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Open AccessArticle

A Detailed One-Dimensional Hydrodynamic and Kinetic Model for Sorption Enhanced Gasification

University of Stuttgart, Institute of Combustion and Power Plant Technology (IFK), Pfaffenwaldring 23, 70569 Stuttgart, Germany
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Appl. Sci. 2020, 10(17), 6136; https://doi.org/10.3390/app10176136
Received: 21 July 2020 / Revised: 19 August 2020 / Accepted: 27 August 2020 / Published: 3 September 2020
Increased installation of renewable electricity generators requires different technologies to compensate for the associated fast and high load gradients. In this work, sorption enhanced gasification (SEG) in a dual fluidized bed gasification system is considered as a promising and flexible technology for the tailored syngas production for use in chemical manufacturing or electricity generation. To study different operational strategies, as defined by gasification temperature or fuel input, a simulation model is developed. This model considers the hydrodynamics in a bubbling fluidized bed gasifier and the kinetics of gasification reactions and CO2 capture. The CO2 capture rate is defined by the number of carbonation/calcination cycles and the make-up of fresh limestone. A parametric study of the make-up flow rate (0.2, 6.6, and 15 kg/h) reveals its strong influence on the syngas composition, especially at low gasification temperatures (600–650 °C). Our results show good agreement with the experimental data of a 200 kW pilot plant, as demonstrated by deviations of syngas composition (5–34%), lower heating value (LHV) (5–7%), and M module (23–32%). Studying the fuel feeding rate (22–40 kg/h), an operational range with a good mixing of solids in the fluidized bed is identified. The achieved results are summarized in a reactor performance diagram, which gives the syngas power depending on the gasification temperature and the fuel feeding rate. View Full-Text
Keywords: one-dimensional SEG model; dual fluidized bed; sorbent deactivation; hydrodynamics; kinetics; fuel feeding rate; biomass one-dimensional SEG model; dual fluidized bed; sorbent deactivation; hydrodynamics; kinetics; fuel feeding rate; biomass
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MDPI and ACS Style

Beirow, M.; Parvez, A.M.; Schmid, M.; Scheffknecht, G. A Detailed One-Dimensional Hydrodynamic and Kinetic Model for Sorption Enhanced Gasification. Appl. Sci. 2020, 10, 6136. https://doi.org/10.3390/app10176136

AMA Style

Beirow M, Parvez AM, Schmid M, Scheffknecht G. A Detailed One-Dimensional Hydrodynamic and Kinetic Model for Sorption Enhanced Gasification. Applied Sciences. 2020; 10(17):6136. https://doi.org/10.3390/app10176136

Chicago/Turabian Style

Beirow, Marcel; Parvez, Ashak M.; Schmid, Max; Scheffknecht, Günter. 2020. "A Detailed One-Dimensional Hydrodynamic and Kinetic Model for Sorption Enhanced Gasification" Appl. Sci. 10, no. 17: 6136. https://doi.org/10.3390/app10176136

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