Effect of moisture on enzymatic reaction in supercritical carbon dioxide View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2002-03

AUTHORS

M. Hakoda, N. Shiragami, A. Enomoto, K. Nakamura

ABSTRACT

The continuous acidolysis of triolein and stearic acid was carried out by an immobilized lipase to elucidate the characteristics of supercritical carbon dioxide (SC-CO2) as a reaction medium. At first, an effect of temperature and pressure on the water adsorption to the immobilized lipase in the SC-CO2 was examined. Then, the continuous interesterification of triolein and stearic acid by the moist immobilized lipase was examined. The amount of water adsorption to the immobilized lipase in the supercritical carbon dioxide measured under the condition of a different temperature and pressure has been expressed by a correlation equation of Freundlich type by using relative water standardized with the solubility of water in each condition. Optimum operating conditions of the interesterification by immobilized lipase in the SC-CO2 was 323 K, 16.9 MPa and adsorbed-water concentration of 2 wt%. The production rate obtained by enzymatic acidolysis in the SC-CO2 was found to be about 0.03 mmol/h×g-immobilized enzyme, leaving 74% residual triglyceride at the optimum operating conditions. More... »

PAGES

355-361

Journal

TITLE

Bioprocess and Biosystems Engineering

ISSUE

6

VOLUME

24

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s004490100245

DOI

http://dx.doi.org/10.1007/s004490100245

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1047293182


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