摘要
兴隆煤分别用甲醇、四氢呋喃和吡啶溶胀处理后，再进行超临界甲苯萃取实验，以考察溶胀预处理对超临界萃取结果的影响。研究结果表明：煤经吡啶或四氢呋喃溶胀处理后，可以明显改善萃取过程转化率及轻组分油的收率；在考察的萃取温度范围（３４０～４００℃）内，吡啶溶胀煤与原煤相比，始终具有较高的萃取转化率和较低的气体产率；增大溶煤比和萃取压力有助于改善吡啶溶胀煤的超临界萃取效果。此外用ＦＴＩＲ和ＳＥＭ对溶胀前后煤的结构变化进行了研究。
Xinglong coal was swollen separately in pyridine, tetrahydrofuran (THF) and methanol, and followed by supercritical extraction with toluene in an autoclave apparatus to investigate the effect of solvent swelling on extraction of coal The results indicated that the swelling pretreatment of coal with THF or pyridine can effectively enhance conversion and lightfraction yield of supercritical extraction process In the investigated temperature range of 340 to 400℃, the pyridine swollen coal showed a much higher conversion and lower gas yield than untreated coal High solventtocoal ratio and high extraction pressure were beneficial for supercritical extraction of pyridine swollen coal In addition, FTIR and SEM of pyridine swollen coal and untreated coal were examined to investigate variations of the coal structure during solvent swelling
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1997年第3期223-226,共4页
Journal of Fuel Chemistry and Technology
基金
国家教委留学回国人员资助
辽宁省博士起动基金
关键词
煤
溶胀
预处理
超临界萃取
煤结构
coal, swelling, pretreatment, supercritical extraction, coal structure
