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- W2884375267 abstract "Compressed rice hull coke was produced by compressing rice hulls ground to less than 200 µm diameter at 1.22x10 6 N/m 2 and 310˚C with an oxygen deficient atmosphere. The compressed rice hull coke had a 5 cm outer diameter, a 1.5 cm inner diameter and 35 cm length. The density of the coke is 1.2, and, the heat value is 16570 kJ·kg -1 . In this study, 2 kg coke was combusted at the average temperature of 850˚C for 104 min with a maximum temperature of 860˚C. The ash was colored black-grey, and the form remained coke. The ash contained 95.4% silica with 9.2% cristobalite and 86.2% amorphous silica. The occupational exposure limits of respirable fraction of crystalline silica such as cristobalite and quartz in floating dust less than the diameter of 7 µm is 0.025 mg/m 3 ; however, no respirable cristobalite was detected during combustion of the compressed rice hull coke. Cristobalite was not present in floating dust because it melted during the crystallization of amorphous silica to cristobalite." @default.
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- W2884375267 date "2018-06-27" @default.
- W2884375267 modified "2023-09-28" @default.
- W2884375267 title "Crystalline silica in compressed rice hull coke ash" @default.
- W2884375267 hasPublicationYear "2018" @default.
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