VAPOR-LIQUID EQUILIBRIUM CALCULATION FOR SIMULATION OF BIOETHANOL CONCENTRATION FROM SUGARCANE

被引:7
|
作者
Matugi, Karina [1 ]
Chiavone-Filho, Osvaldo [2 ]
de Arruda Ribeiro, Marcelo Perencin [1 ]
Soares, Rafael de Pelegrini [3 ]
Giordano, Roberto de Campos [1 ]
机构
[1] Univ Fed Sao Carlos, Programa Posgrad Engn Quim, Rodovia Washington Luiz,Km 235 S-N, BR-13565905 Sao Carlos, SP, Brazil
[2] Univ Fed Rio Grande do Norte, Dept Engn Quim, Av Senador Salgado Filho S-N, BR-59066800 Natal, RN, Brazil
[3] Univ Fed Rio Grande do Sul, Escola Engn, Dept Engn Quim, Rua Engenheiro Luis Englert S-N, BR-90040040 Porto Alegre, RS, Brazil
关键词
vapor-liquid equilibrium in ethanol production; vapor pressure; Poynting factor; fugacity coefficient; F-SAC; MODIFIED UNIFAC MODEL; BINARY-MIXTURES; DISTILLATION; ETHANOL; PREDICTION; DEHYDRATION; ENTRAINER; PRESSURE; SYSTEMS; SOLVENT;
D O I
10.1590/0104-6632.20180352s20160278
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The robustness of the simulation of bioethanol concentration from sugarcane faces two major challenges: the presence of several minor components and the nonlinear behavior of vapor-liquid equilibrium (VLE) calculations. This work assesses the effect of simplifications to overcome these difficulties. From a set of seventeen substances, methanol, n-propanol, isobutanol, 2-methyl-1-butanol and 3-methyl-1-butanol were selected through the examination of the influence of each minor component on vapor-liquid equilibrium calculations of ethanol-water-third component systems. The selection procedure was based on Txy diagrams built using the modified Raoult's law. The influence of the ratio between the vapor phase fugacity coefficients and of the Poynting correction factor were verified. The accuracy of four correlations for vapor pressure was evaluated, and two functional-group activity coefficient models were scrutinized: the recent Functional-Segment Activity Coefficient (F-SAC) and the UNIFAC-Do model.
引用
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页码:341 / 352
页数:12
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