The behaviour of phosphorus in flue gases from coal and secondary fuel co-combustion |
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| Affiliation: | 1. Institut für Verfahrenstechnik und Dampfkesselwesen (IVD), Universität Stuttgart, Pfaffenwaldring 23, 70569 Stuttgart, Germany;2. E.On Kraftwerke AG, Kraftwerk Staudinger, Hanauer Landstraβe 150, 63538 Groβkrotzenburg, Germany;3. E.On Engineering GmbH, Bergmannsglückstraβe 41-43, 45896 Gelsenkirchen, Germany;4. EnBW Kraftwerke AG, Kraftwerk Heilbronn, Lichtenberger Str. 17, 74076 Heilbronn, Germany;5. EnBW Energy Solutions GmbH, Kriegsbergstraβe 11, 70174 Stuttgart, Germany;1. College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China;2. Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, PR China;3. College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, PR China;4. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China;1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. School of Mechanical Engineering, Pusan Clean Coal Center, Pusan National University, Republic of Korea;2. Key Laboratory for Thermal Science and Power Engineering of Ministry Education, Department of Energy and Power Engineering, Tsinghua University, China;3. Samcheok Thermal Power Plant Division, Korea Southern Power Company (KOSPO), Republic of Korea;1. School of Environment and Natural Resources, Renming University of China, Beijing 100872, China;2. School of Environment, Tsinghua University, Beijing 100084, China |
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| Abstract: | Phosphorus compounds have been reported to be a cause of increased deactivation rates of selective catalytic reduction (SCR) DeNOx catalysts in coal fired power plants. The deactivating behaviour of phosphorus was previously verified during lab and bench scale investigations. The results have been in good compliance with other research activities on similar topics.In order to compare the results of lab and bench scale tests with the actual operating conditions, measurements at two full scale power plants were carried out. The plants co-fired either meat and bone meal or sewage sludge as secondary fuel, while both represent high phosphorus fuels with a considerable amount of volatile fractions.The results of fuel and fly ash analysis showed an increased content of phosphorus during the co-combustion conditions. The analysis of the fine particulate matter showed a high phosphorus concentration on particles smaller than 0.9 μm. A considerable phosphorus concentration on particle fractions smaller than 0.05 μm is a clear indication of the presence of gaseous phosphorus compounds. These are expected to have a high deactivation potential on the SCR catalysts. |
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