摘要
以CS2为溶剂对童亭亮煤进行了按时间段分次取样的索氏溶剂萃取,采用GC/M S对各次萃取物进行了定性分析.结果表明:长链正构烷烃具有十分明显的低碳(约在C12-C22之间,其主峰碳位多变,但多以C16或C17为主峰)、中碳(多以C26或C27为主峰)和高碳(多以C31或C32为主峰)三大系列分布特征;中低碳正构烷烃在溶出特定阶段(约600 h左右)发生奇碳优势分布;长链烯烃的溶出具有后期性和爆发性特点,且与奇碳优势分布的长链烷烃相伴共生,两者可能有着一致的来源物质并在溶出时集中释放;GC/M S可检测小分子主要以三种形态存在于煤结构中,即处于煤表面或大孔隙中的游离态、嵌于微孔之内的微孔嵌入态和囿于大分子网络或交联网络结构之中的网络嵌入态.
Clarain from Tongting （Huaibei, Anhui Province, China） bituminous coal was extracted with CS2 using fractional extraction, and then the extracts were analyzed with GC/MS. The results indicate that long-chain n-alkanes in the CSx extracts obviously show three series of distribution, namely, low-carbon alkane series （between C12-C22, main peaks at C16 or C17）, medium-carbon alkane series （main peaks at C26 or C27） and high-carbon alkane series （main peaks at Ca1 or Ca2）. Odd-numbered carbon distribution is dominant for low and medium carbon n-alkanes at especial stage （about 600 h）. The characteristics of solubilization behavior of long-chain alkenes are upper and explosive. And both long-chain alkanes with odd-numbered carbon distribution and long-chain alkenes present in the same fractional samples. It is likely that both of them come from the same source and dissolve at the same time. The data obtained have enabled three kinds of form of the small molecule components in the coal structure to surface or macropore, micropore-inbuilt state in the macromolecule or crosslinking meshwork. be proposed, namely, free state in the coal micropore and network-inbuilt state in the
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2005年第6期707-711,共5页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(50474066)
教育部科学技术重点项目(104031)
