神华煤直接液化残渣中沥青烯组分的分子结构研究

Study on the molecular structure of asphaltene fraction from the Shenhua coal direct liquefaction residue

对神华煤直接液化残渣的己烷不溶苯可溶物———沥青烯组分———进行了分子结构特性的研究.分析得到其平均分子量为1 387,平均分子式可写成为C101H90.7O3.6N2.从其分子内部结构来看:它的主要结构由多环稠合芳香烃和芳环上存在的烷基取代基组成,其中少量芳香烃已部分饱和,取代基的链长不一,平均为13个碳原子.此外,沥青烯还含有少量氧和氮原子处在环上形成杂环,并存在少量羟基和醚基.

The structure characters of asphahene fraction in the Shenhua coal direct liquefaction residue were studied. Its average molecular weight is 1 387, and average molecular formula is C101H90.703.6N2. So far as character of intra-molecule is concerned, asphahene fraction is made up of polycyclic aromatic hydrocarbon and a series of nalkane chains that are linked with aromatic structure. Some polycyclic aromatic hydrocarbons have been partially hydrogenated and average n-alkane chain has 13 carbon atoms. In addition, asphaltene has a few oxygen and nitrogen atoms that are in aromatic rings and form heterocyclic stucture, some hydroxy groups and ether groups.