The influence of harvest and storage on the properties of and fast pyrolysis products from Miscanthus x giganteus |
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| Affiliation: | 1. Aston University Bioenergy Research Group, Birmingham B4 7ET, United Kingdom;2. Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, United Kingdom;1. University of Hohenheim, Yeast Genetic and Fermentation Technology (150f), Garbenstraße 23, 70599 Stuttgart, Germany;2. University of Hohenheim, Biobased Products and Energy Crops (340b), Fruwirthstraße 23, 70599 Stuttgart, Germany;1. Department of Mathematics, Finance University under the Government of Russian Federation, Leningradsky Prospect 49-55, 125468 Moscow, Russian Federation;2. Department of Algebra and Geometry, Palacky University, 17. listopadu 12, 77146 Olomouc, Czech Republic;1. Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan, PR China;2. Synfuels China Co. Ltd., Taiyuan 030032, PR China;1. Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan;2. Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 701, Taiwan;3. Université de Lorraine, Inra, LERMaB, F88000 Epinal, France;4. Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan;5. Department of Chemical and Biological Engineering, University of British Columbia, Vancouver V6T 1Z3, Canada |
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| Abstract: | The research investigates the fuel property variations associated with the time of harvest and the duration of storage of Miscanthus x giganteus over a one year period. The crop has been harvested at three different times: early (September 2009), conventional (April 2010) and late (June 2010). Once harvested the crop was baled and stored. Biomass properties of samples taken from different storage zones were compared. The thermochemical properties have been investigated using a range of analytical equipment including thermogravimetric analysis (TGA) and pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS). In addition, bio-oil has been produced from the early, conventional and late harvest using a laboratory scale (300 g h−1) fast pyrolysis unit. The potential organic liquid yield (on dry basis, also excluding the reaction water generated) based on the laboratory fast pyrolysis processing undertaken in this study, was found to vary between 2.82 and 3.18 dry t ha−1 for the early and the late harvest respectively. The bio-oil organic yield was reduced by approximately 11% (0.36 t ha−1) between the early and the late harvest. Char yield was also reduced by approximately 18% (0.61 t ha−1). The highest gas yield (18.03%-1.60 t ha−1) was observed for the conventional harvest. Gas chromatography-mass spectrometry (GC-MS) analysis of the bio-oil shows that levoglucosan, methylbenzaldehyde and 1,2-benzenediol all increase as a consequence of delayed harvest. It was also observed that by delaying the harvest time the O:C atomic ratio is reduced and a more carbonaceous feedstock is produced. |
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| Keywords: | Biomass storage TGA Py-GC-MS Fast pyrolysis |
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