For future coal combustion under even increased environmental protection conditions, CFBB in combination with low temperature heat utilization may reach in urban and industrial applications heat recoveries of around 90%! It replaces high valued oil and gas combustion in heating systems as proven process technique and reduces CO2 emission considerably! Beside coal, it may additionally burn carbon containing residues. Fine grained ashes burned at low CFB temperatures may be leached to recover valuable constituents or using the ash as cement component. Storage of raw coal helps to guarantee short to medium time heat storage for overcoming power breakdown of wind or solar power by weather conditions! CFBB05 will certainly create quite a number of valuable ideas in this broad field and contribute to high efficiency power and heat recovery of coal and carbon containing residues! I wish the CFBB05 conference a successful and beneficial event for all the colleagues in July!

At present, climate change is the keyword. In Germany, regenerative energies mean solar and wind power. More complicated solutions like CO2 capture and chemical looping concepts are not even discussed. From my view, what is needed is a discussion of new electricity generating systems including, of course, CFB involving solutions. Costs of implementation and operation of CCS concepts need to be studied. Risk analysis of CO2 storage is another point. People are not aware of the current practice of CO2 storage for enhanced oil recovery. Chemical looping research should include cost saving measures. For example, the pressure drop in a chemical looping system is a direct cost factor. The engineer should work on the minimization of this cost.