Particulate matter formation mechanism in pressurized fluidized bed combustion of various solid fuels

Emission Characterization of Particulate Matters from the Combustion of Pulverized Coals in a Simulated Fluidized Bed Boiler

“…However, in this experiment, the emission factors of anthracite at 700 and 800 °C showed a unimodal distribution with the peak occurring in the micron area, and at 900 °C the emission factors showed a bimodal distribution with the same peak ranges as lignite and bituminous coal. Wang et al 22 and Huang et al 28 found that the mineral composition of coal, especially the volatile content, has a significant effect on the generation of submicron particles,. Anthracite has a high degree of metamorphism and low volatile content (see Table 1 ).…”

“…Specifically, the PM1, PM2.5, and PM10 emission factors of bituminous coal are 2.55–4.08, 2.68–3.99, and 2.74–4.23 times those of anthracite, and the emission factors of lignite are 1.27–2.60, 1.38–2.42, and 1.67–2.54 times those of anthracite, respectively. Naydenova et al 29 and Wang et al 22 explored the characteristics of generated particulate matter from the combustion of different fuels through a laboratory-scale fluidized bed and reported that the particulate matter emission was highly affected by the volatile content of coal. The higher the content of volatile matter, the higher the expansion rate of coke particles, and thus the more easily the coke particles break to generate more particulate matter.…”

“…Under laboratory fluidized bed conditions, Zhang et al 21 burned the mixtures of peat and sludge at different combustion temperatures and investigated the influence of combustion temperature on particulate emission characteristics of peat and sludge co-combustion. Under the condition of pressurized fluidized bed (i.e., in a special pressurized environment), Wang et al 22 burned lignite, bituminous coal, and a mixture of lignite, bituminous coal, and biomass, and reported that coal samples containing more volatile components would produce more submicron particles.…”

“…Under the condition of pressurized fluidized bed (i.e., in a special pressurized environment), Wang et al. 22 burned lignite, bituminous coal, and a mixture of lignite, bituminous coal, and biomass, and reported that coal samples containing more volatile components would produce more submicron particles. In addition, Wang et al 23 selected three particle sizes of coal particles for combustion in a fluidized bed boiler and explored the effect of coal particle size on the particle size distribution of bottom slag.…”