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Process Simulation of Steam Gasification of Torrefied Woodchips in a Bubbling Fluidized Bed Reactor Using Aspen Plus

Nguyen, Minh Nhut ; Alobaid, Falah ; Epple, Bernd (2021):
Process Simulation of Steam Gasification of Torrefied Woodchips in a Bubbling Fluidized Bed Reactor Using Aspen Plus. (Publisher's Version)
In: Applied Sciences, 11 (6), e-ISSN 2076-3417,
DOI: 10.26083/tuprints-00019344,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Process Simulation of Steam Gasification of Torrefied Woodchips in a Bubbling Fluidized Bed Reactor Using Aspen Plus
Language: English
Abstract:

A comprehensive process model is proposed to simulate the steam gasification of biomass in a bubbling fluidized bed reactor using the Aspen Plus simulator. The reactor models are implemented using external FORTRAN codes for hydrodynamic and reaction kinetic calculations. Governing hydrodynamic equations and kinetic reaction rates for char gasification and water-gas shift reactions are obtained from experimental investigations and the literature. Experimental results at different operating conditions from steam gasification of torrefied biomass in a pilot-scale gasifier are used to validate the process model. Gasification temperature and steam-to-biomass ratio promote hydrogen production and improve process efficiencies. The steam-to-biomass ratio is directly proportional to an increase in the content of hydrogen and carbon monoxide, while gas yield and carbon conversion efficiency enhance significantly with increasing temperature. The model predictions are in good agreement with experimental data. The mean error of CO₂ shows the highest value of 0.329 for the steam-to-biomass ratio and the lowest deviation is at 0.033 of carbon conversion efficiency, respectively. The validated model is capable of simulating biomass gasification under various operating conditions.

Journal or Publication Title: Applied Sciences
Journal volume: 11
Number: 6
Collation: 18 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
Divisions: 16 Department of Mechanical Engineering > Institut für Energiesysteme und Energietechnik (EST)
Date Deposited: 23 Aug 2021 12:04
Last Modified: 23 Aug 2021 13:04
DOI: 10.26083/tuprints-00019344
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-193446
Additional Information:

Keywords: steam gasification; biomass; bubbling fluidized bed; Aspen Plus simulation; hydrogen production

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19344
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