“Online corrosion monitoring for the combined combustion of coal and chlorine-rich biomasses in pulverised fuel and circulating fluidised bed systems” OnCord

The OnCord project deals with the development of online corrosion sensors in pulverised (PF) and circulating fluidised bed (CFB) combustion systems in order to use high shares of critical low-grade fuels with coal. During the first half of the project one Columbian, one Russian and one South African coal were identified as suitable coals. One high chlorine straw, one solid residual fuel, one hay and one petcoke were chosen as the low-grade materials for the tests. All fuels have been analysed by standard (proximate, ultimate, heating value, ash composition, ash melting) and suitable advanced (leaching, CCSEM for coals) fuel analysis methods. Two different corrosion sensors (BBS, Savcor) have been prepared and send to the relevant test rigs. 10CrMo9-10, AISI310S and Super304h were chosen as materials for corrosion tests. Co-firing tests have been performed in the CFB small and middle scale showing the influence of different fuels and their blends on the Savcor corrosion sensor. First correlations between the fuel composition and corrosion data was derived. Long-term tests have started in a pulverised fuel power plant (Studstrup, Denmark co-firing straw and coal) including the installation of one online corrosion sensor (BBS) and a long-term material loss probe. Modelling activities dealing with the release of precursor species and a reaction scheme for corrosive species have been started together with additional lab-scale experiments. The University of Stuttgart (USTUTT) is planned to be included as a new partner by the Amendment No.2.     «

The OnCord project deals with the development of online corrosion sensors in pulverised (PF) and circulating fluidised bed (CFB) combustion systems in order to use high shares of critical low-grade fuels with coal. During the first half of the project one Columbian, one Russian and one South African coal were identified as suitable coals. One high chlorine straw, one solid residual fuel, one hay and one petcoke were chosen as the low-grade materials for the tests. All fuels have been analyse...     »