Water and volatile matter contents lower;

同时水分及挥发物含量降低；

After oxidative polymerization of pith, its volatile matter is decreased from 52.

煤沥青经氧化聚合后，挥发分由52。

With increasing temperature, the yield of volatile matter of vitrinite and fusinite increased.

随热解温度升高，镜质组和丝质组的挥发分收率增加。

Tar yield increases with the increase of volatile matter yield of brown coal in different ages.

焦油产率系随着不同时代褐煤挥发分产率的增多而增加。

Pyrolysis pressure and heating rate showed little effect on the yield of volatile matter of macerals.

热解升温速率和压力对镜质组和丝质组的挥发分收率略有影响。