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Pilot Scale Electrolysis of Peroxodicarbonate as an Oxidizer for Lignin Valorization

Abstract

A pilot scale plant at Technology Readiness Level (TRL) 6 comprising an electrochemical ex-cell continuous production of sodium peroxodicarbonate and a thermal depolymerization plug flow reactor for kraft lignin conversion is established. Due to the labile nature of the “green” oxidizer peroxodicarbonate, special attention must be paid to the production parameters in order to optimize its use. A simplified design model describing steady-state and transient operations is formulated and finally validated against experimental data from the electrolysis setup. Design trade-offs are visualized, and their impact on specific energy consumption is evaluated. The pilot plant was operated for a 20-month period for more than 1200 h on-stream. Optimized process conditions result in vanillin yields of 8 wt % and thus prove the successful scale-up.
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Category

Academic article

Language

English

Author(s)

Affiliation

  • SINTEF Industry / Process Technology
  • Germany
  • Karlsruhe Institute of Technology
  • Max Planck Society
  • Max Planck Institute for Chemical Energy Conversion

Year

2024

Published in

ACS Sustainable Chemistry and Engineering

Volume

12

Issue

30

Page(s)

11283 - 11296

View this publication at Norwegian Research Information Repository