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- W4385667813 abstract "Moderate or intense low-oxy dilution oxy-fuel (MILD-oxy) combustion can synergistically reduce the emissions of CO2 and NOx, and its industrial implementation is carried out under dry and wet recycle modes. In this work, a series of numerical simulations on pulverized coal MILD-oxy combustion under the typical dry and wet recycle modes are performed, aiming at fully evaluating the combustion behaviors affected by the oxidizer O2 concentration (21–30%) under different recycle modes. The results show that increasing O2 concentration weakens the in-furnace flue gas recirculation and promotes the combustion intensity, while a more uniform temperature distribution is obtained under dry recycle mode than under wet recycle mode. The diffusion/kinetics-controlled MILD regime is realized as the O2 concentration increases. Nevertheless, the diffusion effect is enhanced due to the accelerated reaction rate under a high O2 level. The gasification reaction is strengthened with the increased O2 concentration. Compared with wet recycle mode, the burnout of coal char is slowed down under dry recycle mode because of the lower burnout rate. The fuel-NO conversion ratio is significantly reduced with the increased O2 concentration, while wet recycle mode shows more potential in achieving low NOx emission than dry recycle mode. This work is expected to provide new insights into the comprehensive understanding of MILD-oxy combustion." @default.
- W4385667813 created "2023-08-09" @default.
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- W4385667813 date "2023-08-08" @default.
- W4385667813 modified "2023-09-25" @default.
- W4385667813 title "MILD-Oxy Combustion Characteristics of Pulverized Coal Affected by Oxidizer O<sub>2</sub> Concentrations under Dry and Wet Recycle Modes" @default.
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- W4385667813 doi "https://doi.org/10.1021/acs.energyfuels.3c01658" @default.
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