Simulated moving bed reactor for p-xylene production: Modeling, simulation, and optimization

Shi, Qian; Gonçalves, Jonathan C.; Ferreira, Alexandre F. P.; Rodrigues, Alírio E.

doi:10.1016/j.ces.2020.115802

Cited by 14 publications

(9 citation statements)

References 25 publications

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“…A slight difference in the kinetic diameter may vary the diffusivity by several orders of magnitude . Experimental evidence of faster diffusion of o ‐xylene compared to m ‐xylene was obtained at 240 °C in liquid phase . In fixed‐bed catalytic experiments with beta and ZSM‐5 catalysts, the conversion of p ‐xylene was similar in both solids, the conversion of o ‐xylene was slightly higher on beta, and a significant difference was observed in the conversion of m ‐xylene.…”

Section: Resultsmentioning

confidence: 95%

Minimum Cross Diameter for C₆–C₁₀ Aromatic Compounds

2019

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The minimum cross diameter of organic species is highly important in catalyst and adsorbent design. In the aromatics industry, the size of the desired compound is the cornerstone of the commonly known shape-selective processes. In spite of the paramount importance of the said sizes, information in the literature is scarce and inconsistent. A thorough methodology was developed using the commercial software ChemBio3D Ultra. The minimum cross diameter of 21 aromatic compounds was calculated including benzene, toluene, ethylbenzene, xylene isomers, ethyltoluene isomers, diethylbenzene isomers, ethylxylene isomers, and trimethylbenzene isomers.

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Section: Resultsmentioning

confidence: 95%

Minimum Cross Diameter for C₆–C₁₀ Aromatic Compounds

2019

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“…Simulated Moving Bed Reactor (SMBR) stands out among multifunctional units due to its efficiency in dealing with equilibriumlimited reactions. It has the capability of removing products from the reaction zone through selective adsorption onto porous catalyst, shifting the equilibrium toward products and, thus, increasing the yield [2][3][4][5]. Periodic switches change inlet (eluent and feed) and outlet (raffinate and extract) streams in a multicolumn system divided into four sections filled in with an adsorptive porous catalyst.…”

Section: Introductionmentioning

confidence: 99%

A Complete Heterogeneous Model for the Production of n-Propyl Propionate Using a Simulated Moving Bed Reactor

et al. 2022

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n-Propyl Propionate (ProPro) is a harmless biodegradable product employed in several fields for the production of drugs, inks, coating, food, and perfume. ProPro is synthesized in an equilibrium reaction for which its yield can be enhanced by constant withdraw of the products as the reaction takes place. Simulated Moving Bed Reactor (SMBR) is a candidate for the production of ProPro with high efficiency as it is a multifunction unit able to simultaneously run reaction and separation, hence shifting the equilibrium reaction toward products. This paper proposes a complete phenomenological model for the ProPro synthesis in a Simulated Moving Bed Reactor (SMBR) packed with the heterogeneous catalyst Amberlyst 46 resin. The operating conditions are defined by the Triangle Theory to design an SMBR unit to produce ProPro efficiently and a comprehensive parameter estimation procedure is employed to obtain more representative parameters. The validated phenomenological model was applied to design an SMBR unit to produce high purity (99.28%) ProPro.

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“…Modeling and design of SMBRs have been of great interest in recent years, and many efforts have been made to improve their performance and extend their usage in a wide range of chemical reactions. A significant number of recent studies on SMBR reactors [20][21][22][23][24][25][26][27][28][29][30] are presented in Tab. S1.…”

Section: Introductionmentioning

confidence: 99%

Modeling of the Isomerization and Separation Process of para‐Xylene in a Moving Bed Reactor

2021

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Simulated moving bed reactors (SMBRs) are hybrid reactors that perform reaction and separation processes simultaneously in a single unit. Their high separation performance and ability to overcome equilibrium constraints on the reaction make them effective in a wide range of equilibrium reactions. This study investigated an SMBR for xylene isomerization and separation of p-xylene from other xylene isomers (free of ethylbenzene) in the liquid phase. The effects of operating variables including temperature, switching time, and columns arrangement on the performance parameters and optimal conditions were determined. Due to the removal of products from the reaction site, the SMBR drives the chemical equilibrium toward producing more product than a conventional reactor under the same conditions.

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Simulated moving bed reactor for p-xylene production: Modeling, simulation, and optimization

Cited by 14 publications

References 25 publications

Minimum Cross Diameter for C₆–C₁₀ Aromatic Compounds

Minimum Cross Diameter for C₆–C₁₀ Aromatic Compounds

A Complete Heterogeneous Model for the Production of n-Propyl Propionate Using a Simulated Moving Bed Reactor

Modeling of the Isomerization and Separation Process of para‐Xylene in a Moving Bed Reactor

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Simulated moving bed reactor for p-xylene production: Modeling, simulation, and optimization

Cited by 14 publications

References 25 publications

Minimum Cross Diameter for C6–C10 Aromatic Compounds

Minimum Cross Diameter for C6–C10 Aromatic Compounds

A Complete Heterogeneous Model for the Production of n-Propyl Propionate Using a Simulated Moving Bed Reactor

Modeling of the Isomerization and Separation Process of para‐Xylene in a Moving Bed Reactor

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Product

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Minimum Cross Diameter for C₆–C₁₀ Aromatic Compounds

Minimum Cross Diameter for C₆–C₁₀ Aromatic Compounds