| 1. |
- Suarez, J. A., et al.
(author)
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A phenomenological energy model of biomass pyrolysis under autothermal fluidized bed conditions
- 2006
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In: Energy Sources Part a-Recovery Utilization and Environmental Effects. - : Informa UK Limited. - 1556-7036 .- 1556-7230. ; 28:8, s. 705-714
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Journal article (peer-reviewed)abstract
- In Cuba a variety of types of biomass is being investigated for energy conversion through thermochemical processes into solid, liquid, and gas products. A continuous bench fluidized bed pyrolysis has been designed and is currently under testing. In this article, a transport model has been developed to simulate the axial temperature fields in a bench. The model and experimental results indicated that (1) two zones exist inside of the fluidization column, the dense bed where the exothermic and endothermic reactions are active, and the freeboard zone where the temperature of the pyrolysis product decreases continuously; (2) the bed temperature increases with an increase in the air factor. The predicted temperature is in quantitative agreement with experimental measurements.
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| 2. |
- Suarez, J. A., et al.
(author)
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Autothermal fluidized bed pyrolysis of Cuban pine sawdust
- 2006
-
In: Energy Sources Part a-Recovery Utilization and Environmental Effects. - : Informa UK Limited. - 1556-7036 .- 1556-7230. ; 28:8, s. 695-704
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Journal article (peer-reviewed)abstract
- Oxidative pyrolysis of Cuban pine sawdust was investigated using an autothermal fluidized bed reactor. Biomass particles were fed continuously (8.13 Kg/h) in a bed, fluidized by air gas. Experiments were conduced at three different dimensionless air factors 1, 1.5, and 2 (defined as ratio of actual air flow rate to stoichiometric air flow rate). The various physical and chemical characteristics of the pyrolysis products acquired in these conditions were identified. The results indicated that (1) the operating temperature can be correlated with the air factor; (2) the higher air factor promotes high temperature and contributes to the secondary reactions, which lead to less liquid; (3) the physicochemical characterization of the pyrolysis products indicated that the air factor, in the range studied, does not have a notable influence in their properties; (4) the liquid and char products obtained may be a potentially valuable source of chemical feedstocks.
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