Heterogeneous modeling of an autothermal membrane reactor coupling dehydrogenation of ethylbenzene to styrene with hydrogenation of nitrobenzene to aniline: Fickian diffusion model

Abo-Ghander, Nabeel S.; Logist, Filip; Grace, John R.; Impe, Jan Van; Elnashaie, S.S.E.H.; Lim, C. Jim

doi:10.1016/j.cep.2013.12.009

Cited by 23 publications

(9 citation statements)

References 19 publications

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“…As mentioned before and according to the data reported by AboGhander et al [18] (eqs. (8) and (9)), the equilibrium constant for hydrogenation of the double bond is in the order of 10 10 -10 11 in the temperature range of this work.…”

Section: Kinetic Modelingmentioning

confidence: 79%

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Kinetic study of the selective hydrogenation of styrene over a Pd egg-shell composite catalyst

Betti

Badano

Lederhos

et al. 2015

Reac Kinet Mech Cat

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This is a study on the kinetics of the liquid-phase hydrogenation of styrene to ethylbenzene over a catalyst of palladium supported on an inorganic-organic composite. This support has a better mechanical resistance than other commercial supports, e.g. alumina, and yields catalysts with egg-shell structure and a very thin active Pd layer. Catalytic tests were carried out in a batch reactor by varying temperature, total pressure and styrene initial concentration between 353-393 K, 10-30 bar, and 0.26-0.60 mol L -1 , respectively. Kinetic models were developed on the assumptions of dissociative hydrogen chemisorption and non-negligible adsorption of hydrogen and styrene. Final chemical reaction expressions useful for reactor design were obtained. The models that best fitted the experimental data were those ones that considered the surface reaction as the limiting step. In this sense a two-step Horiuti-Polanyi working mechanism with half hydrogenation intermediates gave the best fit of the experimental data. The heats of adsorption of styrene and ethylbenzene were also estimated.

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Section: Kinetic Modelingmentioning

confidence: 79%

“…The inverse reaction rate was considered negligible on attention to the value of the thermodynamic equilibrium constant at the reaction conditions. This was calculated from the data reported by Abo-Ghanderet al [18] for the dehydrogenation of ethylbenzene to styrene (see eqs. (8) and (9)…”

Section: Mathematical Calculationsmentioning

confidence: 99%

Kinetic study of the selective hydrogenation of styrene over a Pd egg-shell composite catalyst

Betti

Badano

Lederhos

et al. 2015

Reac Kinet Mech Cat

View full text Add to dashboard Cite

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“…Both reactions were catalytically driven, but the catalysts were imbedded in pellets located in the flow streams rather than the membrane separating the streams. Accordingly, heat transfer was a limiting factor as reflected in the prediction of significant temperature differences between the two sides of the reactor and variations in temperature along the length of the hydrogenation side of the reactor as large as 1,000 C. 57 Despite the authors' claim for process intensification, significant gains in reactor throughput would likely be realized by adapting this process to the catalytic wall-type reactor developed by Fukuhara and Igarashi. 53…”

Section: Co-production Of Styrene and Anilinementioning

confidence: 99%

Process Intensification through Directly Coupled Autothermal Operation of Chemical Reactors

Brown

2020

Joule

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“…Styrene monomer (SM) is a valuable material and extensively used in the petrochemical industry to produce polystyrene, styrene-butadiene rubber, acrylonitrile butadiene styrene, and styrene-acrylonitrile copolymers. [1][2][3][4][5][6][7] Several processes are proposed for styrene production. One of those processes is the dehydrogenation of ethylbenzene (EB).…”

Section: Introductionmentioning

confidence: 99%

Exergy analysis of ethylbenzene dehydrogenation to styrene monomer

Damanabi

Bahadori

2018

Energy & Environment

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In this paper, exergetic analysis for dehydrogenation of ethylbenzene over a potassium-promoted iron oxide catalyst for styrene monomer production is investigated. The purpose of the study is to decrease the work loss in the process. Due to the high energy consumption of the unit, exergy analysis was used to optimize the energy consumption of styrene production unit and associated fractionation unit. Preheater, second reactor, and benzene–toluene tower were studied to optimize energy consumption. It is observed that coupling of an Liquified Natural Gas (LNG) type of heat exchanger with preheater improves the exergetic efficiency of the preheater. Also, decreasing the pressure of benzene–toluene column from 220 kPa to 60 kPa increases the exergetic efficiency from 77.45 to 90.86, while by optimizing the oxygen injection rate to the second reactor, the exergetic efficiency increased from 25.76 to 38.07.

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Heterogeneous modeling of an autothermal membrane reactor coupling dehydrogenation of ethylbenzene to styrene with hydrogenation of nitrobenzene to aniline: Fickian diffusion model

Abstract: This document contains the post-print pdf-version of the refereed paper:"Heterogeneous modeling of an autothermal membrane reactor coupling dehydrogenation of ethylbenzene to styrene with hydrogenation of nitrobenzene to aniline: Fickian diffusion model."

Cited by 23 publications

References 19 publications

Kinetic study of the selective hydrogenation of styrene over a Pd egg-shell composite catalyst

Kinetic study of the selective hydrogenation of styrene over a Pd egg-shell composite catalyst

Process Intensification through Directly Coupled Autothermal Operation of Chemical Reactors

Exergy analysis of ethylbenzene dehydrogenation to styrene monomer

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