Fast pyrolysis product distribution of biopretreated corn stalk by methanogen
2014
Wang, Tipeng | Ye, Xiaoning | Yin, Jun | Jin, Zaixing | Lu, Qiang | Zheng, Zongming | Dong, Changqing
After pretreated by methanogen for 5, 15 and 25days, corn stalk (CS) were pyrolyzed at 250, 300, 350, 400, 450 and 500°C by Py–GC/MS and product distribution in bio-oil was analyzed. Results indicated that methanogen pretreatment changed considerably the product distribution: the contents of sugar and phenols increased; the contents of linear carbonyls and furans decreased; the contents of linear ketones and linear acids changed slightly. Methanogen pretreatment improved significantly the pyrolysis selectivity of CS to phenols especially 4-VP. At 250°C, the phenols content increased from 42.25% for untreated CS to 79.32% for biopretreated CS for 5days; the 4-VP content increased from 28.6% to 60.9%. Increasing temperature was contributed to convert more lignin into 4-VP, but decreased its content in bio-oil due to more other chemicals formed. The effects of biopretreatment time on the chemicals contents were insignificant.
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