Vapor-Liquid Equilibrium Calculation for Simulation of Bioethanol Concentration From Sugarcane

Matugi, Karina; Chiavone‐Filho, Osvaldo; Ribeiro, Marcelo Perencin de Arruda; Soares, Rafael de Pelegrini; Giordano, Roberto de Campos

doi:10.1590/0104-6632.20180352s20160278

Cited by 7 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The UNIFAC model (group contribution model) is very common in the chemical industry to estimate equilibrium, as well as the NRTL model (local composition model) are complex equations that fit well with actual mixtures such as those processed by industry of ethanol. It is due to this that commonly the literature uses the predictive models NRTL-HOC and UNIF-DMD for the modeling of fusel oil (POLING et al, 2000;SANZ;GMEHLING, 2008;FERREIRA et al, 2013;EUSTÁCIO et al, 2018;MATUGI et al, 2018;MACHADO et al, 2019).…”

Section: Binaries That Form Azeotropementioning

confidence: 99%

“…(6) Equation (6) consists of the modified Raoult's Law (in the gamma-phi approach) which considers the non-idealities in the liquid phase ( ), and in the vapor phase ), being the Equation (6) adopted by the literature as a typical modeling for distillation of the sugar and alcohol industry (BATISTA; MEIRELLES, 2011;EUSTÁCIO et al, 2018;MATUGI et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…For the vapor phase, the fugacity coefficient ( ) can be obtained by means of PVT equations to adequately describe the situation to be modeled. These equations can be Virial, Soave-Redlich-Kwong, among others (POLING et al, 2000;MEIRELLES, 2011;SMITH et al, 2011;FERREIRA et al, 2013;EUSTÁCIO et al, 2018;MATUGI et al, 2018). For the liquid phase, the activity coefficient ( ) depends on all the components of the mixture in question and can be calculated by the excess Gibbs energy (SMITH et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…In this kind of equation models are used to obtain the necessary parameters. These models may be locally composed (for example NRTL, UNIQUAC and WILSON) or from group contributions (for example UNIFAC) (POLING et al, 2000;MEIRELLES, 2011;SMITH et al, 2011;FERREIRA et al, 2013;EUSTÁCIO et al, 2018;MATUGI et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Liquid-Vapor Equilibrium Thermodynamics of the Fusel Oil: A Case Study

Corrêa¹,

Melo²,

Silva³

2019

Enci Bio

View full text Add to dashboard Cite

Fusel oil is a by-product of the process of recovering hydrated ethanol, consisting of a mixture of superior alcohols, ethanol, water, among other components. Its commercial interest is mainly due to the presence of isoamyl alcohol, one of the raw materials used in the synthesis of esters, which compounds are relevant for the chemical industry. The recovery of this superior alcohol involves unit operations based on phase equilibrium, which for multicomponent systems can be studied in software that simulates the operation of equipment, in order to present predictions of interactions between its components, reducing errors, time and costs of design. In the industrial, academic and scientific fields, there are numerous challenges regarding the design of separation processes and the monitoring of mixing effects in typical operations, and the Aspen Plus process simulation and optimization platform excels in solving these issues. The current study aims to predict the Liquid-Vapor Equilibrium of the fusel oil, which was considered as a mixture of five components, from the behavioral analysis of each of the binaries that compose it. Several models were investigated, observing the deviations of the ideality as well as the azeotrope formation. The most suitable model to describe the behavior of the studied mixture was determined with the aid of literature data for the Liquid-Vapor Equilibrium of the Isoamyl alcohol/Water binary. The results show that the Wilson modeling presented better adjustment to the experimental data, although modeling with modified Wilson also showed appreciable adjustments. TERMODINÂMICA DO EQUILÍBRIO LÍQUIDO-VAPOR DO ÓLEO FÚSEL: UM ESTUDO DE CASORESUMO O óleo fúsel é um subproduto do processo de recuperação de etanol hidratado, constituído por uma mistura de alcoóis superiores, etanol, água, dentre outros componentes. Seu interesse comercial se deve principalmente à presença do álcool isoamílico, uma das matérias-primas utilizadas na síntese de ésteres, compostos estes relevantes para a indústria química. A recuperação deste álcool superior envolve operações unitárias baseadas no equilíbrio de fases, que para sistemas multicomponentes pode ser estudada em softwares que simulam o funcionamento de equipamentos, de forma a apresentar previsões das interações entre os seus componentes, reduzindo erros, tempo e custos de projeto. No âmbito industrial, acadêmico e cientifico, existem inúmeros desafios acerca do dimensionamento de processos de separação e acompanhamento dos efeitos de mistura em operações típicas, e a plataforma de simulação e otimização de processos Aspen Plus se destaca na solução destas questões. O presente trabalho tem como objetivo prever o equilíbrio Líquido-Vapor do óleo fúsel, que foi considerado como uma mistura de cinco componentes, a partir da análise comportamental de cada um dos binários que o compõe. Foram investigadas modelagens diversas, observando os desvios da idealidade e também quanto à formação de azeótropos. O modelo mais adequado para descrever o comportamento da mi...

show abstract

Section: Binaries That Form Azeotropementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Liquid-Vapor Equilibrium Thermodynamics of the Fusel Oil: A Case Study

Corrêa¹,

Melo²,

Silva³

2019

Enci Bio

View full text Add to dashboard Cite

show abstract

“…The practical use of hydrated ethanol represents an essential factor for the reducing costs related to the energy consumed in the process (Venturini et al, 2018;Tura et al, 2018;Matugi et al, 2018;Robertson and Pavlath, 1985;Fagundez et al, 2017;Cataluña et al, 2017). The production of first and second-generation ethanol in the same industrial plant presents better financial results compared to the isolated processes (Silva et al, 2017;Caetano et al, 2015b;Dias et al, 2012;Ojeda et al, 2011;Seabra et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Energetic and Economic Analysis of Use of Hydrated Ethanol

Ruoso¹,

Lhamby²,

Missaggia³

et al. 2020

PTQ

View full text Add to dashboard Cite

Interest in biofuels is growing, and ethanol has been the most used biofuel as an additive and as a gasoline substitute and, it is considered a potential alternative to traditional fuels. Ethanol represents 17% of energy consumption in transportation in Brazil, the transport sector's share in the energy matrix is 32.4%, which is the second most energy-consuming sector. The production of first and second-generation ethanol in the same industrial plant presents better financial results compared to the isolated processes. Also, ethanol obtained from the sugarcane has renewability, biodegradability and provides CO2 emissions mitigation. The objective of the work is to perform an analysis of the ethanol with several levels of hydration in terms of energetic, economic, environmental and safety. The results showed that each 10% of water in ethanol dilution the temperature in the flame surround decreases by 4%. Besides, the ethanol with 20% of water dilution emits 20% less radiation compared to 10% of water dilution. Indeed, the energy consumed in the distillation to produce ethanol with 10% of water is double. On the other hand, this energy difference in the production of ethanol diluted with 30% of water is not enough to compensate for the losses in the energy use process. Also, large amounts of water in ethanol dilution might be unfeasible the use due to the total cost of transportation. Therefore, ethanol with 20% of water represents the more efficient, cleaner and safe fuel in free flame applications.

show abstract