Ethers from Ethanol. 1. Equilibrium Thermodynamic Analysis of the Liquid-Phase Ethyl tert-Butyl Ether Reaction (ETBE)

Jensen, Kyle; Datta, Ravindra

doi:10.1021/ie00040a043

Cited by 71 publications

(77 citation statements)

References 9 publications

(15 reference statements)

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“…This assumption has previously been tested for a wide range of catalyst concentrations using detailed models of the reaction kinetics (Sneesby et al, 1997b). The ETBE reaction model of Jensen and Datta (1995) was used to provide the necessary equilibrium data. The UNIFAC model was used to predict the liquid-phase nonidealities, and all calculations were made in terms of component activities rather than concentrations.…”

Section: Etbe Product)mentioning

confidence: 99%

Detrimental influence of excessive fractionation on reactive distillation

et al. 1998

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Section: Etbe Product)mentioning

confidence: 99%

Detrimental influence of excessive fractionation on reactive distillation

et al. 1998

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“…Activation energies and kinetic constants values have been published, concluding that a Rideal-Eley mechanism fits better for the liquid phase ETBE synthesis from IB and EtOH and that a Langmuir-Hinshelwood model describes better the liquid phase reaction between IA and EtOH to produce TAEE. Thermodynamics of these reactions for the isolated systems has also been studied and equilibrium constants, enthalpies and entropies of formation and reaction have been determined (Fitó and Linnekoski, 2008;Gómez et al, 1997;Izquierdo et al, 1994;Jensen and Datta, 1995;Kitchaiya and Datta, 1995;Linnekoski et al, 1998Linnekoski et al, , 1999Muja et al, 2005;Rihko and Krause, 1993;Rihko et al, 1994;Sharonov et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Equilibrium of the simultaneous etherification of isobutene and isoamylenes with ethanol in liquid-phase

Fité

Ramírez

Cunill

2014

Chemical Engineering Research and Design

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ARTICLE IN PRESS CHERD-1418; No. of Pages 13 chemical engineering research and design x x x ( 2 0 1 3 ) xxx-xxx ethyl tert-butyl ether formation, tert-amyl ethyl ether formation from isoamylenes (2-methyl-1-butene and 2-methyl-2-butene) and isomerization reaction between both isoamylenes. Equilibrium data were obtained in a batchwise IntroductionIn order to reduce hazardous and evaporative gasoline exhausts and from refueling emissions, as well as their environmental impact at the time that engines energetic efficiency is enhanced, new legislation and major efforts have been devoted to fuel reformulation. The European Directive 2009/28/EC promotes the usage of combustibles from renewable resources, such as bioethanol, and the directive 2009/30/EC establishes the main guidelines related to fuel reformulation.As it is well known, olefins of the C 5 fraction from oil, mainly the reactive isoamylenes (IA) 2-methyl-1-butene (2M1B) and 2-methyl-2-butene (2M2B), present some disadvantages as components of a gasoline, particularly in tropical zones. This is because these are the olefins with the highest * Corresponding author. Tel.: +34 934034769; fax: +34 934021291. E-mail addresses: rsotolop7@alumnes.ub.edu (R. Soto), fite@ub.edu (C. Fité), eliana.ramirez-rangel@ub.edu (E. Ramírez), rogerbringue@ub.edu (R. Bringué), fcunill@ub.edu (F. Cunill).Received 25 Reid vapor pressure (RVP), the highest atmospheric reactivity, the highest potential of tropospheric ozone formation (around 90%) and these are the largest amount of the olefins present in a gasoline (above 25 wt.% of the C 5 fraction from fluid catalytic cracking, FCC) (Rock et al., 1992). Thus, to diminish the impact of their use as fuel components on the environment, the reduction of the content of these compounds by means of either its etherification with primary alcohols or via oligomerization would result in a more suitable alternative than the reduction of the total olefin content of a gasoline. Oxygenated compounds have been gradually gaining importance in the gasoline market since lead compounds were banned as octane enhancers. The two main types of oxygenates used as high octane additives are alcohols and ethers. Among alcohols, the most widely used is ethanol (EtOH), whereas the main tertiary ethers are methyl tert-buty ether

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“…To account the nonideal behavior of the components in the reaction mixture, UNIFAC was considered as the suitable thermodynamic package to calculate the activity coefficients and to represent the phase equilibrium of the system accurately .…”

Section: Synthesis Of Etbementioning

confidence: 99%

Optimization of Reactive Dividing‐Wall Distillation Column for Ethyl t‐Butyl Ether Synthesis

Kaur

Sangal

2018

Chem Eng & Technol

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Ethyl t‐butyl ether (ETBE) was synthesized via reaction of ethanol and isobutene by means of a reactive dividing‐wall distillation column (RDWC). The RDWC was simulated using the RADFRAC model of Aspen Plus. Multi‐response optimization by response surface methodology (RSM) with desirability function approach was applied for maximizing product purities and minimizing energy requirements and CO2 emissions simultaneously with a constraint that the difference in pressure drop across the dividing wall should be zero. The prediction from the RSM optimization agrees well with the simulation. The optimized RDWC provided an excellent purity of 99.99 mol % of the product ETBE with about one‐third reduction in energy requirements and CO2 emissions as compared to reactive distillation.

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Ethers from Ethanol. 1. Equilibrium Thermodynamic Analysis of the Liquid-Phase Ethyl tert-Butyl Ether Reaction (ETBE)

Cited by 71 publications

References 9 publications

Detrimental influence of excessive fractionation on reactive distillation

Detrimental influence of excessive fractionation on reactive distillation

Equilibrium of the simultaneous etherification of isobutene and isoamylenes with ethanol in liquid-phase

Optimization of Reactive Dividing‐Wall Distillation Column for Ethyl t‐Butyl Ether Synthesis

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