Wet-ground empty fruit bunches (EFBs),
dry-ground EFB, and pelletized
EFB were gasified in a laboratory-scale updraft fixed-bed reactor
at differing temperatures and equivalent ratios (ERs) between 0.19
and 0.78 to evaluate the performance and quality of the syngas under
autothermal operating conditions. In addition, the theoretical estimation
of the key performance indicator of the ashes on the performance of
the gasification process was obtained. The results show that for ERs
> 0.4 the autothermal operating condition was achieved for pretreatments
with pelletized and dry-ground EFBs, with reactor operating temperatures T > 700 °C. With wet EFB, this condition is achieved
at any ER value. The average composition of the syngas from pelletized
EFB presented the best average concentrations of the combustible species
CO, H2, and CH4 when the ER values were between
0.25 and 0.40. The highest hot and cold thermal efficiency values
were obtained for the gasification of EFB pellets with ER values between
0.25 and 0.40. For ground EFB, increases in the ER value led to improvements
in hot thermal efficiency. Finally, during the EFB pellet gasification
tests, no agglomeration and sintering problems were evidenced in comparison
with wet-ground and dry-ground EFBs that showed slag formation, especially
at ER < 0.46.
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