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Monascus kaoliang CBS 302.78 immobilized in tailor-made agars as catalyst for reduction of ketones: On the quest for a green biocatalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
35312 45086 2008 7 PDF Available
Title
Monascus kaoliang CBS 302.78 immobilized in tailor-made agars as catalyst for reduction of ketones: On the quest for a green biocatalyst
Abstract

After a hierarchical screening Monascus kaoliang CBS 302.78 was selected due to its high activity in the reduction of cyclic ketones. Several tailor made agars and agaroses were used in the immobilization of the fungus. The best-immobilized biocatalyst was obtained after immobilization in low methoxylated agar (A27/03) at 2.5% (w/v). The biocatalyst shape was optimized as microplates (1.27 cm × 1.27 cm × 0.31 cm). The observable modulus for external mass transfer, Ω ⋘ 1, indicates the absence of external mass transfer phenomena. The internal effectiveness factor η < 1 and the high value of the Thiele module (ϕ > 3), indicates that there is an intra-particle mass transfer restriction according to the Weisz criteria. As consequence, the kinetics of the reduction of ketones follows a formal first order kinetic model. The catalysts deactivation follows a simple exponential decay expression. Due to the renewal characteristics of the agar, the biocatalysts can be considered as green catalysts.

Keywords
Monascus kaoliang; Biocatalysis; Immobilization in agar; Reduction of ketones; Mass transfer kinetics
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Monascus kaoliang CBS 302.78 immobilized in tailor-made agars as catalyst for reduction of ketones: On the quest for a green biocatalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 43, Issue 11, November 2008, Pages 1220–1226
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us