An approximate method of calculating the basic parameters of a multicomponent fractionation

Molokanov, Yu. K.; Korablina, T. P.; Mazurina, N. I.; Никифоров, Г. А.

doi:10.1007/bf00718702

Cited by 14 publications

(13 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this paper we use the shortcut method by Underwood [82], Fenske [83] , Gilliland [84] with the explicit equation by Molokanov [85] and Krikbride [86] for feed tray location (FUG), implemented in Matlab TM [87] and connected to Aspen-Hysys TM through the activeX capabilities in order to get accurate physical properties for calculating the volatilities and rigorous enthalpies to determine, if necessary the heat loads in reboilers and condensers.…”

Section: Is Selected False Otherwisementioning

confidence: 99%

Optimal synthesis of thermally coupled distillation sequences using a novel MILP approach

Caballero

Grossmann

2014

Computers & Chemical Engineering

View full text Add to dashboard Cite

This paper introduces a novel MILP approach for the design of distillation columns sequences of zeotropic mixtures explicitly including from conventional to fully thermally coupled sequences and divided wall columns with a single wall.The model is based on the use of two superstructure levels. In the upper level a superstructure that includes all the basic sequences of separation tasks and all the possibilities of heat exchange (condensers and reboilers). In the lower level an extended tree that explicitly includes all the alternatives for a given separation task (different thermal states and compositions of the feed to a given separation task). In that way, it is possible to a priori optimize all the possible separation tasks involved in the superstructure. A set of logical relationships relates the feasible sequences (upper level) with the optimized tasks in the extended tree resulting in a MILP to select the optimal sequence. Performance of the model in terms of robustness and computational time is illustrated with several examples.

show abstract

Section: Is Selected False Otherwisementioning

confidence: 99%

Optimal synthesis of thermally coupled distillation sequences using a novel MILP approach

Caballero

Grossmann

2014

Computers & Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…Gilliland in 1940 [7] presented his results about the relationship between the number of minimum stages and the number of theoretical stages with minimum reflux ratio and operational reflux ratio in graphical form. In 1972, Gilliland's results were correlated by Molokanov et al [13] and in 1975 by Eduljee [14] with the simpler expression of (g) in Table 2. The book Table 3 shows the values obtained for the four components in the three separations.…”

Section: Previous Work and Model Descriptionmentioning

confidence: 85%

Design of Batch Distillation Columns Using Short-Cut Method at Constant Reflux

Narváez-García

Loría

Vilchis-Bravo

et al. 2013

Journal of Engineering

View full text Add to dashboard Cite

A short-cut method for batch distillation columns working at constant reflux was applied to solve a problem of four components that needed to be separated and purified to a mole fraction of 0.97 or better. Distillation columns with 10, 20, 30, 40, and 50 theoretical stages were used; reflux ratio was varied between 2 and 20. Three quality indexes were used and compared: Luyben's capacity factor, total annual cost, and annual profit. The best combinations of theoretical stages and reflux ratio were obtained for each method. It was found that the best combinations always required reflux ratios close to the minimum. Overall, annual profit was the best quality index, while the best combination was a distillation column with 30 stages, and reflux ratio's of 2.0 for separation of benzene (i), 5.0 for the separation of toluene (ii), and 20 for the separation of ethylbenzene (iii) and purification of o-xylene (iv).

show abstract

“…The estimation of the actual number of stages required at a finite reflux was performed using the Gilliland correlation in the form of the modified Molokanov et al (1971)…”

Section: Calculation Equations and Methodologymentioning

confidence: 99%

Recovery of mono-ethylene glycol by distillation and the impact of dissolved salts evaluated through simulation of field data

Zaboon

Soames

Ghodkay

et al. 2017

Journal of Natural Gas Science and Engineering

View full text Add to dashboard Cite

This study was conducted to investigate the operation of a packed distillation column and analyse its performance during the separation of mono-ethylene glycol from water. The column was designed and constructed by the Curtin Corrosion Engineering Industry Centre (CCEIC) and operated in collaboration with a reputable oil company to generate experimental field data. A secondary investigation was then performed into the impacts of dissolved salts within the rich MEG feed upon the purity of the lean MEG product. It was observed through application of the FUG shortcut distillation design equations that six equilibrium stages were required to attain the experimental separations reported under continuous operation of the column. It was further determined that the packing utilised within the column had a Height Equivalent to a Theoretical Plate (HETP) of approximately 0.34 metres when no dissolved salts were present corresponding to an estimated packing height of approximately 1.7 metres. The impact of dissolved salts upon the performance of the column was evident through lower lean MEG purities observed during experimental operation of the column in comparison to salt free trials. The reduction in column performance was reaffirmed by Aspen HYSYS and Aspen Plus simulations of the field data, where salt trials resulted in lean MEG purities noticeably less than corresponding salt free experimental trials and simulated predictions. Overall, it was observed that the presence of dissolved salts during operation led to a reduction in MEG mass fraction of the final lean MEG product by on average 7.2%. The impact of dissolved salts on lean MEG purity was successfully predicted by Aspen Plus simulation with an average accuracy of 1.61% through the inclusion of monovalent salt cations using the ELECNRTL equation of state with modified binary parameters. The reduction in lean MEG purity was attributed to boiling point elevation of the MEG-Water solution and the impact of the dissolved salts on the systems vapour liquid equilibrium.

show abstract

An approximate method of calculating the basic parameters of a multicomponent fractionation

Cited by 14 publications

References 4 publications

Optimal synthesis of thermally coupled distillation sequences using a novel MILP approach

Optimal synthesis of thermally coupled distillation sequences using a novel MILP approach

Design of Batch Distillation Columns Using Short-Cut Method at Constant Reflux

Recovery of mono-ethylene glycol by distillation and the impact of dissolved salts evaluated through simulation of field data

Contact Info

Product

Resources

About