Improving the Performance of a Simulated Moving Bed Reactor for the Synthesis of Solketal by Implementing Multifeed Strategy

Faria, Rui P. V.; Gonçalves, Jonathan C.; Corrêa, Isabella; Ribeiro, Ana M.; Rodrigues, Alı́rio E.

doi:10.1021/acs.iecr.2c01352

Cited by 3 publications

(1 citation statement)

References 57 publications

(107 reference statements)

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“…Previous studies have shown that, if an efficient process integration strategy is achieved and the eluent is recirculated to the process, production costs could be decreased by 44% compared to conventional processes [243]. Subsequently, the same authors carried out a process improvement, finding that, under optimum conditions, the maximum productivity is 10 kg of solketal per liter of adsorbent per day, with the desorbent (ethanol) consumption being below 6 L per kg of solketal produced [244].…”

Section: Latest Technological Advancesmentioning

confidence: 99%

Transformations of Glycerol into High-Value-Added Chemical Products: Ketalization and Esterification Reactions

Perez,

Gatti,

Santori

et al. 2023

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Biomass allows us to obtain energy and high-value-added compounds through the use of different physical and chemical processes. The glycerol obtained as a by-product in the synthesis of biodiesel is considered a biomass compound that has the potential to be used as a raw material to obtain different chemical products for industry. The development and growth of the biodiesel industry allows for the projection of glycerol biorefineries around these plants that efficiently and sustainably integrate the biodiesel production process together with the glycerol transformation processes. This work presents a review of the ketalization and esterification of glycerol to obtain solketal and acetylglycerols, which are considered products of high added value for the chemical and fuel industry. First, the general aspects and mechanisms of both reactions are presented, as well as the related chemical equilibrium concepts. Subsequently, the catalysts employed are described, classifying them according to their catalytic nature (zeolites, carbons, exchange resins, etc.). The reaction conditions used are also described, and the best results for each catalytic system are presented. In addition, stability studies and the main deactivation mechanisms are discussed. Finally, the work presents the kinetic models that have been formulated to date for some of these systems. It is expected that this review work will serve as a tool for the advancement of studies on the ketalization and esterification reactions that allow for the projection of biorefineries based on glycerol as a raw material.

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Section: Latest Technological Advancesmentioning

confidence: 99%

Transformations of Glycerol into High-Value-Added Chemical Products: Ketalization and Esterification Reactions

Perez,

Gatti,

Santori

et al. 2023

Reactions

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Enhanced simulated moving bed reactor performance for the synthesis of solketal by implementing the ModiCon strategy

Corrêa,

Faria,

Rodrigues

2023

Adsorption

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The need to extend the range of potential uses for the Simulated Moving Bed Reactor (SMBR) leads the development of new operational strategies that enable the equipment to perform increasingly difficult reactions and separations. Solketal is the valorization product from the reaction between glycerol and acetone, a thermodynamic limited process that faces miscibility and selectivity issues. In this work, the ModiCon SMBR is proposed and optimized aiming to overcome the difficulties of solketal synthesis in the Conventional SMBR. The optimization is based on the “Reactive-Separation Volumes” methodology, a well-established procedure followed for optimizing numerous other SMBR processes. The results demonstrate that the new SMBR operating mode can produce solketal with a purity of 97%, reaching a productivity of over 9.69 $${\text{kg}}_{{{\text{Solk}}}} {\text{ L}}_{{{\text{Ads}}}}^{{ - {1}}} {\text{ day}}^{{ - {1}}}$$ kg Solk L Ads - 1 day - 1 , 38% higher than the Multifeed, another non-conventional strategy proposed in the open literature for the synthesis of solketal. The desorbent consumption is 6.76 $${\text{L}}_{{{\text{Desorbent}}}} \,{\text{kg}}_{{{\text{Prod}}}}^{ - 1} ,$$ L Desorbent kg Prod - 1 , 35% higher than the Multifeed. The most impressive result is the decrease in the reactants consumption of 12%. Such results demonstrate that this strategy intensifies the process even more than other non-conventional operating strategies proposed in the literature, which makes it more appealing to be implemented in the large scale solketal production.

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Estimation of specific reactivities of commercial gel-type resins through modeling the chain sequences distribution

Aguiar,

M. Godoy,

Lotufo

et al. 2024

Chemical Engineering Communications

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Improving the Performance of a Simulated Moving Bed Reactor for the Synthesis of Solketal by Implementing Multifeed Strategy

Cited by 3 publications

References 57 publications

Transformations of Glycerol into High-Value-Added Chemical Products: Ketalization and Esterification Reactions

Transformations of Glycerol into High-Value-Added Chemical Products: Ketalization and Esterification Reactions

Enhanced simulated moving bed reactor performance for the synthesis of solketal by implementing the ModiCon strategy

Estimation of specific reactivities of commercial gel-type resins through modeling the chain sequences distribution

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