Abstract
The present study developed an ASPEN plus model for the study of the gasification behaviors of biomass in a dual fluidized bed (DFB) using steam as gasification agent. Model validation was performed by comparing the predicted results with the experimental data obtained from a steam-blown DFB gasification system and, a good agreement was attained. Sensitivity analysis was done to obtain producer gas composition using wood pellets and different gasification parameters like H2 yield, gas yield, H2/CO, tar yield, cold gas efficiency (CG-E) and char conversion efficiency (CC-E) using gasification temperature (750–900 °C), steam/biomass ratio, S/B (0.28–1.72) and steam temperature, ST (300–700 °C). Increasing the temperature and S/B contributed to the yield of H2 and the tar conversion rate. The results showed that both variables (temperature and S/B) have a strong positive influence on the quality and quantity of the produced syngas. Results showed that H2 content increased while CO and CH4 decreased with increasing S/B from 0.28 to 1.72 at 850 °C. The gas yield and H2/CO increased from 0.83 to 1.21 Nm3/kg and 0.9 to 1.87 with increasing S/B from 0.28 to 1.72, respectively, while tar yield decreased from 9.1 to 8.02 g/Nm3. The content of H2, H2 yield and CG-E increased with the rise of ST from 300 to 700 °C, while an opposite trend was achieved for tar yield.
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Acknowledgements
This paper is supported by Science Popularization Special Fund Project of Shaanxi Science and Technology Association (Grant: GJ2021-34), International Joint Research Center for Electromechanical Engineering and Precision Manufacturing, Research Project on Postgraduate Education and Teaching Reform of Xi'an University of Technology (Grant: XAGDYJ210203), Xi'an Science and Technology Project (Grant: 2020KJRC0032), Research and Practice Project of Comprehensive Reform of Postgraduate Education in Shaanxi Province (Grant: YJSZG2020075), Science and Technology Planning Project of Shaanxi Province (2020KW-017), Shaanxi Innovation Capability Support Plan (Grant: 2022PT-02) and Shaanxi Key Research and Development Plan (Grant: 2020GY-147).
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YC performed writing, model development and literature research; YB analyzed writing, validation and data analysis; JD did writing, review the results and literature review.
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Cao, Y., Bai, Y. & Du, J. Process simulation of staging pyrolysis and gasification of biomass in a dual fluidized bed system. Clean Techn Environ Policy 26, 839–848 (2024). https://doi.org/10.1007/s10098-023-02654-5
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DOI: https://doi.org/10.1007/s10098-023-02654-5