期刊
PROCEEDINGS OF THE COMBUSTION INSTITUTE
卷 34, 期 -, 页码 2347-2354出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.proci.2012.05.077
关键词
Biomass; Poplar; Pyrolysis; SVUV photoionization mass spectrometry
资金
- National Basic Research Program of China (973 Program) [2012CB719701]
- Natural Science Foundation of China [50925623]
- Chinese Academy of Sciences
Pyrolysis is one of the most important methods to convert biomass into biofuel, which is a potential substitute for fossil fuel. The pyrolysis process of poplar biomass, a potential biofuel feedstock, has been studied with tunable synchrotron vacuum ultraviolet (SVUV) photoionization mass spectrometry (PIMS). The mass spectra at different photon energies, temperatures, and time-evolved profiles of selected species during poplar pyrolysis process were measured. Our results reveal that poplar is typical of hardwood according to its relative contents of three lignin monomeric precursors. As temperature increases from 300 to 700 degrees C, the overall intensities of pyrolysis products decrease due to the gas-phase cracking. Observed intensities of syringyl and guaiacyl subunits of lignin in poplar at low temperature present different trends: the intensities of syringyl subunits of lignin undergo an increase firstly and then a decrease, whereas those of guaiacyl subunits of lignin show decrease continuously. Time-dependent data demonstrate that hemicellulose pyrolysis is faster than lignin in poplar. This work reports a new application of SVUV PIMS in biomass pyrolysis, which performs very well in products analysis. (C) 2012 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
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