Simple multicomponent batch distillation procedure with a variable reflux policy

Abstract

-This paper describes a shortcut procedure for batch distillation simulation with a variable reflux policy. The procedure starts from a shortcut method developed by Sundaram and Evans in 1993 and uses an iterative cycle to calculate the reflux ratio at each moment. The functional relationship between the concentrations at the bottom and the dome is evaluated using the Fenske equation and is complemented with the equations proposed by Underwood and Gilliland. The results of this procedure are consistent with those obtained using a fast method widely validated in the relevant literature.

Cyber-Physical LPG Debutanizer Distillation Columns: Machine-Learning-Based Soft Sensors for Product Quality Monitoring

“…The equations usually take into account the global balance of matter, partial balances of matter, pressure, temperature, flow, reflux policies, and the relationship between component concentrations at different levels of the distillation column [3,6]. Although additional information regarding the structure of the distillation column can further enhance such models (e.g., the number of trays in a column or the column hydraulics [7]) with the increasing computational complexity of such models.…”

“…Considering the laws, equations, and restrictions described above, we can derive a set of equations, which provide meaningful cues on the expected mixture composition, and thus drive better forecasts. e.g., from Equation ( 1) and approximating the LPG composition to the four elements described above, we obtain that C5 proportion can be expressed as Equation (7). Although pressure is known from the sensor readings (P1), we do not know the exact proportion of propane and butane.…”

Fractionation Process of Essential Oils by Batch Distillation

“…Batch vacuum distillation works at lower temperatures and offers flexibility to operate with different mixtures in the same industrial plant and also the possibility of operating with small volumes (Jimenez et al, 2002;Mujtaba, 2004). The quality of the distillate can be controlled through manipulation of the reflux ratio, which affects the dynamics of the process (Adari and Jana, 2008;Garcia et al, 2014;Reid et al, 1987). *Corresponding author.…”

Operational Design and Improvement of Conventional Batch Distillation and Middle-Vessel Batch Distillation

“…Conventional batch distillation can be operated in several modes, and the performance of the operation modes is different. Many researchers (Bai et al, 2007;García et al, 2014;Lopes and Song, 2010) have studied operation optimization and made contributions to the process. However, the column *E-mail: huagongyl@163.com cannot be used to separate components simultaneously when the mixtures contain more than two components.…”