title: Investigation into the lignin decomposition mechanism by analysis of the pyrolysis product of Pinus radiata.
abstract: Lignin pyrolysis chemistry was investigated via the analysis of the products obtained from the fast pyrolysis of a pine wood at different temperatures. Methoxy phenols, such as guaiacols and eugenols, were produced mainly at 375 and 475°C, while non-methoxy phenols, such as alkyl phenols and pyrocatechols were dominant at 525 and 575°C. At 575°C, aromatic hydrocarbons were formed together with larger amounts of light hydrocarbon gases. When the temperature was increased from 375 and 475°C, the yield of pyrolytic lignin was increased, whereas its average molecular weight was decreased. At 525°C, smaller molecular pyrolytic lignin with a maximum concentration of phenolic hydroxyl groups was produced due to the increased secondary cracking of the reaction intermediates. On the other hand, at 575°C, larger molecular pyrolytic lignin with smaller amounts of phenolic hydroxyl groups was produced due to the increased condensation activity of the pyrolysis reaction intermediates.
authors: Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon 24252, Republic of Korea.
authors: Young-Min
authors: YM
authors: Kim
authors: Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea; Department of Clean Energy and Chemical Engineering, Korea University of Science and Technology, Daejeon 34113, Republic of Korea.
authors: Jungho
authors: J
authors: Jae
authors: School of Environmental engineering, University of Seoul, Seoul 02504, Republic of Korea.
authors: Soyoung
authors: S
authors: Myung
authors: Bioenergy & Biochemical Research Center, Korea Research Institute of Bioscience & Biotechnology, Daejeon 34141, Republic of Korea.
authors: Bong Hyun
authors: BH
authors: Sung
authors: School of Environmental engineering, University of Seoul, Seoul 02504, Republic of Korea.
authors: Jong-In
authors: JI
authors: Dong
authors: School of Environmental engineering, University of Seoul, Seoul 02504, Republic of Korea. Electronic address: catalica@uos.ac.kr.
authors: Young-Kwon
authors: YK
authors: Park
mesh_terms: D006358:Hot Temperature; D008031:Lignin / Q000032:analysis / Q000737:chemistry; D010636:Phenols / Q000032:analysis / Q000737:chemistry; D028223:Pinus / Q000737:chemistry*; D014934:Wood / Q000032:analysis / Q000737:chemistry
chemical_list: D010636:Phenols; D008031:Lignin
keywords: GPC; Lignin; NMR; Pyrolysis mechanism