A new model, which combines in-bed and freeboard sulfation, significantly improves the ability to predict sulfur capture by limestone sorbents in fluidized-bed coal combustors. In this model, the in-bed hydrodynamics are described in terms of a bubble phase and an emulsion phase while the freeboard
Characterization of Thai limestone for desulphurization in a fluidized bed combustor
โ Scribed by Suvit Tia; Tanokkorn Bunjungla-eid
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 196 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0363-907X
- DOI
- 10.1002/er.904
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โฆ Synopsis
The objective of this study is to determine the chemical kinetics of desulphurization of Thai limestone in an atmospheric fluidized bed combustor (AFBC). The experiments, which employed the batch technique using the limestone samples from six major sources in Thailand, were performed in a laboratory-scale AFBC. The results obtained were analysed and correlated in the form of apparent reaction rate and deactivation rate constants as a function of operating conditions of the furnace and their properties, respectively. The formulae derived from these correlations were kept as general as possible in order that they could be used as input parameters for the selected mathematical model of desulphurization in an AFBC that is suitable for practical use. The predicted results were in good agreement with the experimental data reported in the literature.
๐ SIMILAR VOLUMES
The processes in a fluidized-bed combustor are analysed, and equations are written to express the absorption rate of sulphur dioxide by limestone in admixture with the fuel feed. The procedure adopted for solution of the equations is described, and some of the results predicted by the model are brie
A model of coal combustion dynamics in a fluidized bed is developed in this study. The model is carried out on the premise that the total combustion response can be decomposed into two distinct processes: volatile combustion and char combustion. In this investigation, combustion dynamics are examine