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Characterization of Bio-oil and Bio-char from Pyrolysis of Palm Oil Wastes

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Abstract

The residues from the palm oil industry are the main contributors to biomass waste in Malaysia, and these wastes require extra attention with respect to handling. The biomass waste is a renewable resource that can potentially be used to produce absorbents, fuels, and chemical feedstocks through the pyrolysis process. In this study, the wastes of palm shell, empty fruit bunches, and mesocarp fiber were characterized and then pyrolyzed in a fixed-bed reactor under the following conditions: a temperature of 500 °C, a nitrogen flow rate of 2 L/min and reaction time of 60 min. After pyrolysis, characterization of the products with an emphasis on the bio-oil and the bio-char was performed using various approaches (including Karl Fischer water-content tests, FTIR, SEM, TGA and CNH/O analyses). The results showed that the pyrolysis of palm oil wastes yielded more bio-oil than bio-char or non-condensable gases. The results also indicated that all of the bio-oils were acidic and contained high levels of oxygen. The bio-oils heating values were low and varied from 10.49 MJ/kg to 14.78 MJ/kg. The heating values of the bio-chars (20–30 MJ/kg) were higher than those of the bio-oils. Among the biomasses studied in this work, palm shell contained the highest level of lignin and showed the highest levels of bio-char yield and fixed and elemental carbon in the raw and bio-char form.

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Acknowledgements

The authors would like to thank the University of Malaya for fully funding the work described in this publication through the Bright Sparks Program, the Postgraduate Research Grant, and the HIR Grants (D000011-16001 and D000020-16001).

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Authors and Affiliations

  1. Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia

    Faisal Abnisa, Arash Arami-Niya, W. M. A. Wan Daud & J. N. Sahu

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  1. Faisal Abnisa
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  2. Arash Arami-Niya
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  3. W. M. A. Wan Daud
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  4. J. N. Sahu
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Correspondence to Faisal Abnisa.

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Abnisa, F., Arami-Niya, A., Daud, W.M.A.W. et al. Characterization of Bio-oil and Bio-char from Pyrolysis of Palm Oil Wastes. Bioenerg. Res. 6, 830–840 (2013). https://doi.org/10.1007/s12155-013-9313-8

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