Modelling O2 and CO2 exchange for development of perforation-mediated modified atmosphere packaging

Autor: Jeffrey K. Brecht, Khe V. Chau, Isabel B.M Lino, Fernanda A. R. Oliveira, Susana C. Fonseca
Rok vydání: 2000
Předmět:
Zdroj: Journal of Food Engineering. 43:9-15
ISSN: 0260-8774
DOI: 10.1016/s0260-8774(99)00122-3
Popis: Perforation-mediated modified atmosphere packaging relies on the use of macro perforations or tubes to control the O2 and CO2 exchange and create the desired atmosphere inside an otherwise gas-tight package. In this work, the O2 and CO2 exchange through a single tube was studied. DiAerent temperatures (5‐20∞C) and tube dimensions (length from 9 to 17 mm and diameter from 6 to 30 mm) were tested. O2 and CO2 mass transfer coeAcients were determined according to a lumped mass transfer capacitance model that yielded a good description of the gas transfer. Temperature in the range tested did not show a significant eAect on the mass transfer coeAcients. A multiplicative non-linear equation was found to yield a good prediction of the dependence of the O2 mass transfer coeAcient on tube diameter and length. The ratio between the CO2 and O2 mass transfer coeAcients, an important parameter in the design of MAP, was 0.81 and none of the factors tested influenced its value. ” 2000 Elsevier Science Ltd. All rights reserved.
Databáze: OpenAIRE
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