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

Production of alginate-based aerogel particles using supercritical drying: Experiment, comprehensive mathematical model, and optimization

Full text
Author(s):
Hatami, Tahmasb [1, 2] ; Vigano, Juliane [1, 3] ; Innocentini Mei, Lucia Helena [2] ; Martinez, Julian [1]
Total Authors: 4
Affiliation:
[1] Univ Estadual Campinas, Sch Food Engn, Food Engn Dept, UNICAMP, R Monteiro Lobato 80, BR-13083862 Campinas, SP - Brazil
[2] Univ Estadual Campinas, Sch Chem Engn, Dept Mat Engn & Bioproc, UNICAMP, Av Albert Einstein 500, BR-13083852 Campinas, SP - Brazil
[3] Univ Fed Sao Paulo, Inst Environm Chem & Pharmaceut Sci, Dept Chem Engn, UNIFESP, R Sao Nicolau 210, BR-09913030 Diadema, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF SUPERCRITICAL FLUIDS; v. 160, JUN 1 2020.
Web of Science Citations: 0
Abstract

Alginate-based aerogel particles were produced by dripping alginate solution (2%, w/w) into CaCl2 solution (100 mM) followed by solvent exchange and supercritical drying (SCD). Hydrogel particles were first produced by the dripping method. Beads were separated from the CaCl2 cross-linking solution by filtration. Then, the solvent exchange was performed at room temperature by the immersion of the particles into ethanol/water mixtures. Next, the obtained alcogels were submitted to a SCD process at 12 MPa, 40 degrees C, and CO2 flow rate from 0.27 to 0.84 kg/h, and the recovered ethanol was gravimetrically measured. Finally, a comprehensive mathematical model was employed to describe the SCD process using the law of conservation of mass. The model, which resulted in two partial differential equations for the fluid and solid phases, was numerically solved using the finite difference method, successfully validated by the experimental data and employed in the sensitivity analysis and optimization. (C) 2020 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 18/18722-6 - Constructing a supercritical deposition-foaming unit for 3D supports (scaffold) fabrication: Experiment, mathematical modeling, and optimization
Grantee:Tahmasb Hatami
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/23670-2 - Biorefinery for the recovery of by-products from passion fruit processing through high pressure technologies
Grantee:Julian Martínez
Support Opportunities: Regular Research Grants
FAPESP's process: 11/06083-0 - Emulsification by microchannels
Grantee:Rosiane Lopes da Cunha
Support Opportunities: Regular Research Grants