Abstract
The thermal decomposition behavior of char waste produced from the air gasification of Empty Fruit Bunch (EFB) briquette was examined using thermogravimetric analysis (TGA). A comparison between the thermal decomposition behavior of char waste and EFB briquette is also presented. The results indicate that the char waste produced decreased from 22 % to 18 % with increasing temperature from 600 °C to 700 °C during gasification. This is due to the effect of high temperatures on the primary char decomposition reactions. It was observed that char degradation occurs in two steps; char degradation I & II with weight losses of 17 % and 32 % respectively. This showed that only ~ 50 % char was decomposed during thermal analysis, hence higher temperatures are required to ensure complete decomposition. The TGA curve for EFB briquette showed that complete thermal decomposition of EFB briquette occurs in four stages namely; drying, devolatization, reduction and char degradation. The most significant weight loss 2.51 mg or 49.31 % occurred during devolatization.
Highlights
Gasification is considered a promising route for the valorization of lignocellulosic biomass waste
This study is aimed at examining the thermal decomposition behavior of Char produced from the air gasification of pulverized Empty Fruit Bunch (EFB) briquette in a fixed bed tubular using thermogravimetric analysis (TGA)
The results indicate that 18 % to 22 % char is produced during the air gasification of EFB briquette in the reactor
Summary
Gasification is considered a promising route for the valorization of lignocellulosic biomass waste. Biomass gasification occurs in four stages; drying, devolatization, char gasification and combustion resulting in the production of syngas (CO, H2) [1]. Biomass gasification produces char (intermediate product) of the thermochemical conversion process. The formation of char from devolatization or pyrolysis is considered to be the most important step in the thermochemical conversion of lignocellulosic biomass. A comprehensive understanding of the thermochemical process is required to improve the process dynamics and scale up for future applications
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