presented and compared. Considering that the online measurements of the two main variables of the converter, the inductor current and the capacitor voltage, are not always available, two different fuzzy observers (with and without sliding modes) are developed to allow monitoring the physical variables in the converter. The observers response is compared to determine which has a better performance. The role of the observer in estimating the state variables with the purpose of using them in the sensors fault diagnosis, using the analytical redundancy concept, likewise, from the estimation of these variables other non-measurable can be determined; for example, the caloric power. The stability analysis and observers gains are obtained by linear matrix inequalities (LMIs). The observers are validated by MATLAB® simulations to verify the observers convergence and analyze their response under system disturbances.

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“…With the use of reactive separation technology, the methanol used can also be recycled back into reactants so that it is more economical [7]. The use of reactive separation technology in a reaction will accelerate the reaction to reach equilibrium [13]. For some chemical processes, reactive separation provides several advantages, namely: reactive separation is a combination of reactions and separation in one process unit so that the product produced from reactive separation has a high conversion price, high purity price, high selectivity and with the use of reactive separation it can reduce production costs so that they are more economical [14].…”

Section: Introductionmentioning

confidence: 99%

Contribution of the Reactive Separation Process to Methanol Recovery and Biodiesel Characteristics

Pasae

Allo

Bulo

2020

IRJPAC

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The chemical reaction that occurs in the biodiesel processing is a type of reversible reaction between oil and methanol. Therefore, to increase the conversion of the reaction, the amount of methanol used is more than the stoichiometric equilibrium. The excess methanol is often difficult to recover after washing biodiesel. Determine of the contribution of the reactive separation process to methanol recovery and biodiesel characteristics are the focus of this study. The transesterification reaction process is carried out in reactive separation equipment, using palm oil as raw material, NaOH, and super base CaO as the catalyst. The results showed that the reactive separation process could recover methanol as much as 55.88% for the reaction process using a NaOH catalyst, and 52.94% for the reaction process using a super base CaO catalyst. The biodiesel characteristics produced to meet the criteria set out in the Indonesian National Standard.

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Phase equilibrium modeling in biodiesel production by reactive distillation

Cited by 39 publications

References 81 publications

Phase equilibria of mixtures involving fatty acid ethyl esters and fat alcohols between 4 and 27 kPa for bioproduct production

Phase equilibria of mixtures involving fatty acid ethyl esters and fat alcohols between 4 and 27 kPa for bioproduct production

Analysis and Comparison of Fuzzy Models and Observers for DC-DC Converters Applied to a Distillation Column Heating Actuator

Contribution of the Reactive Separation Process to Methanol Recovery and Biodiesel Characteristics

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