摘要
用van krevenlen方程求取了平朔气煤显微组分芳香度f_a等结构参数。探讨了镜质组、丝质组和稳定组三种显微组分f_a与C/H原予比的关系。用傅立叶变换红外光谱(FTIR)分析了显微组分的基本官能团。结果表明,各显微组分的f_a与C/H原予比之间有良好的线性关系:f_a=a_i+b_i(C/H)三种显微组分的基本化学结构官能团有所不同:稳定组中有较多的脂肪氢;存在有环烷类及较多的(—CH_2)_n—(n≥4)链烃结构,其中还具有羰基结构C=O和—CH_2—O—CH_3型醚键结构,也有部分[R—(?)—R]聚合体存在。镜质组中的氧主要以酚羟基形态存在,也有类似Ar—O—R的醚键结构。它与稳定组中的氧有着不同的存在形态。
Three purified maceral groups, vitrinites, fusinites and liptinite or exinite, with relatively large quantities were separated from a single coal, Pingshuo gas coal successively by hand-picking, grounding and sieving, demineralized with mixed HCI-HF acid and density gradient centrifugation. Structural parameters such as an aromaticity of each maceral group were calculated by the Van Krevelen's equation. The correlatomic ratio of c/H in the group has been studied. The functional groups and structure of each maceral group were characterized by means of FTIR technique. The results show that (a) the correlation between f_a and C/H can be described by the erprgssion of f_a=b_i^-(C/H)+a_i; (b) the liptinite macerals are aliphatic-rich and have some compounds with more coss-linking and carbonyl structure; vitrinite differs from liptinite in that it contains fewer saturated C—H bonds, more a romatic C—C bonds, more aromatic C—H bonds and more oxygen-containing groups like hindered phenols; Fusinites are an aromatic macerals and have higher covalent cross link density.
