Biomass Gasification in Fluidized Beds
Conversion of fuel particles in a fluidized bed is also a particle changing process like granulation or coating. Thus we want to transfer our methods and perceptions from NaWiTec to the modeling of these high temperature processes. The aim is to develop a model based controller to optimize the energy yield of the biomass, and to respond fast in case of critical process states.

The basis of the required model is a population balance, where single particle kinetics (drying, devolatilization, attrition, etc.), continuum models of heat and mass transfer and the reaction network for biomass conversion are used. The population balance model (PBM) works with the change of certain particle properties in dependency on the property itself. For conversion processes particle mass and particle size were chosen to be considered in the Population Balance Equation.

To build up this aspired complex model, which should be applicable for all thermo-chemical conversion processes (combustion, gasification), it is necessary to take a closer look on the mentioned micro kinetics, what is happening in the current stage of the project. First we focused on the sub-processes of drying and devolatilization by using thermal gravimetric analysis. Now, we work on the particle size dependent shrinking behavior caused by these sub-processes. All effects should be taken into account like this. In the end we need to couple the dynamic population balance model and the existing hydrodynamic model of the gas phase.

Since the construction of the pilot plant has come to an end with the installation of the gas and particle measurement systems a high number of experiments first help to get to know the plant and process parameters under certain conditions and later to validate the modeling approach by comparing experimental data with simulation results.The very sensitive and high quality online measurement systems are able to detect the particle size distribution and the exact composition of the gas phase in the reactor aiming a dynamic monitoring of the process concerning energy yield and hazardous substances.

The higher security and the more efficient processes will help to establish thermo chemical conversion processes of biomass as one of the new energy generating systems we need in the future.







The work is funded by the German Federal Ministry of Science and Education (BMBF) as part of the InnoProfile project NaWiTec.
Dates
University Course Drying 2020
30.03.2020 - 02.04.2020 in Magdeburg
University Course Fluidization Technology 2019
04.11.2019 - 07.11.2019 in Hamburg
News
Appreciation of the research work at the chair with title page of the journal Processes (MDPI)
First project meeting Wigratec InterSpiN
Award for Maciej Jaskulski
Cluster WIGRATEC enters the next round
Arun S. Mujumdar Medal for Prof. E. Tsotsas
Award for best oral presentation
Award for best oral presentation for Christoph Neugebauer on Population Balance Modeling Conference 2018
Faculty Prize 2018
Award for Prof. E. Tsotsas
Honorary Professorship of UCTM, Sofia, for Prof. Tsotsas
University Course Drying 2018
19. March -- 22. March 2018 in Magdeburg
University Course Fluidization Technology 2017
6. - 9. November 2017 in Hamburg
Award on Conference
Best Research Award for Sayali Zarekar on IDS in Gifu, Japan
Award on Conference
Best Poster Award for Christian Rieck at PARTEC 2016 in Nuremberg, Germany
Award on Conference
Best poster award for Vesselin Idakiev at national conference
Award on Conference
Best Presentation Awards on Nordic Baltic Drying Conference 2015
ECCE 2015
27. September - 01. October 2015 in Nice, France
Granulation Workshop 2015
1st July - 3rd July 2015 in Sheffield, UK
University Course Drying 2016
29. March -- 01. April 2016 in Magdeburg
Extension of the Research Training Group 1554
Extension of the funding period for 4.5 years
Award on annual conference
Award for best poster presentation goes to Maryam Dadkhah
Modern Drying Technology Vol. 3
Prof. E. Tsotsas in CES Top 20 Reviewer 2010
Award on Asia Pacific Drying Conference
VDI Ehrenring für Jun.-Prof. Mirko Peglow
University Course Drying 2014
Fundamentals and Applications of Drying Technology