摘要
为了研究煤中可溶有机质的存在方式与溶出行为,采用石油醚和CS2两种溶剂对徐州镜煤进行分级分次萃取,并以FTIR对各次萃取物进行了分析.结果表明:两种溶剂萃取物重要基团FTIR吸收峰随时间的变化关系均呈波形曲线变化规律;石油醚萃取时溶出的主要是煤中以游离态存在的可溶分子,脂肪族成分和含OH(NH)的成分是其主要产物,且均以中、长链的成分为主;而CS2萃取除溶出游离态的可溶分子外,还可以渗入煤孔隙中溶出孔隙内的可溶分子,且可溶物中有大量的某种特定链长的脂肪族成分存在,而含OH(NH)的成分则以短链的为主.
In order to study the subsist mode and solubilization behavior of small molecule organic compounds in coal,Xuzhou anthraxylous coal was extracted fractionally in succession with petroleum ether and CS2. Extract gained in each fraction was analyzed by FTIR. The results showed that the petroleum ether-soluble matters were dissolved out before 40 h mainly, then the amount of extract increased very slowly; but the yields extracted by CS2 gradually increased except for the jumping at about 40 h. FTIR absorption peaks of some important groups in two fractional extracts showed wave curves against time, but the shape of curves, peak position, peak time and amplitude of two extraction fractions were different. It could provide the evidence for the separation of different compounds in coal.
出处
《煤炭转化》
CAS
CSCD
北大核心
2006年第4期29-33,共5页
Coal Conversion
基金
国家自然科学基金资助项目(50474006)
中国矿业大学科学基金资助项目(B200405).
关键词
煤
石油醚
CS2
分级萃取
FTIR
coal, petroleum ether, CS2, fractional extraction, FTIR
