光电离质谱结合GC/MS研究棉麻织物的热解  

Pyrolysis Study of Cotton and Flax Fabrics by Vacuum Ultraviolet Photoionization Mass Spectrometry and GC/MS

作　　者：王毓[1] 翁俊桀[1] 贾良元[1] 齐飞[1] 周忠岳[1] 

机构地区：[1]中国科技大学国家同步辐射实验室,安徽合肥230029

出　　处：《质谱学报》2015年第1期8-15,共8页Journal of Chinese Mass Spectrometry Society

基　　金：国家自然科学基金(11305175);中央高校基本科研业务费专项资金(WK2310000028)资助

摘　　要：选取生物质类固体废弃物中的棉麻织物作为研究对象,利用热重、同步辐射真空紫外光电离质谱以及气相色谱-质谱联用技术研究其在低压环境中的热解过程。热重分析结果显示,半纤维素和木质素在麻布中的含量高于棉布中的。结合产物的光电离质谱图以及气质联用仪的实验结果对主要产物进行了定性分析,并研究了热解产物随温度的变化趋势,发现500℃下棉布的热解产物最多,而麻布由于含有较多的半纤维素和木质素成分,表现出较宽的热解温区。此外,热解产物中乙醇醛的含量极低,证明了它是纤维素的二次分解产物。The pyrolysis processes of cotton and flax fabrics, which are typical kinds of biomass solid waste, were studied under low pressure by tunable synchrotron vacuum ultraviolet photoionization mass spectrometry （SVUV-PIMS）. The thermogravimetric analysis （TGA） results show that flax fabric has larger proportions of hemicellulose and lignin components compared with cotton fabric. Main pyrolysis products were identified with mass spectra obtained at different photoionization energy together with GC/MS. Temperature-dependent mass spectra of the products show that the most insensitive pyrolysis products of cotton fabric are observed at 500 ℃. Under the effect of hemicellu- lose and lignin components, flax fabric has a relatively wider temperature range. Moreo- ver, hydroxyacetaldehyde （HAA） always exhibited very minor quantity,which confirms that HAA is a secondary pyrolysis product of cellulose.

关 键 词：生物质热解 棉麻织物 热重 同步辐射真空紫外光电离质谱 气相色谱-质谱(GC/MS) 

分 类 号：O657.63[理学—分析化学]