摘要
利用气质联用和核磁共振光谱对不同种类生物油的化学组成结构进行了对比分析。气质联用分析表明,由于不同种类生物质原料化学组成的差异,导致不同种类生物油主要类别物质含量存在较大差别,有机酸含量较高的是蔗渣热解油,醛酮类物质含量较高的是蔗渣和稻草热解油,芳香类物质含量较高的是玉米芯和松木热解油,而脱水糖含量较高的是稻草和松木热解油。核磁共振碳谱分析表明,稻草热解油含有最多的烷基碳和羰基碳,而松木和蔗渣热解油分别含有最多的芳香碳和羧基碳。氢谱分析表明,烷氢和糖羟基氢含量最高的分别是蔗渣和稻草热解油,酚羟基氢和芳氢含量最高的是松木热解油。由于不同种类生物油内部官能团的差异,导致其物理性质存在较大差异。
The chemical compositions and structures of different kinds of bio-oils were compared by gas chromatography/mass spectrometry（GC/MS） and Nuclear Magnetic Resonance Spectroscopy（NMR）.It was shown that contents of main kinds of compounds were significantly different in different kinds of bio-oils because of the discrepancies of chemical compositions of biomasses.Bio-oils from corncob and pine contained more aromatics,and that from straw had more anhydrosugars,aldehydes and ketones,while that from bagasse contained more organic acids,aldehydes and ketones.13C-NMR spectra revealed that bio-oil from straw contained the most alkyl carbon and carbonyl carbons,while that from pine and bagasse contained the most aromatic carbon and carboxylic carbon,respectively.From the 1H-NMR spectra,it was observed that the most alkyl hydrogen and sugar hydroxyl hydrogen were found in bio-oil from bagasse and straw,respectively.While the most phenolic hydroxyl hydrogen and aromatic hydrogen both existed in the bio-oil from pine.The discrepancies of functional groups of different kinds of bio-oils resulted in the differences of physical properties.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2011年第10期746-753,共8页
Journal of Fuel Chemistry and Technology
基金
国家高技术研究发展计划(863计划
2007AA05Z456)
