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Experimental studies on the pyrolysis of humins from the acid-catalysed dehydration of C6-sugars

Authors
Journal
Journal of Analytical and Applied Pyrolysis
0165-2370
Publisher
Elsevier
Volume
104
Identifiers
DOI: 10.1016/j.jaap.2013.07.003
Keywords
  • Pyrolysis
  • Humins
  • Hydrothermal Carbonisation
  • Hydrochars
  • Bio-Based Chemicals

Abstract

Abstract Pyrolysis of two representative solid humin samples using pyrolysis GC–MS (300–600°C, 10s, He atmosphere) and micro-pyrolysis (500°C, 12s, N2 atmosphere) are reported. The humins were obtained by treatment of aqueous solutions of d-glucose and d-fructose at 180°C in the presence of sulphuric acid (0.1M) and isolated as brown solids in 20–30% yield. The products were characterised with various techniques (SEM, elemental analysis, solid state CP-NMR, FTIR). Pyrolysis GC–MS showed the presence of furanics and organic acids, though the individual components were present in minor amounts (<1wt%). Micro-pyrolysis yielded 30wt% gaseous and liquid products, the remainder being a solid char. Gas–liquid yields are lower than obtained for a typical lignin sample (kraft lignin) under similar conditions.

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