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- W2068251011 abstract "Effects of carbonization conditions on char reactivity in steam gasification were evaluated by a gravimetric method, using 12 coals varying widely in rank, type and source. The carbonization variables examined were 1.(1) heating rate (5–420K min−1) in steam atmosphere;2.(2) gaseous atmosphere (N2,H2,H2O andCO2);3.(3) incomplete devolatilization in N2 (final temperature 200–800 °C);4.(4) quenching of incompletely devolatilized char; and5.(5) complete carbonization (900–1400 °C).The char reactivity to steam depended on the kind of coal but was almost independent of the carbonization conditions of heating rate, gaseous atmosphere and quenching at temperatures below ≈ 1000 °C. Carbonization above 1100 °C reduced the char reactivity, for example by a factor of 7 to 10 at 1300 °C compared with 900–1000 °C, depending on the parent coal. The char deactivation brought about by increasing carbonization temperature could be correlated with a decrease in the micropore volume of the char, unless graphitization was significant." @default.
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- W2068251011 date "1987-05-01" @default.
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- W2068251011 title "Effects of coal carbonization conditions on rate of steam gasification of char" @default.
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- W2068251011 doi "https://doi.org/10.1016/0016-2361(87)90282-1" @default.
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