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以棉杆为原料,N2作保护气,用管式热解炉对棉杆进行热解的生物油进行成分分析及结构性能分析。用酸度计、毛细管粘度计、石油产品的水分试验器、热重分析(TG-DTG)来确定生物油的结构性能。用红外分析(IR)、气质联用(GC-MS)确定其组分。制备的生物油的水含量2%、pH为3.88、密度为1013.9 kg/m3、运动粘度为2.114 mm2/s;由热重分析结果可知:生物油在140~200℃左右发生一次重量突变,温度200℃以上时达到稳定状态;用红外分析检测出生物油主要有羟基O-H、C=C、C-H、C-O、C=O等官能团;通过GC-MS分析确定的生物油的主要成分包括酸、醇、醛、酮、酚、醚、酯、含氮化合物以及各种复杂的多官能团有机物和少量的含氟、硼、硫、碘的化合物。
Using cotton stem as raw material and N2 as protective gas, composition analysis and structural property analysis of bio-oil pyrolysis of cotton stalk by tube pyrolysis furnace were carried out. The structural properties of the bio-oil were determined using an acidimeter, a capillary viscometer, a moisture tester for petroleum products, and a thermogravimetric analysis (TG-DTG). Its composition was confirmed by infrared spectroscopy (IR) and gas chromatography-mass spectrometry (GC-MS). The prepared bio-oil has a water content of 2%, a pH of 3.88, a density of 1013.9 kg / m3 and a kinematic viscosity of 2.114 mm2 / s. The thermogravimetric analysis shows that the bio-oil undergoes a weight mutation at about 140-200 DEG C, The results showed that the main components of bio-oil determined by GC-MS analysis include acid and alcohol Aldehydes, ketones, phenols, ethers, esters, nitrogenous compounds and various complex polyfunctional organic compounds and a small amount of compounds containing fluorine, boron, sulfur and iodine.