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conferenceseries
.com
Volume 8, Issue 5 (Suppl)
J Bioremediat Biodegrad, an open access journal
ISSN: 2155-6199
Biofuels Congress 2017
September 05-06, 2017
September 05-06, 2017 | London, UK
Biofuels and Bioenergy
6
th
World Congress on
Influence of ultrasound-assisted extraction on volatiles and residues in wood pyrolysis
Zhenyu Wang, Lijie Qu, Jiali Zhang, Zhengbin He, Songlin Yi
and
Jun Mu
Beijing Forestry University, PR China
E
ucalyptus was used as the raw material for treatment with ultrasound-assisted extraction (UAE) to study the ultrasonic
effects on volatiles emitted and residues produced during pyrolysis. A swept ultrasonic cleaner with a frequency of 40
kHz and an intensity of 360 W was applied to samples at 60°C for 30 minutes. The characteristics of the ultrasound-treated
samples were then compared with those of Soxhlet-extracted and untreated biomass by TG-FTIR and SEM. The results showed
both mechanical and chemical effects of ultrasound played a significant role in efficiently altering biomass characteristics.
In thermogravimetric analysis, UAE samples showed the highest maximum mass loss rate (-52.1%/min) with the lowest
temperature (378.4 °C), while the other two samples presented similar trends to each other with lower maximum mass loss
rate. Volatile profiles obtained by TG-FTIR indicated that CO and methanol components were mainly influenced by extraction,
while CO
2
, CH
4
, and formic acid responded more strongly to the effects of ultrasound. After UAE, an increase in CO, CH
4
and decreases in CO
2
and formic acid were produced during pyrolysis. From SEM images, the fracture of pit membranes
clearly showed the mechanical effects of ultrasound, which accounted for the significant enhancement of extraction of valuable
ingredients.
wangzhenyu1992@126.comJ Bioremediat Biodegrad 2017, 8:5(Suppl)
DOI: 10.4172/2155-6199-C1-009