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Hydrothermally-treated empty fruit bunch cofiring in coal power plants: a techno-economic assessment
Co-firing biomass with coal is believed to be able to improve the domestic energy security in Indonesia.
Hydrothermal treatment process prior to the combustion is needed to convert raw biomass into coal-like product. The
main objective of this research is to demonstrate the technological, economic and environmental feasibility of the
cofiring coal with hydrothermally-treated empty fruit bunch (HT-EFB) through extensive laboratory investigations,
simulations, system analyses and economic assessments from literature. Based on computational fluid dynamics
(CFD) simulation, HT-EFB mass fraction of 10 to 25% seems to be the most preferable cofiring condition in term of
temperature and produced gas compositions including CO2, CO, NO and SOx. An aspen plus simulation showed
combining hydrothermal treatment with cofiring in an integrated system power plant could be a positive way to
generate electricity with overall energy efficiency 37.09%. Moreover, fuel production cost, EFB supply capacity from
palm mills surrounding the power plants, and transportation cost are required parameters to be considered for
developing large scale biomass cofiring and integrated supply chain.
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