Günter Scheffknecht

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An important source of polycyclic aromatic hydrocarbons (PAHs) in residential areas, particularly in the winter season, is the burning process when wood is used for domestic heating. The target of this study was to investigate the particle-phase PAH composition of ambient samples in order to assess the influence of wood combustion on air quality in(More)
Due to deregulated energy market conditions and the planned extension of the UCTE power system towards Eastern Europe, as well as towards the Middle East and North Africa to close the so called “Mediterranean Ring”, the oscillation damping behaviour of the UCTE power system is gaining more and more in importance. Within the present paper, the oscillation(More)
The 1999/31 Elemental Carbon Directive sets strict rules on the disposal of untreated municipal solid waste in the European Union countries and forces a reduction of the biodegradable quantities disposed off to landfills up to 35% of the amount produced in 1995 in the coming decade. More environmentally friendly waste management options shall be promoted(More)
Due to its large reserves, coal is expected to continue to play an important role in the future. However, specific and absolute CO2 emissions are among the highest when burning coal for power generation. Therefore, the capture of CO2 from power plants may contribute significantly in reducing global CO2 emissions. This review deals with the oxyfuel process,(More)
A new concept is proposed for combined fermentation (two-stage high-load fermenter) and gasification (two-stage fluidised bed gasifier with CO2 separation) of sewage sludge and wood, and the subsequent utilisation of the biogenic gases in a hybrid power plant, consisting of a solid oxide fuel cell and a gas turbine. The development and optimisation of the(More)
Applying the oxy-fuel process to a circulating fluidized bed boiler combines potential advantages regarding the CO2 capture efficiency with well-known CFB benefits such as fuel flexibility and in-situ desulfurization. The SO2 formed during the combustion of coal can be captured by introducing limestone as sorbent into the combustion chamber. The combustion(More)
Oxy-fuel combustion of coal in a circulating fluidized bed was investigated at the institute of Combustion and Power Plant Technology (IFK) at the University of Stuttgart, Germany. Experiments were carried out at the 150 kWth pilot scale CFB facility. Combustion tests included both air and oxy-fuel combustion with recirculation of flue gases. As oxy-fuel(More)
A pumped storage plant is one of the fastest reacting types of power generating units within power systems. Typically, the desired value curves for the power output during set point changes are provided in form of non-smooth ramp shaped curves. These cannot be followed exactly by the plant process due to its physical limitations. Resulting oscillations of(More)