摘要
采用离子液体1-丁基-3-甲基咪唑四氟硼酸盐([BMIm]BF4)对中国神华煤进行直接液化前的溶胀处理,通过对溶胀度的测定及不同条件下溶胀煤样的直接液化实验,探讨了离子液体[BMIm]BF4在煤溶胀预处理方面的应用.结果表明,离子液体[BMIm]BF4溶胀预处理能破坏煤结构中的弱共价键,使煤的溶胀度获得了显著提高,进而改善了其液化性能,提高了煤的直接液化转化率和油气产率.在溶胀条件方面,随溶胀时间的增加,煤溶胀度和液化转化率提高;而温度对煤溶胀度和液化转化率的影响较复杂,存在一个合适的溶胀温度范围,在此温度之上,溶胀度和液化转化率随温度的升高而降低.而且使用过的[BMIm]BF4可以回收循环使用.
A common ionic liquid of 1-butyl-3-methylimidazolium tetrafluoroborate （[BMIm]BF4） has been used as swelling solvent to swell Shenhua coal for pretreatment of the coal liquefaction. The swelling ratio and coal liquefaction have been experientially measured, by which the investigation of the application of the [BMIm]BF4 on swelling pretreatment of coal was carried out. The results show that the swelling ratio of the [BMIm]BF4 swelled coal is remarkably more than that of the coal without pretreatment in the solvent of methanol. The swelling pretreatment makes the weak covalency bonds of coal broken, so as to make the conversion ratio and the ratio of oil and gas product improved in the process of the swollen coal liquefaction. The swelling ratio and total conversion rate of Shenhua coal increased with increasing of the swelling time. The effect of operating temperature is complicated because there is a suitable temperature difference. Above that temperature, the swelling ratio and total conversion rate decrease with increasing of temperature. And the [BMIm]BF4 can recycled.
出处
《煤炭转化》
CAS
CSCD
北大核心
2010年第2期35-38,共4页
Coal Conversion
基金
辽宁省重点实验室建设项目课题(2008S128)
