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Modelling of advanced gasification systems (MAGSY): Simulation and validation for the case of the rising co-current reactor

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  • Vakalis, Stergios
  • Moustakas, Konstantinos

Abstract

This study presented a new model (named MAGSY) for the simulation of advanced small-scale gasification systems. These novel designs can be complex and may combine several features that are not typical for conventional systems. MAGSY is a vis-à-vis and process-based model that has been able to account for the excess air in the combustion sub-process (zone) which is conveyed to the pyrolysis zone creating practically a coupled system of sub-stoichiometric combustions. Onsite monitoring results from a rising co-current gasifier are used for the validation of the model. Simulations have been performed for excess air regimes between 11% and 20% and the produced gases from the “oxidation reactions” system were reformed by the “char-gas reactions” system. The model calculated a hydrogen molar fraction of 19.53% and carbon monoxide molar fraction of carbon monoxide 24.45% while the case study values were 19.19% and 24.02% respectively. Both gases were shown to have inverted correlation with equivalent air ratios at values bigger than 99.3%, which is a notable point. For equivalent ratios of 0.l7–0.25 the model returned char yields of 1.2–1.7% and the measurement from the case study showed that the char yield was 1.5%. Finally, a detailed exergy analysis of the gasifier is presented and validated with the values that were retrieved from the monitoring. MAGSY is able to adjust and model reactors with different levels of complexity.

Suggested Citation

  • Vakalis, Stergios & Moustakas, Konstantinos, 2019. "Modelling of advanced gasification systems (MAGSY): Simulation and validation for the case of the rising co-current reactor," Applied Energy, Elsevier, vol. 242(C), pages 526-533.
    • Handle: RePEc:eee:appene:v:242:y:2019:i:c:p:526-533
    DOI: 10.1016/j.apenergy.2019.03.144
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    1. Janajreh, Isam & Adeyemi, Idowu & Raza, Syed Shabbar & Ghenai, Chaouki, 2021. "A review of recent developments and future prospects in gasification systems and their modeling," Renewable and Sustainable Energy Reviews, Elsevier, vol. 138(C).
    2. Stergios Vakalis & Snehesh Shivananda Ail & Konstantinos Moustakas & Marco J. Castaldi, 2023. "Operation and Thermodynamic Modeling of a Novel Advanced Hydrothermal Reactor: Introduction of the Novel 3-Step Evolution Model," Energies, MDPI, vol. 16(4), pages 1-14, February.
    3. Porcu, Andrea & Xu, Yupeng & Mureddu, Mauro & Dessì, Federica & Shahnam, Mehrdad & Rogers, William A. & Sastri, Bhima S. & Pettinau, Alberto, 2021. "Experimental validation of a multiphase flow model of a lab-scale fluidized-bed gasification unit," Applied Energy, Elsevier, vol. 293(C).

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