科研之友
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摘要
An experiment has demonstrated that the sugar and anhydrosugar oligomers as important reaction intermediates produced from various biomass thermochemical processes can be successfully analyzed using high-performance anion-exchange chromatography with pulsed amperometric detection mass spectrometry (HPAEC-PAD-MS). Samples from two biomass thermochemical processes were considered. One was produced from cellulose conversion in hot compressed water (HCW) at 270°C using a semi-continuous reactor system. This system allows for the minimization of secondary reactions of liquid products and facilitates the investigation into the primary reactions. The other was the water-soluble intermediate sample extracted from the char produced from cellulose fast pyrolysis at 250°C in a drop-tube/fixed-bed quartz reactor. To obtain further information on the sugar derivatives, the liquid sample was further analyzed using the CarboPac PA20 column to achieve the separation of the low-molecular-weight compounds. As the first time in the field, this study also detects the isomers of glucose oligomers in the primary liquid products from cellulose conversion in HCW, providing new insights into the cellulose decomposition mechanism in HCW.
- 出版日期2016
- 单位Curtin University
