煤油共炼残渣性质分析

采用元素分析、工业分析、热重分析、X射线衍射、扫描电镜、红外光谱等手段对煤油共炼残渣的组成、微观结构、官能团进行分析表征,并通过红外谱图的分峰拟合对官能团含量进行半定量计算。结果表明:残渣的有机物由具有片层堆积结构碳质颗粒组成,无机物由煤油共炼催化剂和煤中的无机矿物质组成;残渣颗粒粒径呈10μm和2μm的两级分布,颗粒呈整体无序、局部有序的分布状态。分别采用工业分析和热重分析得到挥发分、固定碳和灰分的含量,两组数据一致:残渣的氢键中羟基自缔合结构占约47.5%;脂肪氢中亚甲基结构占约64%;含氧官能团主要以碳氧键和羰基形式存在,含有微量的硅氧键,没有羧基;芳香结构中烷基侧链取代基较多,五取代氢的芳香结构只占约4.5%。

PROPERTIES ANALYSIS OF RESIDUE FROM COAL-OIL CO-PROCESSING

The composition, microstructure and functional groups of coal-oil co-processing residue were analyzed by elemental analysis, industrial analysis, thermogravimetry, X ray diffraction, scanning electron microscopy and infrared spectroscopy. The content of functional groups was semi-quantitatively calculated by the peak fitting of infrared spectroscopy. The results showed that the organic matter of the residue are composed of lamellar stacking carbon particles, the inorganic matter of residue are composed of coal-oil co-processing catalyst fines and inorganic minerals in coal. The diameters of the residue particles are distributed in around 10 μm and 2 μm. The particles distribute disorderly in integer area and orderly in local area. Volatile, fixed carbon and ash contents were determined by industrial analysis; the results are close to that of thermogravimetric analysis. The hydroxyl self-associating groups in the hydrogen-bond in the residue account for 47.9%, the methylene groups of the aliphatic-hydrogen account for 64%. The oxygen-containing functional groups exist in the form of carbon oxygen bonds and carbonyl groups mainly, and contained tiny silicon oxygen bonds, but without carboxyl group. The aromatic groups contain more alkyl-side-chain substituents, while the aromatic groups with five substituted hydrogen account for only 4.5%.