Project Structure

The figure shows the structure of the project with its 5 work packages (WP) and the contributing partners.
Main outcomes of single WPs are added to show the networking.

WPs structure

Definition, the main outcomes, and partners involved in the 5 Work Packages.

The project is co-ordinated by the Centre for Solar Energy and Hydrogen Research, Stuttgart, Germany (ZSW).

WP 1 concentrates on the delivery of a suitable CO2 sorbent bed material, a core component of the AER process. Natural materials (e.g. dolomite, limestone) are characterised in terms of (1) mechanical stability, (2) catalytic activity towards tar reforming, and (3) CO2 absorption capacity during repeated absorption/regeneration cycles. Pre-treatment methods are developed and deactivation mechanisms are investigated in order to improve the performance of the CO2 sorbent.

WP 2 deals with the analysis of the tar formation/decomposition process in the presence of different absorbents in order to further reduce the tar content and to optimise the in situ gas cleaning. Furthermore, natural and commercial catalysts are screened and characterised in terms of attrition and activity. Pre-selected materials are delivered to partners of WP 3 and WP 4.

In WP 3, the multi-feedstock compatibility is investigated by gasification of mineral-rich biomass (e.g. straw) and of humid wood. Due to low gasification temperatures and due to the presence of CaO (increasing the ash melting point), agglomeration of the bed material is not expected. The gas composition is analysed not only with respect to the major compounds (H2, CH4, CO, CO2), but also regarding alkali, tar, and sulphur.

Within WP 4, the 8 MWth plant at Guessing is operated in order to prove the feasibility of scale-up of the AER process and in order to assess the economical aspects of the process. The existing gas engine is modified to be operated with the H2-rich product gas for electricity production. Recorded data will be provided for process analysis, efficiency calculation, and economic analysis, done in WP 5. Therefore, the AER mode will be compared with the normal gasification mode in order to point out the market potential and the cost reduction potential of the new technology.