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Pyrolysis characteristics, kinetics and evolved volatiles determination of rice-husk-based distiller's grains
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DOI：10.1016/j.biombioe.2020.105525.png)
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Abstract
En 中文
Pyrolysis characteristics, kinetics and evolved volatiles of rice-husk-based distiller's grains (RHDG) were determined by thermogravimetric analysis and pyrolysis (Py)-GC/MS with rice husks (RH) as a comparison. The activation energy of RHDG was 239.84 +/- 48.10 kJ/mol attained by Flynn-Wall-Ozawa method and 241.89. 49.78 kJ/mol by Kissinger-Akahira-Sunose method, much higher than RH and other biomasses. Diesel range organics account for 59.40%, 54.44%, 52.77% of volatiles obtained from RHDG pyrolysis, and C18, C16 were the most abundant components including oleic acids, octadecanoic acid and n-hexadecanoic acid. Pyrolysis evolved volatiles from RHDG had higher atomic H/C and O/C ratios compared with those from RH. The highest content in the volatiles from RHDG was acids (55.66%, 39.29% and 37.04% at 300 degrees C, 400 degrees C and 500 degrees C), which were mainly the evaporation of fatty acids in fermentation residues. Pyrolysis kinetics and evolved volatiles determination provide an in-depth understanding of rice-husk-based distiller's grains pyrolysis behaviors and basis for design and scale-up of pyrolysis process and reactor.
Keywords:
Pyrolysis
Rice husks
Distiller's grains
TG
Py-GC/MS
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