[Gasification] German consortium tests new biomass gasification technology, obtains record hydrogen yield

[Philippe Raufast]

""
German consortium tests new biomass gasification technology, obtains record hydrogen yield 

The 'Zentrum für Sonnenenergie- und Wasserstoff-Forschung' (ZSW) in Baden-Württemberg, Germany, announces [*German] that it has developed a new gasification technology for the production of an energy rich gas from biomass that can be used for the generation of electricy and heat, but also for the production of biohydrogen, biomethane and a series of next-generation synthetic liquid biofuels. Following successful initial tests, the regional government of Baden-Württemberg gave the ZSW and its partners the green light to build a 10MW demonstration plant. The new low-temperature gasification technology allows a much wider range of biomass feedstocks to be used, including wet feedstocks.

In a first stage, the integrated gasification-cogeneration plant will be used for the production of green electricity and heat. In a later phase the production of synthetic liquid and gaseous (transport) fuels will be demonstrated.

Thermochemical conversion is a method to transform low-grade biomass types into a gas which can generate electricity in a gaseous-fuel engine or be used in fuel synthesis. Various conversion techniques are currently being developed, including pyrolysis (heating under exclusion of O2) and gasification (heating in special gasification media). The innovation at the ZSW concentrates on the water vapour gasification of biomass in the presence of a CO2 absorbent. The technology is based on an innovative step in a process called 'Absorption Enhanced Reforming' (AER),
http://www.zsw-bw.de/topics/fuel/REGbiomassconversion_en.html
 which was developed in cooperation with the University of Stuttgart and other European partners. During the gasification process, solid biomass is converted into a hydrogen-rich and carbon-oxide-poor fuel gas with a low tar content by means of integrated gas conditioning. Compared to other gasification processes, the AER technique yields gas with a much higher hydrogen content; pilot tests showed yields of up to 70% hydrogen, an unprecedented level.

This hydrogen-rich raw gas can then be made to follow several conversion routes: (1) towards the production of useable gases (biohydrogen, and biomethane that can fed be into the natural gas grid or used as a natural gas substitute in CNG/LPG vehicles) and (2) towards the production of socalled BTL (biomass-to-liquids), synthetic biofuels via a Fischer-Tropsch synthesis of the raw gas:   ""
article continues here :
http://biopact.com/2007/01/german-consortium-tests-new-biomass.html