A Study of the Mechanisms of Guaiacol Pyrolysis Based on Free Radicals Detection Technology
Guoxiang Li, Zhongyang Luo, Wenbo Wang, Jianmeng Cen
Abstract
In order to understand the reaction mechanism of lignin pyrolysis, the pyrolysis process of guaiacol (o-methoxyphenol) as a lignin model compound was studied by free radical detection technology (electron paramagnetic resonance, EPR) in this paper. It was proven that the pyrolysis reaction of guaiacol is a free radical reaction, and the free radicals which can be detected mainly by EPR are methyl radicals. This paper proposes a process in which four free radicals (radicals 1- C6H4(OH)O*, radicals 5- C6H4(OCH3)O*, methyl radicals, and hydrogen radicals) are continuously rearranged during the pyrolysis of guaiacol.
Topics & Concepts
GuaiacolRadicalPyrolysisElectron paramagnetic resonanceChemistryLigninPhotochemistryBeta scissionOrganic chemistryRadical substitutionCatalysisNuclear magnetic resonancePhysicsLignin and Wood ChemistryThermochemical Biomass Conversion ProcessesBiochemical and biochemical processes