| Full text | |
| Author(s): |
Astolfi-Filho, Zailer
[1, 2]
;
Nicoletti Telis, Vania Regina
[1]
;
de Oliveira, Eduardo Basilio
[3]
;
dos Reis Coimbra, Jane Selia
[3]
;
Telis-Romero, Javier
[1]
Total Authors: 5
|
| Affiliation: | [1] UNESP, Dept Tecnol & Engn Alimentos, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
[2] COSAN SA Ind & Comercio, Unidade Taruma, BR-19820000 Tarumao, SP - Brazil
[3] Univ Fed Vicosa, Dept Tecnol Alimentos, BR-36571000 Vicosa, MG - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Biochemical Engineering Journal; v. 53, n. 3, p. 260-265, FEB 15 2011. |
| Web of Science Citations: | 16 |
| Abstract | |
The sugarcane juice is a relatively low-cost agricultural resource, abundant in South Asia, Central America and Brazil, with vast applications in producing ethanol biofuel. In that way, a good knowledge of the rheological properties of this raw material is of crucial importance when designing and optimizing unit operations involved in its processing. In this work, the rheological behavior of untreated (USCJ 7.9 degrees Brix), clarified (CSCJ, 18.2 degrees Brix) and mixed (MSCJ, 18.0 degrees Brix) sugarcane juices was studied at the temperature range from 277 K to 373 K, using a cone-and-plate viscometer. These fluids were found to present a Newtonian behavior and their flow curves were well-fitted by the viscosity Newtonian model. Viscosity values lied within the range 5.0 x 10(-3) Pa s to 0.04 x 10(-3) Pa s in the considered temperature interval. The dependence of the viscosity on the temperature was also successfully modeled through an Arrhenius-type equation. In addition to the dynamic viscosity, experimental values of pressure loss in tube flow were used to calculate friction factors. The good agreement between predicted and measured values confirmed the reliability of the proposed equations for describing the flow behavior of the clarified and untreated sugarcane juices. (c) 2010 Elsevier B.V. All rights reserved. (AU) | |