Biocatalytic designs for the conversion of renewable glycerol into glycerol carbonate as a value-added product

• Authors: Madalina Tudorache , George Ghemes , Andreea Nae , Elena Matei , Ionel Mercioniu , Erhard Kemnitz , Benjamin Ritter , Simona Coman , Vasile Parvulescu
• Languages of publication: EN

Abstracts

EN

A comparative study of two different biocatalytic models, e.g. enzyme immobilized on magnetic particles (EIMP) and cross-linking enzyme aggregates onto magnetic particles (CLEMPA) was performed. The first model was designed as enzyme-immobilized on the magnetic particles surface (EIMP). The second model was constructed as a network structure with the enzyme aggregates and magnetic particles placed into the nodes and polyglutaraldehyde cross-linker as the network ledges. The design was called cross-linking enzyme aggregates onto magnetic particles (CLEMPA). The biocatalysts were prepared using lipase enzyme from Aspergillus niger for catalyzing the glycerol (Gly) conversion to glycerol carbonate (GlyC). The biocatalyst characteristics for both designs (EIMP and CLEMPA) were evaluated using scanning electron microscopy (SEM), laser light scattering (LLS) and UV-Vis techniques. The EIMP model was strongly influenced by the composition of the polymeric layer covering the particles surface, while the size of the magnetic particles affected mostly the CLEMPA design. Also, the biocatalytic capacity of the tested models was evaluated as maximum 52% Gly conversion with 90% GlyC selectivity for EIMP, and 73% Gly conversion with 77% GlyC selectivity for CLEMPA. Both biocatalytic models were successfully used to prepare GlyC from “crude” glycerol collected directly from the biodiesel process (e.g. 49% Gly conversion with 91% GlyC selectivity for EIMP and 70% Gly conversion with 80% GlyC selectivity for CLEMPA).

Keywords

EN

Biocatalysis; Immobilized lipase; Glycerol and glycerol carbonate

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2014
• Volume: 12
• Issue: 12
• Pages: 1262-1270

Dates

published

1 - 12 - 2014

online

7 - 6 - 2014

Contributors

author

Madalina Tudorache

• University of Bucharest

author

George Ghemes

• University of Bucharest

author

Andreea Nae

• University of Bucharest

author

Elena Matei

• National Institute of Materials Physics

author

Ionel Mercioniu

• National Institute of Materials Physics

author

Erhard Kemnitz

• Department of Chemistry Humboldt-Universität zu Berlin

author

Benjamin Ritter

• Department of Chemistry Humboldt-Universität zu Berlin

author

Simona Coman

• University of Bucharest

author

Vasile Parvulescu

• University of Bucharest

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Identifiers

DOI

10.2478/s11532-014-0547-x