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测定生物质裂解油和催化裂解精制油沥青质的平均分子质量和元素含量,计算两种沥青质基本结构单元的平均分子式。通过1H-NMR,13C-NMR波谱计算得到一系列平均结构参数,建立生物质裂解油和催化裂解精制油沥青质的分子模型,并用傅里叶变换红外光谱进行验证。分析结果表明:精制后的催化裂解精制油的沥青质含量减少,分子量降低,含氧官能团明显少于生物质裂解油沥青质,而芳环数目增加。由此可见,经过精制反应后的催化裂解精制油沥青质的分子量变小,氧含量降低,芳香度增加,从而会影响生物质油的品质。
The average molecular weight and elemental content of the biomass pyrolysis oil and the catalytic cracking of the refined asphaltene were determined and the average molecular formula of the two basic units of asphaltene was calculated. A series of average structural parameters were calculated by 1H-NMR and 13C-NMR spectra. Molecular models of biomass pyrolysis oil and catalytic cracking of refined asphaltene were established and verified by Fourier transform infrared spectroscopy. The results showed that the asphaltene content, the molecular weight and the oxygen-containing functional groups of refined refined oil were lower than that of biomass pyrolysis oil, while the number of aromatic rings increased. It can be seen that the molecular weight of refined asphaltene refined by catalytic cracking becomes smaller, the oxygen content decreases, and the aromaticity increases, thereby affecting the quality of the biomass oil.