Title:
Effects of Pressure on the Gasification of Poultry Litter
Author(s):
Font-Palma, C., Martin, A.D.
Document(s):
Paper
Abstract:
The poultry industry is large in the EU which generates litter as waste. Improper application and/or overuse of poultry litter as fertiliser can cause the spread of pathogens and ground water pollution. Therefore, gasification is proposed as a potential solution for disposal and energy generation. Conventional gasification systems are large scale with an atmospheric gasifier that requires cooling of the product gas. This work, however, employs a small on-site pressurised gasifier to maintain all stages hot. A model for the optimisation of air gasification integrated with a gas turbine (GT) engine was developed on ASPEN Plus to achieve 200 kW of net power output. Steady-state and chemical equilibrium were assumed in a Gibbs free energy minimisation gasifier. The effects of varying the pressure ratio and inlet temperature of the GT on carbon conversion, gasification temperature, product gas composition, higher heating value and process efficiency were evaluated. At lower pressure ratios more energy was recuperated by preheating the product gas and air before entering the GT combustion chamber. Increasing the pressure ratio improved the process efficiency up to a maximum with air preheat constrained to 724 K. The increase of the GT inlet temperature also improved the process efficiency.
Keywords:
agricultural residues, gas turbine, gasification, integration, modelling, small scale application, modeling
Topic:
Thermochemical conversion - Gasification for power and CHP and polygeneration
Subtopic:
Gasification for power and CHP and polygeneration
Event:
18th European Biomass Conference and Exhibition
Session:
VP2.1.39
Pages:
743 - 747
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-VP2.1.39
Price:
FREE
