Title:
Development and Validation of a Gasification Model Including Non-equilibrium Methane Production
Author(s):
Falch, H., Riboldi, L., Anantharaman, R., Birgen, C.
Document(s):
Paper
Poster
Abstract:
In this work, a gasification model for biomass conversion to syngas was developed and validated building upon an equilibrium model developed by Rodrigues et al. [1]. The model development and validation were guided by data from entrained flow gasification experiments performed at SINTEF Energy Research [2] with three different types of feedstocks. The main limitation of the original gasification model was that, as an equilibrium model, it did not predict any formation of CH4 at the experimental temperatures. CH4 production was modelled by introducing a pyrolysis step before the actual gasification, occurring at a fixed temperature, .T, below the gasification temperature. The selection of a proper .T is an important tuning step for the model and is dependent on the feedstock. Using .T = 350°C showed a good improvement compared to the original equilibrium model, reducing the mean absolute percentage error (MAPE) from 42.4% and 35.4% to 28.4% and 26.1% for the first two feedstocks. For the last feedstock, used for validation, .T = 350°C overpredicted the CH4 drastically due to the higher carbon and hydrogen and lower oxygen concentration in the feedstock. Reducing .T to 100°C predicted the CH4 concentration much better. With this adjustment the MAPE improved from 46.4% for the original model to 27.7% for the extended model. This shows that the approach developed allows including CH4 production, leading to an overall increase in the accuracy of the simulations while retaining the advantages of an equilibrium model.
Keywords:
biomass gasification, pyrolysis, bioenergy with CCS
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Gasification for synthesis gas production
Event:
33rd European Biomass Conference and Exhibition
Session:
4BV.5.18
Pages:
771 - 777
ISBN:
978-88-89407-25-7
Paper DOI:
10.5071/33rdEUBCE2025-4BV.5.18
Price:
FREE
