Divided wall distillation column: Dynamic modeling and control

Woinaroschy, Alexandru; Isopescu, Raluca

doi:10.1016/s1570-7946(08)80057-0

Cited by 2 publications

(5 citation statements)

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“…This technology can be generalized to mixtures with more than three components as to reactive, azeotropic or extractive distillations [36]. For promoting the reliable design methodologies for generalizations of DWC in industrial applications, or for maintaining the compromise between complexity and correctness, the mathematical calculations options available include differential equations systems, concerning total mass at plate j, mass balance for component i at plate j and dynamic calculation of temperature at plate j, resoluble by numerical methods [37].…”

Section: Techniques Of Glycerol Purificationmentioning

confidence: 99%

Upgrading the Glycerol from Biodiesel Production as a Source of Energy Carriers and Chemicals—A Technological Review for Three Chemical Pathways

Rodrigues

Bordado²,

Santos³

2017

Energies

120

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Abstract:Glycerol is a by-product of biodiesel obtained from biomass, accounting for 10% of the biodiesel production. In the context of a green economy, aiming for a reduction of the emission of atmospheric greenhouse gases emissions, the demand of biodiesel is expected to increase vastly, in parallel with a side glut supply of glycerol. Given the high cost of biodiesel compared with its fossil congener, upgrading of glycerol into added-value products can represent a secondary income source and turn the production of such alternative fuels economically sustainable in the long term. The glycerol obtained as by-product of biodiesel from biomass is in a crude form and must be purified. Some industrial solutions and applications were therein geared. The survey presented in this work, based on a reviewing of the existing literature, examines three routes for the valuing glycerol into energy carriers and chemicals, namely, carbonation, acylation, and steam reforming to hydrogen. The latter is embodied of great interest and importance, insofar that hydrogen by itself is considered as straighforward clean fuel for transportation uses, due to its high calorific power and to recent advances in fuel cells. We also have focused on the chain value from biomass to energies carriers through these pathways.

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Section: Techniques Of Glycerol Purificationmentioning

confidence: 99%

Upgrading the Glycerol from Biodiesel Production as a Source of Energy Carriers and Chemicals—A Technological Review for Three Chemical Pathways

Rodrigues

Bordado²,

Santos³

2017

Energies

120

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“…Recently, the minimization of startup time in a heat and mass integrated two columns system was analyzed by Verbanov et al, as a generalization of the two heat integrated−two pressure column system . An investigation on optimal startup control of DWC was briefly reported by Woinaroschy and Isopescu …”

Section: Startup Simulationmentioning

confidence: 99%

“…15 An investigation on optimal startup control of DWC was briefly reported by Woinaroschy and Isopescu. 16 A general sequence of actions, forming the basis for different startup procedures for sieve plate columns, was formulated by Ruiz et al 28 Step 0: The column is empty, and the liquid feed is introduced (only liquid feed is considered).…”

Section: Startup Simulationmentioning

confidence: 99%

“…The dynamic simulation of a distillation column has proved to be an efficient theoretical tool in providing startup policies. , The comparison with experimental studies concerning startup and transient regimes is also of crucial importance when operating conditions change and a new steady state must be reached. , …”

Section: Introductionmentioning

confidence: 99%

“…15 The dynamic simulation of a distillation column has proved to be an efficient theoretical tool in providing startup policies. 16,17 The comparison with experimental studies concerning startup and transient regimes is also of crucial importance when operating conditions change and a new steady state must be reached. 17,18 Commercial simulators, such as HYSYS or ASPEN, provide reliable environments for steady state and dynamic simulation of distillation columns, including conventional PID controllers.…”

Section: Introductionmentioning

confidence: 99%

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Time-Optimal Control of Dividing-Wall Distillation Columns

Woinaroschy¹,

Isopescu²

2010

Ind. Eng. Chem. Res.

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Time-optimal control of startup traditional distillation columns by iterative programming proposed by Woinaroschy for ideal [Ind. Eng. Chem. Res. 2008, 47, 4158] and nonideal mixtures [Ind. Eng. Chem. Res. 2009, 48, 3873] is extended to the case of dividing-wall distillation columns. The minimization of distillation startup time is performed by iterative dynamic programming employing randomly chosen candidates for admissible control. The control variables are the reflux ratio, the reboiler heat duty, and the side-draw flow rate. The dynamic distillation model proposed by the author in the previous papers is applied. Two illustrative case studies for the separation in a dividing-wall column with sieve trays and lateral downcomers are presented as follows: the separation of an ideal benzene−toluene−ethylbenzene ternary mixture and the separation of a nonideal methanol−ethanol−1-propanol mixture. In another case study, a conventional two-column system is presented in comparison to the dividing-wall column. As in the cases of traditional distillation columns, the startup time decrease and the corresponding reboiler energy savings are significant for each of the control variables.

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Divided wall distillation column: Dynamic modeling and control

Cited by 2 publications

References 10 publications

Upgrading the Glycerol from Biodiesel Production as a Source of Energy Carriers and Chemicals—A Technological Review for Three Chemical Pathways

Upgrading the Glycerol from Biodiesel Production as a Source of Energy Carriers and Chemicals—A Technological Review for Three Chemical Pathways

Time-Optimal Control of Dividing-Wall Distillation Columns

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