Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Determination of acoustic fields in acidic suspensions of peanut shell during pretreatment with high-intensity ultrasound

Full text
Polachini, T. C. [1] ; de Carvalho, G. R. [1] ; Telis-Romero, J. [1]
Total Authors: 3
[1] State Univ Sao Paulo UNESP, Food Engn & Technol Dept, Inst Biosci Humanities & Exact Sci IBILCE, Campus Sao Jose Do Rio Preto, BR-15054000 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Brazilian Journal of Chemical Engineering; v. 34, n. 2, p. 385-394, APR-JUN 2017.
Web of Science Citations: 2

Abstract The benefits of high-intensity ultrasound in diverse processes have stimulated many studies based on biomass pretreatment. In order to improve processes involving ultrasound, a calorimetric method has been widely used to measure the real power absorbed by the material as well as the cavitation effects. Peanut shells, a byproduct of peanut processing, were immersed in acidified aqueous solutions and submitted to an ultrasonic field. Acoustic power absorbed, acoustic intensity and power yield were obtained through specific heat determination and experimental data were modeled in different conditions. Specific heat values ranged from 3537.0 to 4190.6 J·kg-1·K-1, with lower values encountered for more concentrated biomass suspensions. The acoustic power transmitted and acoustic intensity varied linearly with the applied power and quadratically with solids concentration, reaching maximum values at higher applied nominal power and for less concentrated suspensions. A power yield of 82.7% was reached for dilute suspensions at 320 W, while 6.4% efficiency was observed for a concentrated suspension at low input energy (80 W). (AU)

FAPESP's process: 13/09344-4 - Determination of the best physical conditions of hydrolysis with power ultrasound in peanuts waste
Grantee:Tiago Carregari Polachini
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 13/17497-5 - Determination of the best conditions of physical hydrolysis by power ultrasound in agroindustrial wastes
Grantee:Javier Telis Romero
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants