| Paper Name |
Experimental and kinetics studies on the evolution and effects of ash film during pulverized coal char combustion |
| Author |
Liu Siqi, Niu Yanqing*, Wen Liping, Kang Yaqian, Wang Yufeng, Wang Denghui, Hui Shi’en |
| Publication/Completion Time |
2021-10-13 |
| Magazine Name |
Combustion and Flame |
| Vol |
233 |
| Related articles |
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| Paper description |
The char reactivity loss during the burnout stage is closely related to the effects of ash minerals, which show complex transformation behaviors (ash vaporization, ash film, and ash dilution). To assess the impact of ash behaviors, we computed the char consumption characteristics in a 21%O-2/79%N-2 environment using the Char Burning and Particulate Matter Kinetics (CBPMK) model with a user-design allocation of the ash film and dilution. Regretfully, the ash film fractions have not been experimentally studied due to the irregular ash structure and the high combustion temperatures. On basis of the research on ash formation mechanism, this paper aims to provide appropriately measured ash film fractions of chars as a function of carbon conversion ratio for further development of the kinetic model. The ash film fraction F increases exponentially with carbon conversion ratio N, and their relationship is summarized as F = aN(23.66)Y (00.8), the relative deviations from the normal carbon conversion ratio are more than +10% when ignoring ash film and -20% when ignoring ash dilution. |
(创新港)
