title: Enhancing the quality of bio-oil and selectivity of phenols compounds from pyrolysis of anaerobic digested rice straw.
abstract: 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.
authors: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China.
authors: Jiajin
authors: J
authors: Liang
authors: College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Guangdong 510640, PR China.
authors: Yunqin
authors: Y
authors: Lin
authors: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China. Electronic address: shubinwu@scut.edu.cn.
authors: Shubin
authors: S
authors: Wu
authors: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China.
authors: Chao
authors: C
authors: Liu
authors: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, PR China.
authors: Ming
authors: M
authors: Lei
authors: The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
authors: Chao
authors: C
authors: Zeng
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D001709:Biotechnology / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry; D009821:Oils / Q000737:chemistry*; D012275:Oryza / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry*; D013696:Temperature; D014866:Waste Products
chemical_list: D056804:Biofuels; D009821:Oils; D010636:Phenols; D014866:Waste Products
keywords: Anaerobic digested rice straw; Pyrolytic product; Raw rice straw; Thermal decomposition characteristic