| IWV-2: | Characterisation of membranes and determination of the properties of membrane materials under operating conditions. ( IWV2 webpages) |
The following are the main topics concerning CO2 separation dealt with at IWV-2:
- Redox systems for N2/O2 separation – chemical-looping combustion As an alternative to membranes, redox systems, which supply pure oxygen for combustion through targeted oxygen uptake and release, are being studied at IWV-2.
- Alkali behaviour under oxyfuel conditions Studies on alkali binding and alkali release and their influence on slags, ashes and deposits in CO2-rich combustion gases. The danger here is that low-melting, highly corrosive carbonates and hydroxides will be formed.
- Behaviour of ferritic and austenitic materials in atmospheres containing CO2 and H2 Operating experience with CO2-cooled nuclear reactors has shown that both low-alloyed and high-alloyed steels can oxidise strongly in atmospheres containing CO2. Steels also show significant carburization, which reduces creep resistance and ductility. Therefore, the oxidation resistance of different steels (ferritic and austenitic) will be measured in CO2 and CO2-H2-H2O test atmospheres. The influence of oxidation on creep behaviour will also be examined. Creep specimens will be loaded in gases containing CO2 and the creep deformation will be compared with the results from tests carried out in air. The range of applications for the different steels will then be determined.
- Technical characterisation of porous and dense membranes A further priority is the characterisation of membranes developed at IWV-1 with respect to permeability, selectivity and flow rate.
The gas compositions on the feed, permeate and retentate side will be determined using a mass spectrometer. The aim is to understand membrane behaviour during the separation process and to describe it with the aid of model calculations.
| Contact: | Dr. T. Markus |
 t.markus@fz-juelich.de | |
| Telephone: 02461 61-4470 |
last change 04.11.2005 | | Print