The results show that in the initial phase of reaction, coal is mainly converted to preasphaltene, asphaltene and a little oil and gas.
研究结果表明：在反应起始阶段，煤主要转化为前沥青烯和沥青烯，有少量油气存在。
With the extend of time, the yield of preasphaltene and asphaltene reaches the maximum and the yield of oil and gas gradually increases.
随反应时间的延长，前沥青烯和沥青烯产率出现最大值，油气产率逐渐增加。
With the extend of time, the yield of preasphaltene and asphaltene reaches the maximum and the yield of oil and gas gradually increases.
随反应时间的延长，前沥青烯和沥青烯产率出现最大值，油气产率逐渐增加。
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