Sorption enhanced reactive process for the synthesis of glycerol ethyl acetal

Faria, Rui P. V.; Pereira, Carla; Silva, Viviana M. T. M.; Loureiro, José M.; Rodrigues, Alı́rio E.

doi:10.1016/j.cej.2014.07.073

Cited by 24 publications

(14 citation statements)

References 49 publications

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“…In the present work, the synthesis of solketal in a fixed bed adsorptive reactor was studied to evaluate the possibility of exploiting the synergetic effects arising from the combination of chromatographic separation with chemical reaction. The advantages reported for sorption-enhanced reactive processes for the synthesis of acetals, − esters, − and ethers, among other organic compounds, will be similar to those attained when applying this technology to the ketalization of glycerol with acetone to produce this ketal. As suggested earlier, the selection of adequate stationary and mobile phases is a critical factor governing the performance of the process.…”

Section: Introductionmentioning

confidence: 70%

“…The estimated Peclet number is in line with the range of values presented in many works dealing with similar systems. 29,43 It is important to mention that none of these variables showed a dependence on the flow rate value within the studied range of operating conditions (2.0 mL•min −1 to 7.5 mL•min −1 ).…”

Section: Industrial and Engineeringmentioning

confidence: 88%

“…37 Moreover, it has been thoroughly applied to similar systems with good results. 26,27,29,47 As stated in the "Experimental Procedure and Setup" section, the frontal analysis technique consists in feeding a mixture of known composition to a fixed bed previously saturated with another mixture, until it becomes saturated with the new feed. If the initial composition of the bed is known, then the composition of the solid phase in equilibrium with the liquid phase can be estimated through the global mass balance of the system described by eqs 24 and 25, which allow the computation of the molar amount adsorbed in or desorbed from the solid phase, n ads/des , when going from one equilibrium point to the other.…”

Section: Industrial and Engineeringmentioning

confidence: 99%

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Solketal Production in a Fixed Bed Adsorptive Reactor through the Ketalization of Glycerol

Moreira

Corrêa

Ribeiro

et al. 2020

Ind. Eng. Chem. Res.

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Biodiesel production has been generating increasing amounts of glycerol as byproduct, therefore effective strategies are required to convert it into valuable chemicals to enhance the sustainability of the biodiesel production chain. In this work, solketal was synthesized by reacting glycerol with acetone (in the presence of ethanol) in a fixed bed adsorptive reactor packed with Amberlyst-35. Additionally, adsorption equilibrium isotherms for all the compounds of the process were determined at 313 K through a frontal analysis methodology, and the results were fitted through a competitive multicomponent Langmuir model. It was possible to conclude that water was the most adsorbed compound while solketal was the least. The potential for implementation of sorptionenhanced reactive processes was experimentally demonstrated since the conversion values transitorily attained during the solketal synthesis process were approximately 30% above the equilibrium values. Finally, all the experimental results were accompanied by numerical simulation using a comprehensive mathematical model that was able to accurately describe the results.

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Section: Introductionmentioning

confidence: 70%

Section: Industrial and Engineeringmentioning

confidence: 88%

Section: Industrial and Engineeringmentioning

confidence: 99%

See 1 more Smart Citation

Solketal Production in a Fixed Bed Adsorptive Reactor through the Ketalization of Glycerol

Moreira

Corrêa

Ribeiro

et al. 2020

Ind. Eng. Chem. Res.

Self Cite

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“…Other ketalizations that can be performed in RC using an acid ion-exchange resin catalyst at a temperature below room temperature are ethanol–acetone, propanol–acetone, methanol–2 butanone, methanol–3 pentanone, methanol–methyl ethyl ketone, methanol–cyclohexanone, and ethylene glycol–acetone reactions. Faria et al , have performed SMBR study on acetalization of glycerol with acetaldehyde, assisted by solvents such as dimethyl sulfoxide. Mass transfer resistance across the column due to high viscosity of glycerol and oligomerization reactions of acetaldehyde on the acid catalyst was minimized with the use of a solvent.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Solvent-Assisted Reactive Chromatography for the Synthesis of 2,2 Di-Methoxy Propane

Singh

Solanki

Yadav

et al. 2021

Ind. Eng. Chem. Res.

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Reactive chromatography is beneficial for a reaction where reaction equilibrium limits productivity, the product forms azeotropes with the reactants, and product separation is difficult due to nonideality in the phase equilibrium. 2,2 Di-methoxy propane (DMP) production from methanol and acetone is one such example where DMP equilibrium conversion is less than 15% at 15 °C reaction temperature in a conventional batch process. Furthermore, DMP forms azeotropes with acetone and methanol, and product separation is difficult due to nonideality in the phase equilibrium. In this work, synthesis of DMP from methanol and acetone using an acidic resin (Amberlyst-15) as an adsorbent/catalyst is investigated in a fixed-bed chromatographic reactor (FBCR). Addition of solvents such as hexane or cyclohexane into the reaction system in the FBCR favorably influences the affinity of acetone and DMP to the catalyst bed. The addition of equal molar amounts of hexane and acetone results in an increase in the affinity of acetone toward the resin and a decrease in the affinity of DMP toward the resin. Thus, with the aid of solvents, one can completely exhaust the acetone in the reaction regime and thus decrease the downstream processing cost drastically. Moreover, DMP yield increases threefold compared to the case when a solvent is not used. The parameters in the reaction kinetics, dispersion coefficient, and adsorption parameter were estimated by conducting independent experiments in the FBCR. The reaction kinetics and adsorption isotherm results are obtained from the FBCR implemented in the model, which predicts the results that are in good agreement with the experimental data.

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“…Carboxylic acid Alcohol Ester Water Up to today, in PV-esterification coupling systems, several types of commercial membranes have been used [50], including PERVATECH BV [13][14][15][16][17][18][19][20], GFT-1005 [67], polydimethylsiloxane [68], …”

Section: Model Reactions In Pv Assisted Processesmentioning

confidence: 99%

Potential of Pervaporation and Vapor Separation with Water Selective Membranes for an Optimized Production of Biofuels—A Review

2017

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Abstract:The development of processes based on the integration of new technologies is of growing interest to industrial catalysis. Recently, significant efforts have been focused on the design of catalytic membrane reactors to improve process performance. In particular, the use of membranes, that allow a selective permeation of water from the reaction mixture, positively affects the reaction evolution by improving conversion for all reactions thermodynamically or kinetically limited by the presence of water. In this paper, how pervaporation (PV) and vapor permeation (VP) technologies can improve the catalytic performance of reactions of industrial interest is considered. Specifically, technological approaches proposed in the literature are discussed with the aim of highlighting advantages and problems encountered in order to address research towards the optimization of membrane reactor configurations for liquid biofuel production in large scale.

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Sorption enhanced reactive process for the synthesis of glycerol ethyl acetal

Cited by 24 publications

References 49 publications

Solketal Production in a Fixed Bed Adsorptive Reactor through the Ketalization of Glycerol

Solketal Production in a Fixed Bed Adsorptive Reactor through the Ketalization of Glycerol

Feasibility of Solvent-Assisted Reactive Chromatography for the Synthesis of 2,2 Di-Methoxy Propane

Potential of Pervaporation and Vapor Separation with Water Selective Membranes for an Optimized Production of Biofuels—A Review

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