Journal
ENERGY
Volume 114, Issue -, Pages 634-646Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2016.07.154
Keywords
Thermogravimetric analysis; Pyrolysis gas chromatography/mass spectroscopy; Wood pyrolysis; Copper; Potassium; Bio-fuel
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Funding
- National Natural Science Foundation of China [51406207]
- Youth Innovation Promotion Association CAS [2014320]
- scientific research and equipment development project by Chinese Academy of Sciences [YZ201516]
- Special Support Plan of Guangdong Province [2014TQ01Z379]
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Characterizing the pyrolysis of inorganic matter-rich biomass is important for the preparation of bio-fuel precursors. Here, thermogravimetric and pyrolysis gas chromatography/mass spectroscopy (Py-GC/MS) were employed to elucidate the specific pyrolysis mechanisms of demineralized wood dust (AWD) impregnated with varying amounts of the inorganic compounds, copper and potassium. During the pyrolysis process, there was a dramatic decomposition of hemicellulose (at 200-320 degrees C) and of cellulose (at 320-420 degrees C), along with slow lignin degradation. The decomposition of hemicellulose was substantially promoted with an increasing amount of copper. In addition, a decreased amount of aldehydes and phenols was observed, indicating a lower level of cellulose and lignin degradation, which led to more generation of bio-fuel precursors (C-5-C-16). In contrast to copper, potassium substantially promoted the decomposition of cellulose and lignin, but had negligible effect on hemicellulose. In the presence of both copper and potassium, the latter had a more dominant role causing an increased amount of small molecular compounds (C-2-C-4, i.e., from 10.91% to 22.12%), and decreased amounts of bio-fuel precursors (i.e., from 62.19% to 52.49%). The various decomposition pathways that might be involved in the catalytic pyrolysis of wood using copper and potassium are discussed. (C) 2016 Elsevier Ltd. All rights reserved.
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