Falling film distillation column with heat transfer by means of a vapor chamber. Part II: operation with a temperature profile

Marangoni, Cintia; Peruzzo, Tiago; Parisotto, Iaçanã G. B.; Ricardo, Valdete W.; Claumann, Carlos Alberto; Milanez, Kenia W.; Mantelli, Marcia; Quadri, Marintho Bastos; Bolzan, Ariovaldo; Santos, Mauricio Cougo dos; Medina, L.C.; Machado, Ricardo Antônio Francisco

doi:10.1080/00986445.2018.1542255

Cited by 14 publications

(2 citation statements)

References 12 publications

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“…In both cases, the results demonstrated that the lower values of the variables tested provided the most substantial increases in the mass fraction, thus indicating the behavior of the falling film unit in the separation of multicomponent mixtures. These results have similarities with the previous works of the research group with different mixtures (Silva Filho et al, 2018;Marangoni et al, 2018;. However, when the multicomponent and the binary systems previously studied are compared, it can be observed that each mixture has different optimal conditions (qualitatively), thus indicating that hydrodynamic aspects influenced by the mixture properties (such as viscosity) determine the performance of the process.…”

Section: Experimental Testssupporting

confidence: 88%

“…This technology has been associated with molecular or short path distillation (carried out with vacuum) and more recently to the reduction of energy consumption and tower height (Saifutdinov et al, 2002). Regarding this, Silva Filho et al 2018, Marangoni et al (2018) and showed that a falling film device is also practical at atmospheric pressure for mixtures such as aromatics and ethanol/water. Also, the authors established a new configuration for heat supply, which provides energetic advantages in this kind of distillation.…”

Section: Introductionmentioning

confidence: 99%

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Energy and Exergetic Evaluation of the Multicomponent Separation of Petrochemical Naphtha in Falling Film Distillation Columns

Querino

Machado

Marangoni

2019

Braz. J. Chem. Eng.

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Multicomponent separation of synthetic petrochemical naphtha (hexane, cyclohexane, toluene and xylene) was carried out in a falling film distillation sequence with heat supply using a vapor chamber (thermosyphon). Tests were carried out by varying feed flow rate and temperatures of the feed and the vapor chamber in two ways of heat supply: isothermal and with a vapor chamber temperature profile. Regarding the distillation behavior of the multicomponent separation with the proposed falling film column, it was verified that the lower values of the studied variables and the profile temperature mode promoted the best results for hexane recuperation. With an indirect sequence of three columns, hexane mass fraction in the top column increases to the value of 0.82. Higher thermodynamic efficiency was found for two columns of the sequence in comparison with the conventional ones. This behavior is related to smaller energy consumption, showing a total energy reduction of 12% compared to the same separation performed in a conventional unit. Energy and exergetic efficiency values were higher than 95% and 85% in the three columns used. These analyses demonstrated that the falling film separation proposal is an energy efficient arrangement and could be considered for multicomponent separation.

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Section: Experimental Testssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%