Cold DeNOx development for oxyfuel power plants |
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| Authors: | Florian Winkler Nicole Schoedel Hans-Jörg Zander Roland Ritter |
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| Institution: | 1. Linde AG, Engineering Division, Dr.-Carl-von-Linde-Str. 6-14, 82049 Pullach, Germany;2. Linde-KCA Dresden GmbH, Bodenbacher Str. 80, 01277 Dresden, Germany;1. Fuels, Engines, and Emissions Research Center, Oak Ridge National Laboratory, 2360 Cherahala Blvd., Knoxville, TN 37932, United States;2. Chemical Engineering Department, University of Michigan, 2300 Hayward St., Ann Arbor, MI 48109-2136, United States;1. North Carolina State University, 2401 Stinson Drive, Box 8202, Raleigh, NC 27695, United States;2. Triangle Universities Nuclear Laboratory, 116 Science Drive, Box 90308, Durham, NC 27708, United States;3. National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, United States;4. Harvard University, 17 Oxford St., Cambridge, MA 02138, United States;5. National Institute of Standards and Technology, 100 Bureau Drive, Stop 8461, Gaithersburg, MD 20899, United States;6. University of North Carolina at Chapel Hill, 120 E. Cameron Ave., CB #3255, Chapel Hill, NC 27599, United States;7. University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801, United States;1. Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, United States;2. Department of Medicine, University of Pittsburgh School of Medicine, United States;3. Department of Surgery, University of Pittsburgh School of Medicine, United States |
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| Abstract: | Flue gas purification is a necessary method to avoid emission of sour gases like SOx and NOx into the environment. Another important aspect is the zero CO2 emission from coal-fired power plants. Oxyfuel technology is one of the processes to reach this goal. LINDE KCA Dresden in cooperation with Vattenfall Europe is operating a pilot plant producing liquefied CO2. Product specification and material requirements make flue gas purification for the removal of SOx and NOx unavoidable. The new oxyfuel technologies offer new process conditions for flue gas purification which are not available at atmospheric conditions.At Linde laboratories, catalytic and non-catalytic DeNOx and DeSOx processes have been screened for oxyfuel application. After first feasibility studies, laboratory experiments and economic evaluations, it was decided to develop a process based on wet scrubber systems to remove NOx from flue gas, simultaneously producing ammonia nitrites which can be thermally decomposed into nitrogen in a second step. After demonstration of the single process steps on laboratory scale, a pilot scrubber was erected and commissioned in 2010 at Schwarze Pumpe Oxyfuel Pilot Plant. In September 2010, the successful completion of the pilot tests demonstrated the NOx removal efficiency of this technology. The data from the pilot plant tests have been used to finalise a kinetic model describing the NOx absorption behaviour regarding NOx removal rate and nitrite selectivity for demonstration of plant scale up. This DeNOx-process is now marketed under the name “LICONOX”. |
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