Biomass gasification in a downdraft fixed-bed gasifier: Optimization of operating conditions
| Autor: | Mahdi Rezaei, Seyed Hashem Samadi, Hossein Kargar Jahromi, Reza Jahromi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Wood gas generator
business.industry Applied Mathematics General Chemical Engineering Energy conversion efficiency Biomass 02 engineering and technology General Chemistry Raw material 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering 020401 chemical engineering Yield (chemistry) Environmental science 0204 chemical engineering 0210 nano-technology Process engineering business Bagasse Water content Syngas |
| Zdroj: | Chemical Engineering Science. 231:116249 |
| ISSN: | 0009-2509 |
| DOI: | 10.1016/j.ces.2020.116249 |
| Popis: | In the present study, a CFD model was developed for the biomass gasification process in a downdraft fixed-bed gasifier. Sugarcane bagasse was used as feedstock in gasification experiments and simulation studies. Several operating parameters, including the velocity and preheating temperature of the inlet air/steam mixture, steam to air ratio (S/A), and biomass moisture content (MC), were investigated to achieve the maximum syngas yield (CO2, H2, CH4, and CO) and conversion efficiency. Results proposed that the syngas yield and conversion efficiency were maximized at S/A of 0.67 and inlet velocity of 20 m/s. In addition, increasing the preheating temperature of air/steam and decreasing the MC of bagasse had positive impacts on the gasification process. The maximum conversion efficiency was 69.14% at the optimum operating conditions. This study offers an advanced tool for the simulation of gasification process that can be used in primary-stage engineering designs. |
| Databáze: | OpenAIRE |
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