Title
Co-gasification reactivity and synergy of banana residue hydrochar and anthracite coal blends
Author
Alexander Mosquedaa, Juntao Wei, Katleya Medrano, Hazel Gonzales, Lu Ding, Guangsuo Yu, Kunio Yoshikawa
Year
2019
Journal
Applied Energy
Abstract
This work investigated the influence of biomass hydrothermal treatment (HT) on co-gasification reactivity and
synergy of anthracite coal and banana residue hydrochar (HTC) prepared at varying HT temperatures (180 °C,
200 °C and 220 °C). In addition, the effect of HTC char on chemical structure evolution of coal char in cogasification
process was studied to correlate the co-gasification synergy. The results revealed that the co-gasification
reactivity of the blended chars was enhanced with decreasing HT temperature. Moreover, the differences
in synergistic effect on co-gasification reactivity was greatly influenced by HT temperature, and a more pronounced
synergistic effect was achieved at the lowest HT temperature (180 °C). This phenomenon could be well
explained by the chemical structure variations of coal char during co-gasification. Active AAEM contained in
HTC char showed positive effect on the chemical structure evolution of coal char, specifically on the decrease in
the order degree of carbon structure as well as increase in the amount of amorphous carbon structure of coal
char; furthermore, this positive effect was weakened as HT temperature increased, being more evident for HT
temperature of 180 °C than 200 °C and 220 °C. The findings in this work would be useful in revealing the cogasification
synergy mechanism of biomass hydrochar and coal blends, and may provide valuable information on
the relevance of HT to industrial-scale gasification systems.
Instrument
NRS-4100
Keywords
Raman imaging microscopy, Co-gasification, Reactivity, Synergy, Hydrothermal treatment, Biomass