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• W2892060993 abstract "The surface topography, chemical composition, and pore size distributions of low-rank coal treated with RF (Radio Frequency) plasmas using various periods were investigated by the means of SEM-EDS, XPS, and BET to realize the potential of plasma technology for the surface modification of low-rank coal in the selective flotation. Moreover, the wettability and floatability of coal sample were studied after plasma pretreatment. The results showed that a large sum of stripes and polygonal pits were generated, which significantly increased surface roughness, gradually decreased the contents of CC and CH, and increased COO content through the plasma pretreatment. The contact angle of coal sample decreased from 75° to 0° with the increase of treatment time. The flotation tests indicated that the floatability of the low-rank coal sample sharply decreased through the plasma pretreatment. The remarkable differences in the contact angle and the flotation yields between the untreated coal and the treated coal under various treatment periods suggested that the reverse flotation performance of low-rank coal can be efficiently improved through modifying the surface properties of coal by plasma pretreatment." @default.
• W2892060993 created "2018-09-27" @default.
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• W2892060993 date "2018-12-01" @default.
• W2892060993 modified "2023-10-09" @default.
• W2892060993 title "Effects of low-temperature air plasma pretreatment on the surface properties of low-rank coal" @default.
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• W2892060993 doi "https://doi.org/10.1016/j.powtec.2018.09.019" @default.
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