Year: 2013
Type: article
Abstract: The efficient utilisation of biomass resources is of utmost importance. Biomass gasification offers much higher efficiencies than combustion. Gasification is a process in which a fuel is converted to a combustible gas (syngas). A dual fluidised bed gasifier known as the fast internally circulating fluidised bed (FICFB) was selected. It has been demonstrated at industrial scale and data is readily available for model validation. An Aspen Plus model was developed to simulate the FICFB gasifier. The model is based on Gibbs free energy minimisation and the restricted equilibrium method was used to calibrate it. The model has been validated and predicts syngas composition, heating value and cold gas efficiency (CGE) in very good agreement with published data. Important operating parameters such as gasification temperature (Tg), biomass moisture, steam to biomass ratio (STBR), air-fuel ratio and air and steam temperature were varied. Tg and STBR were found to have very strong influence on syngas composition and heating value. Biomass moisture had the most significant impact on CGE. The other parameters, although less important, were found to have substantial effect on CGE.
Authors: Wayne Doherty, Anthony Reynolds, David M. Kennedy
Language: English
Subfield: Fuel Technology
Field: Energy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2116787736