Title:
Comparison Between Thermodynamic Calculations and Measurements of the Volatility of Inorganic Species from Different Biomasses During Steam Gasification in a Fluidized Bed
Author(s):
Defoort, F., Ravel, S., Castelli, P., Campargue, M.
Document(s):
Paper
Abstract:
The objective of this study concerns the behavior of inorganics during the steam gasification of biomasses by an approach consisting to compare thermodynamic calculations with experiments. Calculations were performed in the same conditions as the experiments with the adequate software (Factsage or Gemini2) and compounds associated database. Measurements were performed during steam gasification of wood and pellets of agricultural residues called Calys in the bubbling fluidized bed (LFHT) reactor coupled with the high temperature reactor (PEGASE) in CEA Grenoble [1]. Several gasification tests in the LFHT were performed where temperature varied between 750 and 910°C. Temperature of the PEGASE facility was between 1100 or 1400°C. The gaseous inorganic species that are measured with the best confidence are H2S, COS, NH3, HCN because specific sampling have been done for these species during the ANAPUR project [2]. Interesting results are also obtained for alkali (KCl) and slag (in the bed). A quite good agreement between measurement at the exhaust of the fluidized bed and calculations is obtained except for NH3 and HCN. This is in agreement with literature. The reason proposed in the literature is a kinetic limitation of the NH3 dissociation. Some interesting results are also obtained at the exhaust of the high temperature reactor PEGASE.
Keywords:
alkali, biomass, gasification, measurement, syngas, inorganics, thermodynamic calculations
Topic:
Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
CO2 issues and special fuels for gasification to syngas
Event:
19th European Biomass Conference and Exhibition
Session:
OB5.5
Pages:
1137 - 1144
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-OB5.5
Price:
FREE
