Distillation with parallel streams applied to biorefinery mixtures. (2017)
- Authors:
- Autor USP: BATISTA, FABIO RODOLFO MIGUEL - EEL
- Unidade: EEL
- Sigla do Departamento: LOQ
- Assunto: DESTILAÇÃO
- Keywords: Bioetanol; Distillation; Exergy
- Language: Inglês
- Abstract: Separation of low volatility and thermolabile mixtures by distillation requires the use of high reflux ratios, vacuum, and high number of trays. Mixtures of importance for biorefineries, such as potable bioethanol and biodiesel, are included in this case. These problems can be solved using distillation with parallel streams, such as para- and metastillation. In parastillation, the vapor flow is divided into two or more ascending flows that contact alternately with one descendent liquid flow, making possible the allocation of a larger number of trays per column height, with a smaller total pressure loss. In the case of metastillation, the division occurs in the liquid flow into one or more descendent streams that alternately contact with the total vapor stream, an advantage for high liquid loads. In this study, simplified calculation methodologies were developed and exergy analysis were implemented in order to highlight the potential advantages of distillation with parallel streams. A McCabe-Thiele-like procedure was developed for the calculation of para- and metastillation columns with any integer number of divisions of the corresponding stream. The thermal analyses were conducted via the exergy balance applied to the whole column and to each stage. The last one provides the exergy loss profile, which can be used as a basis for column optimizations and highlights the increase of the thermal efficiency of new configurations. It can be concluded that: i) the minimum number of trays increases with the number of phase divisions, while the minimum reflux ratio is the same for the different process; ii) in the case of parastillation,a smaller column height can be used to obtain the same separation, or by maintaining the height of the equipment, it allows the decrease of the reflux ratio; iii) the exergy loss profiles are different, according to the process type, being the parastillation the best alternative from a thermal point of view.
- Imprenta:
- Publisher: FAPESP
- Publisher place: Campos do Jordão
- Date published: 2017
- Source:
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ABNT
BIASI, Lilian Caroline Kramer et al. Distillation with parallel streams applied to biorefinery mixtures. 2017, Anais.. Campos do Jordão: FAPESP, 2017. . Acesso em: 27 fev. 2026. -
APA
Biasi, L. C. K., Batista, F. R. M., Batista, E. A. C., Zemp, R. J., & Meirelles, A. J. de A. (2017). Distillation with parallel streams applied to biorefinery mixtures. In Anais do Brazilian BioEnergy Science and Technology Conference, 2017. Campos do Jordão: FAPESP. -
NLM
Biasi LCK, Batista FRM, Batista EAC, Zemp RJ, Meirelles AJ de A. Distillation with parallel streams applied to biorefinery mixtures. Anais do Brazilian BioEnergy Science and Technology Conference, 2017. 2017 ;[citado 2026 fev. 27 ] -
Vancouver
Biasi LCK, Batista FRM, Batista EAC, Zemp RJ, Meirelles AJ de A. Distillation with parallel streams applied to biorefinery mixtures. Anais do Brazilian BioEnergy Science and Technology Conference, 2017. 2017 ;[citado 2026 fev. 27 ] - A simplified and general approach to distillation with parallel streams: the cases of para- and metastillation
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