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Authors
Advisor(s)
Abstract(s)
Innovative methodologies, such as microwaveassisted
reaction, can help to valorize lignin with higher
productivity and better energy efficiency. In this work, microwave
heating was tested in the wet peroxide oxidation of three lignins
(Indulin AT, Lignol, and Eucalyptus globulus lignins) as a novel
methodology to obtain C4 dicarboxylic acids. The effect of
temperature, time, and catalyst type (TS-1 or Fe-TS1) was
evaluated in the production of these acids. The TS-1 catalyst
improved succinic acid yield, achieving up to 9.4 wt % for Lignol
lignin. Moreover, the microwave heating specifically enhanced
Lignol conversion to malic acid (34 wt %), even without catalyst,
showing to be an attractive path for the future valorization of
organosolv lignins. Overall, compared to conventional heating, microwave heating originated a rapid lignin conversion. Nevertheless,
for prolonged times, conventional heating led to better results for some target products, e.g., malic and succinic acids.
Description
Keywords
Acids Conversion Efficiency Eucalyptus Globulus
Pedagogical Context
Citation
Vega-Aguilar, Carlos A.; Costa, Carina; Barreiro, M.F.; Rodrigues, Alírio (2022). Industrial & Engineering Chemistry Research. ISSN 1520-5045. 61:10, p. 1-12
Publisher
ACS