User: Guest  Login
Document type:
Report / Forschungsbericht 
Author(s):
Frandsen, F.; Fendt, S.; Spliethoff, H. 
Title:
A continuation of 20 years of EU-Funded research on fuel characterization, ash and deposit formation, and corrosion 
Abstract:
Heating and cooling are responsible for approximately half of EU’s final energy demand, while biomass is currently responsible for more than 90% of all renewable heat. The goal is to increase share of biomass-based technologies, in the European heat market, from 11% in 2007 to about 25% in 2020 [RHC-Platform, 2014]. Combined Heat and Power (CHP) from biomass is a suitable technology for medium- and large-scale units, where many utility and industrial applications can be found, especially in Scandinavia. The main challenge for efficient CHP and high temperature steam production from biomass are ash-related problems. Corrosion due to the difficult ash composition of biomass limits both steam temperature and efficiency. By solving these issues, large-scale boilers offer a huge potential for efficiency increase and emission reduction, during CHP generation at costcompetitive and environmental friendly conditions. In order to reach these goals, and to enable a secure and nearly carbon neutral heat and power generation, recently, the Biofficiency proposal, was granted under Horizon2020, aiming to: • Develop next generation, biomass-fired CHP plant, increasing the steam temperatures up to 600°C, at medium to large scale (10 to 200 MWth). • Increase the efficiency of CHP plants by elevated steam temperatures through solving and understanding of ash-related problems – slagging, fouling and corrosion. • Reduce emissions – i.e. CO2, particulates, CO, NOX, and SO2 – by efficiency gain, reduction of impurities and by intelligent plant design. • Broaden the feedstocks for pulverized fuel (PF) and fluidized bed (FB) power plants, using pre-treatment methods with focus on the reduction of harmful, inorganic elements: Cl, S and the alkali metals. • Prevent power plant damage due to high-temperature Cl-induced corrosion. • Reduce costs for utilities due to increased efficiency, lowered emissions and fuel consumption, decreased number of outages and maintenance due to handling of ash-related problems. • Optimize biomass blending (e.g. wood & sewage sludge) in order to reduce slagging, fouling and corrosion propensities by the adjustment of ash chemistry, enabling new ash utilisation options. • Develop better furnace materials. • Widen ash utilization and nutrient recirculation, by detailed ash analysis in terms of chemistry and physical properties. When preparing the proposal, a state-of-the-art note on the above issues was written, and this paper contains a brief outline of the previous EU-based activities on these issues, which led to the outline and formulation of the Biofficiency proposal. A complete review of 20 years of EU-funded research on fuel characterization, ash and deposit formation, corrosion, ash utilization is out of the scope, since it would require a substantial number of pages and details, but the paper serves more like a resume of the activities and, perhaps, a forerunner for a more detailed peer-view paper on this issue. 
Contracting organization:
Technische Universität München 
Year:
2016 
TUM Institution:
Lehrstuhl Energiesysteme 
Format:
Text