Impact of Miscanthus x giganteus senescence times on fast pyrolysis bio-oil quality

Michal Mos, Simon Banks, daniel Nowakowski, Paul Russell Robson, Anthony Bridgwater, Iain Simon Donnison

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In this study the impact of senescence and harvest time in Miscanthus on the quality of fast pyrolysis liquid (bio-oil) was investigated. Bio-oil was produced using a 1 kg h−1 fast pyrolysis reactor to obtain a quantity of bio-oil comparable with existing industrial reactors. Bio-oil stability was measured using viscosity, water content, pH and heating value changes under specific conditions. Plant developmental characteristics were significantly different (P ⩽ 0.05) between all harvest points. The stage of crop senescence was correlated with nutrient remobilisation (N, P, K; r2 = 0.9043, r2 = 0.9920, r2 = 0.9977 respectively) and affected bio-oil quality. Harvest time and senescence impacted bio-oil quality and stability. For fast pyrolysis processing of Miscanthus, the harvest time of Miscanthus can be extended to cover a wider harvest window whilst still maintaining bio-oil quality but this may impact mineral depletion in, and long term sustainability of, the crop unless these minerals can be recycled.
Original languageEnglish
Pages (from-to)335-342
Number of pages8
JournalBioresource Technology
Early online date28 Nov 2012
Publication statusPublished - 01 Feb 2013


  • Bio-oil stability
  • Fast pyrolysis
  • Miscanthus x giganteus
  • Nitrogen remobilisation
  • Senescence


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