Emissions of NOx from Fast Fluidized Bed Combustor Burning Wheat Straw with Coal


  • K. Shahzad
  • M. Saleem
  • N. A. Akhtar
  • M. Ghauri




Large quantities of biomass residues are produced from the agricultural and wood products industries that could also provide fuel for electricity production and could alleviate the burdens and environmental consequences of waste disposal. Use of biomass in coal-fired power plants results in high efficiencies and fuel diversity. Co-firing biomass and coal is also a viable way to manage the increasing emissions of greenhouse gases and other pollutants from power generating facilities. The effect of operating parameters on the NOx formation and reduction in a fast fluidized bed combustor burning wheat straw and coal are reported in this paper. Combustor is a pilot scale test facility with 6m height and 0.152m diameter at Fluidized Bed Combustion Laboratory University of the Punjab, Lahore. Experimental investigations were done to see the effect of temperature, excess air ratio, total air split ratio etc. on the NOx formation for different fuel blends. Emissions of NOx were found to increase with the increased bed temperature, excess air ratio, Ca/S molar ratio while total air split, higher wheat straw ratio had reducing tendency on the NOx formation.






Engineering Sciences