Abstract:
Abstract- Lignite is classified as a low-rank coal due to its low content of calories. Co-pyrolysis with biomass
waste such as palm empty fruit bunches (EFB) here can be used to increase lignite’s economic value. The
mixture of these two materials can produce an alternative energy source called hybrid coal (HC). This study
aims to determine the optimum temperature for co-pyrolysis of lignite and EFB as well as characterize
liquid (tar) and solid product (HC). Its kinetic study was evaluated as well. A raw material of 200 grams
with a composition of 22.5% (w/w) EFB to lignite was put into a reactor to react at a temperature range of
300-450oC for 1 hour. To form hybrid coal briquettes (HCB), tapioca adhesive with a concentration of 6%
(w/w) was added to the solid product (HC). The results showed that the tar yield increased with increasing
temperature from 300 to 450oC. Similarly, the calorific value of HC increased by 14.50% as also occurred
in other physical properties of HC. Meanwhile, the kinetic study revealed that the model was well-fitted
to the data, and confirmed the obtained results. Thus, this research can support the development of
affordable alternative energy to be implemented in large-scale production.
Keyword: Alternative energy, Co-pyrolysis, Empty fruit bunch, Hybrid coal, Lignite
