Project meeting of STEP at the site of the company ATS - Agro Trading & Solutions in Hardegsen (Photo: DBFZ)

Biomass gasification

Project ID 03KB014

RegioSWS - Closure of regional cycles of materials in decentralized combined heat and power production in bubbling fluidized bed gasification

Dosing screws (Photo: Umsicht)


  • 01.07.2009 – 30.06.2011


Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT
Osterfelder Straße 3
46047 Oberhausen

Tim Schulzke – project leader
Telephone: +49 (0) 208 8598-1155
E-mail: tim.schulzke‍@‍

Dr. rer. nat. Christoph Unger – project coordinator


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Available only in German.


The project is orderd in five work packages (design of experiments, gasification experiments, conceptual plant design, ash assessment and economical assessment). It deals with the development of a concept for decentralized combined heat and power production from lignocellulosic biomass. The main focus is the improvement of ecological and economic framework conditions compared to present plant concepts.


Aim of the project is the development of a concept for decentralized combined heat and power production from lignocellulosic biomass with an air-blown bubbling fluidized bed followed by a dry gas cleaning consisting of a catalytic tar reforming, cooling, dedusting and a internal combustion engine for power production. The possibility for recirculation of inorganic nutrients from the ash will be assessed.


The conversion characteristics of a bubbling fluidized bed gasification with different fuels like untreated wood chips (as reference fuel), wood chips from short rotation forestry of different types of wood as well as mixtures of wood chips with different types of straw (cereals, rapeseed, maize) is analyzed. Furthermore, the bed agglomeration behaviour is investigated depending on gasification temperature. Based on these results, a concept for a power plant in demonstration scale will be developed.


  • Characterisation of gas quantity and quality of different biomass fuels
  • Conceptual design of power plant and Scale-up
  • Determination of threshold of profitability


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