An integrated reactive distillation process for biodiesel production

Pérez-Cisneros, Eduardo S.; Mena-Espino, Xenia; Rodríguez-López, Verónica; Sales‐Cruz, Mauricio; Viveros, T.; Lobo-Oehmichen, Ricardo

doi:10.1016/j.compchemeng.2016.01.008

Cited by 51 publications

(20 citation statements)

References 18 publications

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“…In particular, the process simulation plays a critical role in the frame of the biodiesel synthesis because of the thermodynamic chemical equilibrium that limits the conversion of the carboxylic acid in the esterification reaction with alcohols. To overcome this limitation, some researchers suggest the application of the reactive distillation technology and report the simulation results of the reaction-distillation steps by using different types of heterogeneous catalysts to achieve process intensification [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

A Simple Pseudo-Homogeneous Reversible Kinetic Model for the Esterification of Different Fatty Acids with Methanol in the Presence of Amberlyst-15

Banchero

Gozzelino

2018

Energies

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Fatty acid esterification with alcohols is a crucial step in biodiesel synthesis. Biodiesel consists of long-chain alkyl esters that derive from the transesterification or hydro-esterification of the triglycerides that are contained in vegetable oils. In the first route, the esterification of the free fatty acids is an important pretreatment of the feed; in the second, it is the main reaction of the industrial process. Knowledge of appropriate kinetic models for the catalytic esterification of fatty acids with alcohols is critical in the design of biodiesel synthesis processes. In this work, the kinetic behavior of the reversible esterification of lauric, myristic, palmitic and stearic acid, which are the most common saturated fatty acids that are contained in triglyceride feedstocks for biodiesel, with methanol at different temperatures (70–150 °C) and molar ratios of the reactants (1:1–1:2–1:5) was investigated in a batch laboratory basket reactor both in the presence and absence of Amberlyst-15 as the catalyst. Results obtained with Amberlyst-15 were fitted through a ready-to-use pseudo-homogeneous reversible model suitable for process design. The kinetic model was compared with that obtained in a previous work with niobium oxide as the catalyst. With respect to the results that were obtained with niobium oxide, the influence of the chain length of the acid on the kinetic behavior was strongly reduced in the presence of Amberlyst-15. This phenomenon was ascribed to a different catalytic mechanism.

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Section: Introductionmentioning

confidence: 99%

A Simple Pseudo-Homogeneous Reversible Kinetic Model for the Esterification of Different Fatty Acids with Methanol in the Presence of Amberlyst-15

Banchero

Gozzelino

2018

Energies

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“…The components retentions are expressed by Equation (17). In order to solve the model equations set discussed above, there is a need to define a set of boundary conditions representing component concentrations at the membrane feed (c m(0 + ),i ) and permeate (c p,i ) sides; the boundary conditions are presented by Equations (18) and (19). In summary, the ddDSPM consists of 17 + 14NC variables (listed in Table 2) in 7 + 11NC equations which were provided with appropriate descriptions in Table 3.…”

Section: Theory Of the Utilized Modelmentioning

confidence: 99%

“…The post-fermentation broth also contains wastes from the fermentation medium: residual glycerol, mineral salts, and minor amounts of polyols and proteins. Therefore, the success of bioconversion is determined by the process of purification [15][16][17][18][19]. Different traditional methods are used to separate organic compounds from the post-fermentation broth e.g., precipitation, distillation, liquid-liquid extraction, ion-exchange, adsorption, crystallization or esterification, however there are alternatives to the traditional purification methods, such as the membrane techniques, for example nanofiltration (NF) [15,20,21], which is one of the newer membrane pressure methods for separation of liquid mixtures.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Total Volume Membrane Charge Density through Mathematical Modeling for Separation of Succinic Acid Aqueous Solutions on Ceramic Nanofiltration Membrane

et al. 2019

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Nanofiltration of aqueous solutions of succinic acid with the addition of sodium hydroxide or magnesium hydroxycarbonate has been investigated experimentally and modeled with the comprehensively described Donnan-Steric partitioning model. The experimental retentions of acid at the same pH varied between 16% and 78%, while the estimated total volume membrane charge densities were in the range of −35.73 and +875.69 mol/m 3 . This work presents a novel insight into the modeling of nanofiltration and investigates the relations between the estimated total volume membrane charge densities, ionic strength, and component concentration on the performance of ceramic membrane. In addition, this study takes into consideration other parameters such as pH regulation and viscosities of solutions.

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“…The ester product attained 98% purity while the byproduct water was 99.9 mol%. Pérez-Cisneros et al [30] obtained 99.92 mol% biodiesel and 99.97 mol% byproduct water using integrated dual RD columns in their simulations. Moreover, the researchers have also proposed efficient heat exchange networks for heat integration [23,31].…”

Section: Introductionmentioning

confidence: 99%

Energy Optimization and Effective Control of Reactive Distillation Process for the Production of High Purity Biodiesel

et al. 2021

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Biodiesel is a promising renewable energy option that significantly reduces the emission of greenhouse gases and other toxic byproducts. However, a major challenge in the industrial scale production of biodiesel is the desired product purity. To this end, reactive distillation (RD) processes, which involve simultaneous removal of the byproduct during the transesterification reaction, can drive the equilibrium towards high product yield. In the present study, we first optimized the heat exchange network (HEN) for a high purity RD process leading to a 34% reduction in the overall energy consumption. Further, a robust control scheme is proposed to mitigate any feed disturbance in the process that may compromise the product purity. Three rigorous case studies are performed to investigate the effect of composition control in the cascade with the temperature control of the product composition. The cascade control scheme effectively countered the disturbances and maintained the fatty acid mono-alkyl ester (FAME) purity.

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An integrated reactive distillation process for biodiesel production

Cited by 51 publications

References 18 publications

A Simple Pseudo-Homogeneous Reversible Kinetic Model for the Esterification of Different Fatty Acids with Methanol in the Presence of Amberlyst-15

A Simple Pseudo-Homogeneous Reversible Kinetic Model for the Esterification of Different Fatty Acids with Methanol in the Presence of Amberlyst-15

Assessment of the Total Volume Membrane Charge Density through Mathematical Modeling for Separation of Succinic Acid Aqueous Solutions on Ceramic Nanofiltration Membrane

Energy Optimization and Effective Control of Reactive Distillation Process for the Production of High Purity Biodiesel

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