纤维素
乙醇醛
热解
纤维二糖
化学
质谱法
左旋葡糖
四极离子阱
支化(高分子化学)
有机化学
色谱法
纤维素酶
离子阱
催化作用
气溶胶
生物质燃烧
作者
John C. Degenstein,Matt Hurt,Priya Murria,Mckay W. Easton,Harshavardhan Choudhari,Linan Yang,James S. Riedeman,Mark S. Carlsen,John J. Nash,Rakesh Agrawal,W. Nicholas Delgass,Fabio H. Ribeiro,Hilkka I. Kenttämaa
摘要
A fast pyrolysis probe/linear quadrupole ion trap mass spectrometer combination was used to study the primary fast pyrolysis products (those that first leave the hot pyrolysis surface) of cellulose, cellobiose, cellotriose, cellotetraose, cellopentaose, and cellohexaose, as well as of cellobiosan, cellotriosan, and cellopentosan, at 600°C. Similar products with different branching ratios were found for the oligosaccharides and cellulose, as reported previously. However, identical products (with the exception of two) with similar branching ratios were measured for cellotriosan (and cellopentosan) and cellulose. This result demonstrates that cellotriosan is an excellent small-molecule surrogate for studies of the fast pyrolysis of cellulose and also that most fast pyrolysis products of cellulose do not originate from the reducing end. Based on several observations, the fast pyrolysis of cellulose is suggested to initiate predominantly via two competing processes: the formation of anhydro-oligosaccharides, such as cellobiosan, cellotriosan, and cellopentosan (major route), and the elimination of glycolaldehyde (or isomeric) units from the reducing end of oligosaccharides formed from cellulose during fast pyrolysis.
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