Enhancing the quality of bio-oil and selectivity of phenols compounds from pyrolysis of anaerobic digested rice straw.
This study investigated the thermal decomposition characteristics and pyrolytic products of anaerobic digested rice straw (ADRS) by thermogravimetric (TG) and pyrolysis-gas chromatograph/mass spectrometry (Py-GC/MS) analysis. Compared with the raw rice straw (RS), the thermal decomposition temperature of ADRS was shifted to higher temperature zone and the second decomposition zone of cellulose (Toffset(c)-Tpeak) became narrower (14 °C less), which indicated that the composition of rice straw were changed significantly by the anaerobic digestion pretreatment. Py-GC/MS analysis showed that the quality of the bio-oil and the selectivity of pyrolytic products could be obviously improved by anaerobic digestion. The total yields of alcohols, acids, aldehydes, furans, anhydrosugars, and ketones pyrolysis substances decreased, while the yield of phenols increased. The yield of 4-Vinylphenol (4-VP) increased from 29.33%, 8.21% and 5.76% to 34.93%, 12.46% and 7.68% at 330, 450 and 650 °C, respectively, after anaerobic digestion.
['Liang|Jiajin|J|', 'Lin|Yunqin|Y|', 'Wu|Shubin|S|', 'Liu|Chao|C|', 'Lei|Ming|M|', 'Zeng|Chao|C|']
D000693:Anaerobiosis D056804:Biofuels D001709:Biotechnology D008401:Gas Chromatography-Mass Spectrometry D009821:Oils D012275:Oryza D010636:Phenols D013696:Temperature D014866:Waste Products
Anaerobic digested rice straw Thermal decomposition characteristic Pyrolytic product Raw rice straw