摘要
《腐殖煤的热降解机理和生烃率》一文对褐煤中甲氧基含量的估计可能偏高,对羟基脱尽时间的估计则偏早,但对此进行的修正并不影响该文关于生烃率的估算结果。各类含氧官能团的相对丰度随煤而异。热降解模型应该与腐殖煤演化道路以及各种产物的产率变化相协调。不应该把简单分子某类化学键的断裂能等同于腐殖煤中同类化学键的断裂能,也不应该强调β键开裂而不顾及实际生烃率等。
Abstract
This paper modifies the structural model of Chinese brown coal proposed bythe author earlier this year.The molecular formula of the new model is CHO, molecular weight 1736u, carbon content 70.51%, ring number 16,ring condensation index 0.294, carbon aromaticity 0.627, hydrogen aromaticity0.292, methane potential 142m/t.The average ring number of the ring clustersis 2, the average H/C atomic ratio of the side chains and bridges is 2.12,the average carbon number of the functional groups containing -CH- is 1.91.Based on the "evolution path" curve obtained from 147 coal samples and the molecular formulas of thermo-degradation products, the author discussesthe thermo-degradation steps of humic coal.
论文详情