Computer aided design of reactive distillation processes for the treatment of waste waters polluted with acetic acid

Gangadwala, Jignesh; Rădulescu, Gabriel; Kienle, Achim; Sundmacher, Kai

doi:10.1016/j.compchemeng.2007.01.002

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…n-BuAc (N 96%) was obtained using only one reactive distillation column with 26 theoretical stages; a high-purity product (N99%) was obtained by simple separation from the raw product, significantly reducing the energy used. Gangadwala et al [9] explored various reactive distillation configurations for the production of n-BuAc to eliminate dibutyl ether byproduct, but did not validate the model results experimentally. Jimenez and Costa-Lopez [10] used methyl acetate and n-butanol (n-BuOH) to produce n-BuAc and methanol; three columns were used to obtain high-purity n-BuAc and the reactive distillation column had 43 theoretical stages.…”

Section: Introductionmentioning

confidence: 95%

“…The equilibrium stage model has been successfully used for reactive distillation column simulation [20][21][22][23], so a rigorous equilibrium stage model containing the mass balance, phase equilibrium, summation, and energy balance equations is used to describe the multistage vapor-liquid separation in the reactive distillation. In the simulation, the universal quasi-chemical activity coefficient model is used for the n-BuAc system and the non-random twoliquid activity coefficient model is used for the EtAc system [9]. The Hayden-O'Connell second virial coefficient model with association parameters is used to account for the dimerization and trimerization of HAc in the vapor phase [24].…”

Section: Model Validationmentioning

confidence: 99%

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Optimization of coproduction of ethyl acetate and n-butyl acetate by reactive distillation

Tian

Zhao

Zheng

et al. 2015

Chinese Journal of Chemical Engineering

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Section: Introductionmentioning

confidence: 95%

Section: Model Validationmentioning

confidence: 99%

Optimization of coproduction of ethyl acetate and n-butyl acetate by reactive distillation

Tian

Zhao

Zheng

et al. 2015

Chinese Journal of Chemical Engineering

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“…The selection of the physical property was very important due to the highly nonideal nature of the quaternary system, and the phase equilibrium of EtAc and n-BuAc systems was complex because of the existence of the azeotropes. Because of the nonideal vapor−liquid equilibrium (VLE) and possible vapor−liquid− liquid equilibrium (VLLE) for the quaternary system, the UNIQUAC activity coefficient model for n-BuAc system and the NRTL activity coefficient model for EtAc system were adopted, 27 and the model equations and parameters came from the Aspen Plus database. The Hayden−O'Conell second virial coefficient model with association parameters was used to account for the dimerization and trimerization of HAc in the vapor phase.…”

Section: Modeling and Simulationmentioning

confidence: 99%

Novel Procedure for Coproduction of Ethyl Acetate and n-Butyl Acetate by Reactive Distillation

Tian

Zheng

Huang

et al. 2012

Ind. Eng. Chem. Res.

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A novel energy saving procedure for the coproduction of ethyl acetate and n-butyl acetate by reactive distillation is simulated by Aspen Plus in this paper. Its feasibility is theoretically analyzed on the basis of the physical properties of ethyl acetate/n-butyl acetate system. The new procedure not only significantly reduces energy consumption, but also eliminates the acetic acid purification column, as compared with the individual processes. The outputs of ethyl acetate and n-butyl acetate can be adjusted flexibly by changing the feed molar ratio of ethanol to n-butanol in a certain range. When the feed molar ratio is less than 1.0, the purity of the products is the same as that for those obtained from the individual procedures. Also, energy-saving increases as the feed molar ratio of ethanol to n-butanol decreases. When the feed molar ratio of ethanol to n-butanol is 0.5, 20.40% energy-saving is achieved, as compared with the individual procedures. At last, the total annual cost (TAC) of the individual and coproduction procedure is calculated, and the TAC of the coproduction is 3 795 912 USD/Y (U.S. dollars per year) less than the individual’s 5 190 921 USD/Y, when 10 000 t EtAc and 26 363 t n-BuAc are produced.

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“…The most common approach to separate acetic acid (if distillation is chosen to be the method) is to use an entrainer or solvent in an azeotropic distillation column to purify water contaminated with acetic acid. Another approach is to use a reactive distillation column [7]. Urea is separated from water to the target purity in two stages.…”

Section: Humidity Condensate Distillation Modelmentioning

confidence: 99%

Distillation Designs for the Lunar Surface

Boul

Lange

Conger

et al. 2010

40th International Conference on Environmental Systems

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Gravity-based distillation methods may be applied to the purification of wastewater on the lunar base. These solutions to water processing are robust physical separation techniques, which may be more advantageous than many other techniques for their simplicity in design and operation. The two techniques can be used in conjunction with each other to obtain high purity water. The components and feed compositions for modeling waste water streams are presented in conjunction with the Aspen property system for traditional stage distillation. While the individual components for each of the waste streams will vary naturally within certain bounds, an analog model for waste water processing is suggested based on typical concentration ranges for these components. Target purity levels for recycled water are determined for each individual component based on NASA's required maximum contaminant levels for potable water Optimum parameters such as reflux ratio, feed stage location, and processing rates are determined with respect to the power consumption of the process. Multistage distillation is evaluated for components in wastewater to determine the minimum number of stages necessary for each of 65 components in humidity condensate and urine wastewater mixed streams. Nomenclature

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Computer aided design of reactive distillation processes for the treatment of waste waters polluted with acetic acid

Cited by 7 publications

References 14 publications

Optimization of coproduction of ethyl acetate and n-butyl acetate by reactive distillation

Optimization of coproduction of ethyl acetate and n-butyl acetate by reactive distillation

Novel Procedure for Coproduction of Ethyl Acetate and n-Butyl Acetate by Reactive Distillation

Distillation Designs for the Lunar Surface

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