Tipeng Wang

Tipeng Wang; Xiao-ning Ye; Jun Yin; Qiang Lu; Zongming Zheng; Changqing Dong

The study investigated the effects of methanogen pretreatment on pyrolysis behaviors of corn stalk (CS) by using Py-GC/MS analysis and thermogravimetric analysis. Results indicated that biopretreatment changed considerably the pyrolysis behaviors of CS from four weight loss stages to two weight loss stages. Increasing biopretreatment time from 5 days to 25 days enhanced the kinds and contents of chemicals in volatile products. In pyrolysis products, the contents of sugars, linear ketones and furans decreased from 1.43%, 12.60% and 7.38% to 1.25%, 10.22% and 3.25%, respectively, and the contents of phenols increased from 15.08% to 27.84%. The most content change from 6.83% to 13.63% indicated that methanogen pretreatment improved the pyrolysis selectivity of CS to product the 4-VP, but it was disadvantageous to 5-hydroxymethyl furfural, levoglucose and furfural. The changes of chemical compositions and structure of CS after biopretreatment were the main reason of the differences.

Tipeng Wang; Xiao-ning Ye; Jun Yin; Zaixing Jin; Qiang Lu; Zongming Zheng; Changqing Dong

After pretreated by methanogen for 5, 15 and 25 days, 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 5 days; 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.

Tipeng Wang; Xiaochen Dong; Zaixing Jin; Wenjing Su; Xiao-ning Ye; Changqing Dong; Qiang Lu

To utilized biomass for optimum application, sweet potato vine (SPV) was studied on its pyrolytic characteristics by TGA and Py-GC/MS analysis as a representative of biomass with low lignin content and high extractives content. Results indicated that lignin, cellulose, hemicellulose and extractives contents were 7.85 wt.%, 33.01 wt.%, 12.25 wt.% and 37.12 wt.%, respectively. In bio-oil, sugars content firstly increased from 8.76 wt.% (350 °C) to 13.97 wt.% (400 °C) and then decreased to 9.19 wt.% (500 °C); linear carbonyls and linear acids contents decreased from 16.58 wt.% and 17.45 wt.% to 5.26 wt.% and 4.03 wt.%, respectively; furans content increased from 7.10 wt.% to 15.47 wt.%. The content 11.86 wt.% of levoglucose at 400 °C, 15.41 wt.% of acetic acid at 350 °C and 6.94 wt.% of furfural at 500 °C suggested good pyrolysis selectivity of SPV.

Zongming Zheng; Yun-Zhen Xu; Tipeng Wang; Chang-Qing Dong; Yong-Ping Yang; Dehua Liu

Following publication of the above article (DOI: 10.1007/s10529-009-0150-y) in the October 2009 issue of Biotechnol Lett (32:289–294), it was found that the author affiliation name had been published incorrectly as: National Engineering Laboratory for Power Generation Equipment, School of Renewable Energy, North China Electric University, Beijing 102206, China The correct author affiliation name is listed below: National Engineering Laboratory for Biomass Power Generation Equipment, School of Renewable Energy, North China Electric Power University, Beijing 102206, China

Zhi-bo Zhang; Qiang Lu; Xiao-ning Ye; Tipeng Wang; Xian-hua Wang; Changqing Dong

Tipeng Wang; Jun Yin; Ying Liu; Qiang Lu; Zongming Zheng

Zongming Zheng; Yun-Zhen Xu; Tipeng Wang; Chang-Qing Dong; Yong-Ping Yang; Dehua Liu

Shiguan Yang; Jihong Li; Zhangqing Dong; Yongping Yang; Zongming Zheng; Tipeng Wang; Ying Zhao

Tipeng Wang; Runhe Zhang; Wenjing Su; Qiang Lu; Changqing Dong

Zongming Zheng; Tipeng Wang; Yun-Zhen Xu; Chang-Qing Dong; Dehua Liu