Membrane Fractionation of Liquors from Lignin-First Biorefining

Zafar Sultan, Inês Graça, Yueqin Li, Sérgio Lima, Ludmila G. Peeva, Daeok Kim, Mahmood A. Ebrahim, Roberto Rinaldi*, Andrew G. Livingston

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

For the utilization of each lignin fraction in the lignin liquors, the development of separation strategies to fractionate the lignin streams by molecular weight ranges constitutes a timely challenge to be tackled. Herein, membrane filtration was applied to the refining of lignin streams obtained from a lignin-first biorefining process based on H-transfer reactions catalyzed by Raney Ni, by using 2-PrOH as a part of the lignin extraction liquor and as an H-donor. A two-stage membrane cascade was considered to separate and concentrate the monophenol-rich fraction from the liquor. Building on the results, an economic evaluation of the potential of membrane filtration for the refining of lignin streams was undertaken. In this proof-of-concept report, a detailed analysis is presented of future developments in the performance required for the utilization of membrane filtration for lignin refining and, more aspiringly, solvent reclamation.

Original languageEnglish
Pages (from-to)1203-1212
Number of pages10
JournalChemSusChem
Volume12
Issue number6
Early online date25 Feb 2019
DOIs
Publication statusPublished - 21 Mar 2019

Keywords

  • economic evaluation
  • H-transfer reactions
  • lignin-first biorefining
  • membrane fractionation
  • Raney Ni

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