Abstract: Thermogravimetry analysis (TG) coupled with differential scanning calorimetry (DSC) was applied,in the nitrogen background,to analyse dry basis,air dried basis and as-received basis of five kinds of oil shale as well as purified water.First of all,one of the oil shale samples was used in thermogravimetry analysis with different heating rate,the heating rate of 3℃/min,10℃/min and 20℃/min, curves were plotted to illustrate the relationship between energy consumption for per unit mass of water evaporation and temperatures.Results show that the energy taken in evaporation process for normal state water remains constant,which is about 2321kJ/kg.The different stages of curves of air dried basis and as-received basis represent the evaporation processes of different moisture in oil shale.According to the mechanism of moisture in oil shale,we get the average energy consumption of the external water,internal water,surface water and absorbed water under three different kinds of heat rate.Compared with normal state water,the ratios are 1 to 1.18 to 1.95 to 1.60 to1.97、1 to 1.1 to1.84 to 1.58 to 1.90、1 to 1.14 to 1.88 to 1.59 to 1.93.It was proven that heating rate almost has no effect on energy consumption of dehydration.Thermogravimetry analysis was applied in the other four kinds of samples with the rate of 3℃/min, the calculation results show that the average energy consumption of different kinds of oil shale is basically the same.

Key words: oil shale, differential scanning calorimetry, energy consumption, thermogravimetry analysis, dewatering

摘要： 在氮气吹扫作用下利用TG-DSC联用方法对5种油页岩样品的收到基、空干基、干燥基和纯水进行实验,首先对其中一种油页岩样品采用不同升温速率进行热重实验分析,升温速率分别为3℃/min、10℃/min和20℃/min,得到单位质量水分析出所需要的能耗曲线,实验结果表明常态水析出所需能量基本保持不变,约为2321kJ/kg。收到基和空干基能量曲线中的不同阶段表征油页岩中不同水分析出过程。根据油页岩中水分的存在形式,可得三种升温速率下油页岩中外在水、内在水、表面水和吸附水析出所需平均能耗,与常态水的平均能耗比分别为1:1.18:1.95:1.60:1.97、1:1.10:1.84:1.58:1.90和1:1.14:1.88:1.59:1.93,表明升温速率几乎对脱水能耗没有影响或是说影响不大。进而对其他4种含水量接近的油页岩样品以3℃/min的升温速率进行相同热重分析,计算结果表明含水量接近的不同种类油页岩析水能耗也基本相同。

关键词: 油页岩, 差热, 能耗, 热重分析, 脱水