Grass for Power Generation

Grass for Power Generation
Johanes Judex, PSI April 2010

Hello everybody,

I have learned from this gasification network since three years and I learned a lot.
Thank you all, for sharing much information.

Most of the time I stayed in the background but now I want to post the link to my PhD thesis I did at the ETH Zuerich and Paul Scherrer Institut in Biomass Gasification.

I am not a native english writer so you will excuse the formal mistakes I made. Anyway I did my best to present:

Grass for power generation -- extending the fuel flexibility for IGCC power plants

The outline of the work is as follows:

The fuel: natural native grass (extensive), wood
The gasifiers: bubbling fluidised bed (5-10kW) & single pellet reactor
The sampling: continuous wet scrubber
The diagnostik: GC, GC/MS, ICP-OES, TC, Karl-Fischer, Draeger tubes, SID
The parameters: Lambda, temperature, bed material
The goal: Stable operation, product gas clean enough for gas turbine applications
The result: you have to read it and decide for yourself

Well, I hope there is something for everybody in this work.



Hydrothermal Carbonization

Hydrothermal Carbonization, Markus Antonietti, Max Planck Institute, of Colloids and Interfaces,
has developed a method of making coal from biomass using an autoclave system. The process is suitable for web biomass and the main byproduct is water, not carbon dioxide. It seems suitable for wet biomass that is difficult to combust. The process is being studied extensively in Germany.


MDE Dezentrale Energiesysteme GmbH

C. Van Milligen, October 2002

The October 2002 edition of Diesel & Gas Turbine Worldwide magazine on page 10 has an article on a demo plant in Eckernforde, Germany, by Sr. Franz Hirschbichler. This plant is producing wood gas from chips, cleaning the gas and fueling an internal combustion engine. The use a MDE turbocharged v12, 1.83 L/cyl, S1 Leanburn gas engine adapted to wood gas.

There seems to be some additional work required to get the plant operating as planned although they consider the demo to have proved the concept of wood gas for a CHP plant.

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