Seasonal variation in the chemical composition of the bioenergy feedstock Laminaria digitata for thermochemical conversion.

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Type Article
Original languageEnglish
Pages (from-to)226-234
Number of pages9
JournalBioresource Technology
Volume102
Issue number1
Early online date10 Jul 2010
DOI
Publication statusPublished - Jan 2011
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Abstract

To avoid negative impacts on food production, novel non-food biofuel feedstocks need to be identified and utilised. One option is to utilise marine biomass, notably fast-growing, large marine ‘plants’ such as the macroalgal kelps. This paper reports on the changing composition of Laminaria digitata throughout it growth cycle as determined by new technologies. The potential of Laminaria sp. as a feedstock for biofuel production and future biorefining possibilities was assessed through proximate and ultimate analysis, initial pyrolysis rates using thermo-gravimetric analysis (TGA), metals content and pyrolysis gas chromatography–mass spectrometry. Samples harvested in March contained the lowest proportion of carbohydrate and the highest ash and alkali metal content, whereas samples harvested in July contained the highest proportions of carbohydrate, lowest alkali metals and ash content. July was therefore considered the most suitable month for harvesting kelp biomass for thermochemical conversion to biofuels. Keywords: Algae; Bio-oil; Biorefinery; Py–GC–MS; TGA

Keywords

  • bio-oil, TGA, biorefinary, Py-GC-MS, algae