煤直接液化过程中供氢溶剂的组成分析

Composition of Hydrogen Donor Solvent in the Coal Direct Liquefaction Process

采用色谱质谱联用仪(GC-MS)和傅立叶变换离子回旋共振质谱仪(FT-ICR-MS)鉴定了神华煤直接液化过程中供氢溶剂的主要组成结构.GC-MS检测出100多种化合物,结果表明:供氢溶剂主要由正构烷烃和芳烃化合物组成.芳烃化合物中以氢化芳烃为主,尤其是四氢萘系列含量最高,达18.19%.FT-ICR-MS结果显示,供氢溶剂的相对分子质量小于550,表明供氢溶剂主要由复杂的小分子化合物组成.负离子ESI(电喷雾电离,electrospray ionization)FT-ICR-MS鉴定出了N1,N2,N1O1,N1O2,O1和O2等多种杂原子类型,正离子ESI FT-ICR-MS鉴定出了CH,N1,N1O1,O1和O2等杂原子类型.供氢溶剂中氢化芳烃化合物和三、四环含杂原子芳烃化合物响应最强,酚类化合物、碱性和非碱性N1类化合物相对丰度最高.

The main composition of hydrogen donor solvent were characterized by gas chromatography-mass spectrometry（GC-MS）and Fourier transform ion cyclotron resonance mass spectrometry（FT-ICR-MS）.Results show that more than 100 kinds of compounds,mainly normal alkanes of C7-C26 and aromatics,are determined.In particular,the largest content is tetralin,18.19%,which is beneficial to improve the oil yield.The results of ESI FT-ICR-MS reveal that the molecular weight of hydrogen donor solvent is less than 550.Therefore,it is mainly composed of complex and small molecular compounds.Six class species which contain N1,N2,N1 O1,N1 O2,O1 and O2 are identified by negative ion FT-ICR-MS.And the class species of CH,N1,N1 O1,O1 and O2 are found by positive ion FT-ICR-MS.The hydrogenated aromatics and hetero-atom class species with 3-4 circles are dominant.Phenolic compounds and N1 compounds have the highest ion intensity among the species.