A1 Journal article (refereed)
Effect of tire-char ash on the extent of synergy during CO2 co-gasification with hydrochar from potassium-rich coconut fiber (2020)

Hungwe, D., Khoshbouy, R., Ullah, S., Ding, L., Yoshikawa, K., & Takahashi, F. (2020). Effect of tire-char ash on the extent of synergy during CO2 co-gasification with hydrochar from potassium-rich coconut fiber. Energy and Fuels, 34(7), 8110-8119. https://doi.org/10.1021/acs.energyfuels.0c00895

JYU authors or editors

Publication details

All authors or editors: Hungwe, Douglas; Khoshbouy, Reza; Ullah, Saleem; Ding, Lu; Yoshikawa, Kunio; Takahashi, Fumitake

Journal or series: Energy and Fuels

ISSN: 0887-0624

eISSN: 1520-5029

Publication year: 2020

Volume: 34

Issue number: 7

Pages range: 8110–8119

Publisher: American Chemical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1021/acs.energyfuels.0c00895

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/70166

Abstract

The influence of inherent tire char ash during co-gasification with coconut hydrochar prepared at different intensities was investigated by thermogravimetric analysis to ascertain the extent to which synergistic interaction, reactivity, and activation energy reduction were altered. High-ash tire tread (TT) and low-ash sidewall (SW) both exhibited enhanced synergy, reactivity, and activation reduction upon co-gasification with hydrochars; however, the extent of promotion was more pronounced in SW-hydrochar blends. This difference was caused by the inhibiting nature of TT inherent ash, particularly the role of Si-containing compounds. Inhibition in TT-hydrochar blends was mainly due to the promotion of alkaline and alkaline earth metal transformation into inactive silicates, and to a lesser extent, the mass transfer effect caused by accumulated ash, especially at conversions higher than 70\%. The extent of enhancement correlated well with the concentration of available alkaline and alkaline earth metals. The findings may be useful in justifying the exclusion of high ash tire char as gasification feedstock to mitigate ash-related problems.

Keywords: biochar; biomass (industry); coconut; refuse fuels; rubber; gasification; synergy

Contributing organizations

Ministry reporting: Yes

VIRTA submission year: 2020

JUFO rating: 1