Co-pyrolysis of pine nut shells with scrap tires

[Display omitted] •Co-pyrolysis of pine nut shells with scrap tires was carried out at 500°C.•The co-pyrolysis process improved the characteristics of all pyrolysis products.•Biomass-derived oil can be upgraded via co-pyrolysis of biomass with scrap tires.•The chars from co-pyrolysis have potential...

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Bibliographic Details
Published in:Fuel (Guildford) 2014-12, Vol.137, p.85-93
Main Authors: Uçar, Suat, Karagöz, Selhan
Format: Article
Language:English
Subjects:
Applied sciences
Biomass
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fuels
Natural energy
Pyrolysis
Scrap tires
Upgrading
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Summary:[Display omitted] •Co-pyrolysis of pine nut shells with scrap tires was carried out at 500°C.•The co-pyrolysis process improved the characteristics of all pyrolysis products.•Biomass-derived oil can be upgraded via co-pyrolysis of biomass with scrap tires.•The chars from co-pyrolysis have potential to be used as a commercial solid fuel. The co-pyrolysis of pine nut shells (PNS) with scrap tires (ST) at different blend ratios was carried out at 500°C. The addition of ST into PNS in the co-pyrolysis process not only increased bio-oil yields but also improved bio-oil characteristics when compared with the pyrolysis of PNS. The carbon content in bio-oils from all PNS/ST blend ratios was higher and oxygen content was lower than that of PNS-derived oil. This is an indication of the improved characteristics of bio-oils from the co-pyrolysis of biomass with scrap tires. The blend ratio in the feedstock of co-pyrolysis had a significant effect on the product distributions and physico-chemical properties of bio-oils. When heating values of bio-oils produced from the pyrolysis of PNS were compared with bio-oils obtained from the co-pyrolysis of PNS with ST, the addition of ST into PNS led to increase heating values of bio-oils with the exception of PNS/ST (4:1)-derived bio-oil. In addition, the heating values of gas products and levels of hydrogen and hydrocarbons (from C1 to C4) in the gas products from the co-pyrolysis of PNS/ST blends were higher than that of the pyrolysis of PNS. The heating values of chars produced from the co-pyrolysis of PNS/ST blends were found to be in the range of 31.1 and 32.9MJkg−1.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2014.07.082