不同溶剂预处理对神府低变质煤热解特性影响的研究.

Shenfu low-metamorphic bituminous coal(SF) was pretreated with ethanol and hexane and then pyrolyzed at a slow rate in a fixed-bed pyrolysis plant to explore the influence of pretreatment on the pyrolysis characteristics of the coal・ The changes of coal before and after pretreatment and the pyrolysis products were analyzed by X-ray diffractometry (XRD), infrared spectroscopy (FTIR), thermogravimetric (TG), gas chromatography-mass spectrometry (GC-MS) and gas chromatography (GC)・ The results showed that pretreatment could promote the transformation of SF coal into light products and enrich the aromatic compounds in tar. After ethanol pretreatment, the relative percentage of aromatic hydrocarbons in tar increased significantly (up to 47・ 99%), and the relative percentage of phenol in tar after n<-hexane pretreatment increased significantly (up to 30.43%). [ABSTRACT FROM AUTHOR]