Abstract
The methods currently used for designing a fluidized bed reactor in gasification plants do not meet an integrated methodology that optimizes all the different parameters for its sizing and operational regime. In the case of small-scale (several tens of kWs biomass gasifiers), this design is especially complex, and, for this reason, they have usually been built in a very heuristic trial and error way. In this paper, an integrated methodology tailoring all the different parameters for the design and sizing of a small-scale fluidized bed gasification plants is presented. Using this methodology, a 40 kWth biomass gasification reactor was designed, including the air distribution system. Based on this design, with several simplified assumptions, a reactor was built and commissioned. Results from the experimental tests using this gasifier are also presented in this paper. As a result, it can be said the prototype works properly, and it produces syngas able to produce thermal energy or even electricity.
Highlights
Introduction of a SmallScale Bubbling FluidizedBiomass gasification is one of the most promising technologies for converting biomass into a fuel; it is a relatively clean process able to produce syngas, which can be used as a fuel
For design purposes, safety factor (SF) = 1.5
Ceramic coating can be used in the reactions zone of the reactor; the reactor would be more fragile to the thermal expansion of the two different materials, and this option would increase the cost and maintenance of the reactor
Summary
Biomass gasification is one of the most promising technologies for converting biomass into a fuel; it is a relatively clean process able to produce syngas, which can be used as a fuel. Biomass gasification involves a series of endothermic reactions supported by the heat produced from combustion reactions or other heating methods. Through a series of chemical reactions, it yields combustible synthesis gases, such as H2 , CO, and CH4 [2]. The gasification process has been used for different application areas, such as power generation, gaseous and liquid fuel production, or the chemical sector. The generation of quality syngas with a high heating value depends on the high H2 and CO content as well as the high fuel conversion ratio and gas efficiency
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