CEM - Abstract

Abstract Title: Sampling of Dioxins and Carbon Dioxide
Presenter Name: Mr Richard Münchmeyer
Company/Organisation: OPSIS AB
Country: Sweden

Abstract Information :

New regulations such as the European “Waste Incineration BAT Conclusions” call for long-term sampling of "polychlorinated dibenzo-p-dioxins and -furans" (PCCD/F), but let's call it "dioxins" for simplicity. An isokinetic sample is taken from the duct and dioxins are trapped in an absorbing material. Special material has to be used and the sampler which effectively is an advanced pump, needs to be controlled. The Measurement Process Such a product is now available from OPSIS – the DX100. It consists of a sampling unit mounted directly on the duct. It is followed by a dryer, a volume meter and electronics to carefully control an ejector pump sitting at the end of the extraction line. This ensures that the sample is taken at the same rate as the gas passes in the duct. There is a container filled with absorption material inside the sampling unit, and that is where the dioxin sample is trapped during operation. After a set sampling period, typically 2-4 weeks but it can be up to 8 weeks, the container is swiftly exchanged for a new one and then sent to a laboratory for analysis of the dioxin content, while the new container allows continued sampling. The volume meter records the total amount of gas that has been sampled, which in combination with the sampling time and the lab result gives the average dioxin concentration in ng/m3N. Cost-effective Sampling of CO2 Too The DX100 is also offered with an option to capture CO2. This is used to determine the percentage of fossil CO2 in the emissions. This can be of major interest to plant operators burning mixed fuels. CO2 emissions of fossil origin might be taxed much higher than CO2 emissions originating from biomass, and in lack of well-controlled mixing rate, the taxation authorities might ask for a higher-than-necessary tax. The option ensures that the CO2 gas in the sample is absorbed in another container with another absorption material. After a set sampling time, the CO2 sample is sent to a laboratory for isotope analysis. This is of interest since the carbon in the CO2 originate from the fuel and therefore reveals the fuel composition.