Application of the MP-PIC Method for Modelling a Novel Plant Design for Biomass Chemical Looping Gasification

Dymala, Timo

• Publisher: Cuvillier Verlag
• Year: 2023
• eBook ISBN:
  9783736968769
• Print ISBN:
  9783736978768
• Edition: 1

To mitigate climate change and to reduce the emissions of greenhouse gases the interest in the utilization of renewable energies has increased drastically in the recent years. Due to the broad availability and its negative carbon emissions biomass is an attractive renewable energy resource. By applying the biomass chemical looping gasification technology the biomass can be used for the generation of electricity or the production of syngas as feedstock for synthetic fuels such as hydrogen and methanol.To promote the progress of this technology, a novel two-stage design for the gasification reactor is proposed in this work aiming to reduce the undesired tar content in the produced syngas, while maintaining a high syngas yield. To investigate the performance of this design, a reaction model was developed using the so-called multiphase particle-in-cell (MP-PIC) method. Furthermore, optimization recommendations for biomass chemical looping processes in general were derived to adjust the syngas composition and to increase the syngas yield.

Table of contents

• 1.Introduction
• 1.1 Fluidized Bed Technology
• 1.2 Fundamentals of Biomass Gasification
• 1.3 CFD Modeling
• 1.4 State of the Art
• 1.5 Outline of the Thesis
• 2 Mixing Behavior of Biomassand Bed Material
• 2.1 Experimental and Simulation Setup
• 2.2 Influence of Blended Acceleration Model
• 2.3 Influence of Grid Resolution
• 2.4 Influence of Particle Stress Model
• 2.5 Influence of Fluidization Velocity
• 2.6 Summary
• 3 Hydrodynamic Analysis ofCirculating Fluidized Beds
• 3.1 Experimental and Simulation Setup
• 3.2 Drag Model Development
• 3.3 Simulation Results
• 3.4 Summary
• 4 Biomass Gasification
• 4.1 Experimental and Simulation Setup
• 4.2 Reaction Network
• 4.3 Influence of Grid Resolution
• 4.4 Influence of Bed Mass
• 4.5 Influence of Reactor Temperature
• 4.6 Influence of Steam-to-Biomass Ratio
• 4.7 Summary
• 5 Biomass Gasification UsingIlmenite as Oxygen Carrier
• 5.1 Experimental and Simulation Setup
• 5.2 Oxygen Carrier Reaction Network
• 5.3 Influence of Grid Resolution
• 5.4 Influence of Oxidation Degree
• 5.5 Influence of Reactor Temperature
• 5.6 Summary
• 6 Concept of a Two-StagedFuel Reactor for Biomass Chemical Looping Gasification
• 6.1 Concept Development
• 6.2 Simulation Setup
• 6.3 Reactor Hydrodynamics
• 6.4 Influence of Oxygen Carrier to Sand Ratio
• 6.5 Influence of Biomass Injection Position
• 6.6 Influence of Oxidation Degree
• 6.7 Influence of Reactor Temperature
• 6.8 Influence of Second Fuel Reactor Stage
• 6.9 Summary
• 7 Conclusion
• Bibliography
• A Mixing Behavior:Supplementary Data
• B Drag Model Development:Supplementary Data
• C Adaption of the OxygenCarrier Kinetics
• D Two-Staged Fuel Reactor: Supplementary Data
• List of Publications