Journal
FUEL
Volume 267, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2020.117302
Keywords
Hemicellulose; Pyrolysis; Structural evolution; Two-dimensional perturbation correlation infrared spectroscopy
Categories
Funding
- National Nature Science Foundation of China [51622604]
- Advanced Newton Fellowship [51861130362]
- National Key Research and Development Plan of China [2018YFB1501403]
- Fundamental Research Funds for the Central Universities
Ask authors/readers for more resources
To gain an improved understanding of the hemicellulose pyrolysis mechanism, two-dimensional correlation infrared spectroscopy (2D-PCIS) was employed to analyze the functional group evolution in xylan chars between 200 and 600 degrees C, and through combination with the obtained volatiles releasing properties. Simultaneously, the pathway of xylan decomposition was deduced to illustrate the pyrolysis mechanism. The depolymerization and ring-opening reactions of xylan started at 200 degrees C. After that, it was mainly xylan matrix degradation reaction to form char structure which mainly consisted of phenyl rings and oxygen-containing cyclic compounds with aliphatic chains. With temperature increasing (300-450 degrees C), the decarbonylation reaction, removal of C=C and fatty chains reactions were intensified and the molecular structures of xylan char reconstructed to form fusedring compounds on the order of 1 x 2 and 2 x 2 through condensation. Dehydrogenation and polycondensation reaction of xylan increased at higher temperature (450-600 degrees C). The char structure was composed of high-order fused-ring compounds, and the production of H-2 and CH4 increased greatly.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available