NOx and SO2 emissions from O2/CO2 recycle coal combustion

Sulfur trioxide formation during oxy-coal combustion

“…Monckert et al (2008) Experimental Higher SO3 concentrations for oxy-fired vs. air-fired conditions. Croiset and Thambimuthu (2001); Weller et al (1985); Tan et al (2006) Experimental SO2mass emissions (mg/MJ) lower in recycled oxy-fuel due to SO3 formation and subsequent sulfur retention.…”

Ash and deposit formation from oxy-coal combustion in a 100 kW test furnace

“…In addition, the SO 3 contents are generally higher in the PRB coal ashes than in the Illinois coal ashes, even though the PRB coal contains much lower sulfur than the Illinois coal (Table 1). This is due to higher contents of alkaline metals in the PRB coal, which can intensify sulfur retention in coal ash (Croiset and Thambimuthu, 2001).…”

“…The chemistry of the bulk ash from both combustion modes was found to be similar (Jones et al, 2009). Nevertheless, the oxy-fired ash of certain coals was found to contain a higher content of sulfur than the air-fired ash (Yamada et al, 2000;Croiset and Thambimuthu, 2001;Santos, 2009). It was attributed to enhanced sulfation due to the higher SO 2 and SO 3 concentrations in oxy-firing.…”

Carbon Dioxide Capture and Air Quality

“…NO x emission reduction and underlying mechanisms are fairly well understood for the oxyfuel combustion technology. NO x formation during oxyfuel combustion is found to be lower as thermal NO x formation is suppressed and fuel NO x is reduced (Croiset and Thambimuthu 2001;Buhre, Elliott et al 2005;Tan, Croiset et al 2006;WRI 2007). Overall, the reduction potential for NO x formation of oxyfuel combustion is according to several experiments in the range of 60-76% (Chatel-Pelage, Marin et al 2003;Buhre, Elliott et al 2005;Farzan, Vecci et al 2005;Andersson 2007;Yamada 2007).…”