实验测定煤的空气干燥基挥发分。将空气干燥煤样1.004g,在900℃下隔绝空气加热7min后,秤得的煤样质量为0.6942g。已知空气干燥基煤样的水分含量Mad=3.55%,则干燥基煤的挥发分Vad为( )。
2023-09-12
A.16.58%
B.19.26%
C.20.66%
D.27.31%
参考答案:D
B.19.26%
C.20.66%
D.27.31%
参考答案:D
Vad=(1.004-0.6942)/1.004×100%-3.55%=27.31%
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