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Wood pellets combustion with rich and diluted air in HTAC furnace

Wood pellets combustion with rich and diluted air in HTAC furnace. Author: Ramona DINU. Paper objective: biomass combustion behavior using high temperature air combustion by burning wood pellets into the HTAC furnace. Measured parameters: pellet’s mass reduction;

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Wood pellets combustion with rich and diluted air in HTAC furnace

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  1. Wood pellets combustion with rich and diluted air in HTAC furnace Author: Ramona DINU

  2. Paper objective: • biomass combustion behavior using high temperature air combustion by burning wood pellets into the HTAC furnace. Measured parameters: • pellet’s mass reduction; • CO2 and CO flue gases concentrations; • NOx emission level; • ignition time; • flame behavior Wood pellets combustion with rich and diluted air in HTAC furnace

  3. Experimental facility (HTAC furnace): Legend: Wood pellets combustion with rich and diluted air in HTAC furnace

  4. Biomass feedstock characteristics Experiments range Wood pellets combustion with rich and diluted air in HTAC furnace

  5. Experimental Results: • Mass loss b) NOx emission level Wood pellets combustion with rich and diluted air in HTAC furnace

  6. Experimental Results: c) CO2 concentration level d) CO concentration level Wood pellets combustion with rich and diluted air in HTAC furnace

  7. Experimental Results: f) Ignition time and flame behavior Oxidant at 1000 ºC and 5% oxygen concentration 5s 10s - ignition 100s 110s 125s - char Oxidant at 1000 ºC and 100% oxygen concentration 0s - ignition 2s 7s 70s 170s - char Wood pellets combustion with rich and diluted air in HTAC furnace

  8. Conclusions: • Pellet mass reduction depends on oxidant temperature; • For lower oxidant temperature 800 ºC, the oxygen concentration has more influence over the mass loss than for the temperature of 1000 ºC; • The level of NOX is proportional with the oxygen concentration and oxidant temperature; • The levels of CO2 and CO are also dependent on oxygen concentration and temperature; • The ignition time is strongly influenced by the oxidant temperature and oxygen concentrations. Wood pellets combustion with rich and diluted air in HTAC furnace

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