Journal
ACS OMEGA
Volume 4, Issue 5, Pages 8747-8757Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.8b03681
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Funding
- Australian Research Council
- Australian Paper
- Carter Holt Harvey
- Orora
- Circa
- Norske Skog
- Visy through the Industry Transformation Research Hub grant [IH130100016]
- Australian Synchrotron [10726, 12760]
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Thermo-catalytic conversion of cellulosic feed-stock, such as lignocellulose, to platform chemicals offers a renewable alternative to fossil-based chemicals. Mechanistic insights behind thermochemical conversion of lignocellulose would facilitate thermo-catalytic process development for biobased chemicals. This study employed synchrotron-based Fourier transform infrared (FTIR) microspectroscopy to investigate chemical changes in acid-catalyzed cellulose and lignocellulose and glucose during pyrolysis. Major changes in glucose occurred at 200 degrees C, where it underwent reactions including ring opening and tautomerization. Acid treatment did not change the molecular structure of cellulose but disrupted the lignocellulose network. The observed synchrotron FTIR spectral features provided evidence for acceleration of catalytic dehydration of cellulose and lignocellulose to levoglucosenone and furans. Catalytic passivation of alkali and alkaline earth metals in lignocellulose was also observed at low acid concentration.
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