Emission characteristics of coal combustion in different O2/N2, O2/CO2 and O2/RFG atmosphere

Comparison of pulverized coal combustion in air and in O2/CO2 mixtures by thermo-gravimetric analysis

“…than those in air environment and the unburned carbon content is higher [10][11][12][13][14][15][16][17]. The larger specific heat of CO 2 compared with N 2 seems to be responsible for them.…”

Heavy metal enrichment characteristics in ash of municipal solid waste combustion in CO2/O2 atmosphere

“…Apart from the reasons mentioned above, the higher CO 2 concentration in atmosphere hindered the development of porosity (Chen et al, 2007, Li et al, 2008. The poorer the porosity was, the bigger the diffusive resistance was.…”

Sulphur impacts during pulverised coal combustion in oxy-fuel technology for carbon capture and storage

“…Their findings have indicated that higher oxygen concentrations resulted in a higher conversion of SO 2 to SO 3 and higher CO 2 concentrations have a diluting effect on SO x levels. Zheng and Furimsky [7] also showed that the driving forces for sulphation reactions were higher than carbonation reactions in the formation of sulphates for silicate and aluminate complexes of Na, K and Ca and oxide complexes of K, Na, Ca and Mg. [14] Laboratory Fly ash size distribution and elemental composition, no recycle -Significantly higher S, Na, K content in 0.1-0.5 mm fly ash -higher mass fraction of -0.1 mm ash particles under oxyfuel conditions [33] Laboratory Recycle ratio and gas composition in a fluidised bed -Increased combustion efficiency with higher recycle rate, leading to an increase in SO 2 production [12] Corrosion in the radiative and convective passes of the furnace has long been associated with molten slags and solid ash deposition. The formation of low melting metal sulphates (Na, K, Ca, Fe) has been linked to corrosion mechanisms by providing an initial "sticky" surface for the adhesion of other solid particles and by combining in slag form and reacting directly with the wall surface [26].…”