title: Effect of torrefaction on structure and fast pyrolysis behavior of corncobs.
abstract: Pretreatment of corncobs using torrefaction was conducted in an auger reactor at 250-300 °C and residence times of 10-60 min. The torrefied corncobs were fast pyrolyzed in a bubbling fluidized bed reactor at 470 °C to obtain high-quality bio-oil. The heating value and pH of the bio-oil improved when the torrefaction as pretreatment was applied; however, increasing bio-oil yield penalties were observed with increasing torrefaction severity. Fourier transform infrared Spectroscopy (FTIR) and quantitative solid (13)C nuclear magnetic resonance spectrometry (NMR) analysis of torrefied corncobs showed that the devolatilization, crosslinking and charring of corncobs during torrefaction could be responsible for the bio-oil yield penalties. Gas chromatography-mass spectrometry (GC-MS) analysis showed that the acetic acid and furfural contents of the bio-oil decreased with torrefaction temperature or residence time. The results showed that torrefaction is an effective method of pretreatment for improving bio-oil quality if the crosslinking and charring of biomass can be restricted.
authors.affiliation: Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Science, Guangzhou 510640, PR China.
authors.forename: Anqing
authors.initials: A
authors.lastname: Zheng
authors.forename: Zengli
authors.initials: Z
authors.lastname: Zhao
authors.forename: Sheng
authors.initials: S
authors.lastname: Chang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Huang
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Wang
authors.forename: Fang
authors.initials: F
authors.lastname: He
authors.forename: Haibin
authors.initials: H
authors.lastname: Li
mesh_terms: D017745:Incineration / Q000379:methods*; D009821:Oils / Q000138:chemical synthesis*; D035261:Plant Components, Aerial / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D009821:Oils