Emissions of NOx, SO₂, and CO from Co-Combustion of Wheat Straw and Coal Under Fast Fluidized Bed Condition

Abstract

Fuel diversity and reduction in pollutant emissions are driving the increased utilization of CO₂ neutral biomass. Effects of operating conditions, such as bed temperature; excess air ratio; and secondary to primary air ratio on emissions of NOx, SO₂, and CO for burning different blends of wheat straw and Salt Range coal under fast fluidized bed conditions in a pilot scale test facility, are reported in this study. Emissions of NOx were found to decrease with an increase in wheat straw ratio and secondary to primary air ratio. SO₂ and CO emissions were observed to decrease with an increase in excess air ratio and wheat straw ratio.

Keywords:

• Biomass
• Co-combustion
• Emissions
• Fast fluidization
• Hydrodynamics