منابع مشابه
A computational study of pyrolysis reactions of lignin model compounds
Enthalpies of reaction for the initial steps in the pyrolysis of lignin have been evaluated at the CBS-4m level of theory using fully substituted b-O-4 dilignols. Values for competing unimolecular decomposition reactions are consistent with results previously published for phenethyl phenyl ether models, but with lowered selectivity. Chain propagating reactions of free radicals with a closed-she...
متن کاملChemical Simulation and Quantum Chemical Calculation of Lignin Model Compounds
The conformational preferences of the lignin guaiacyl structural unit were studied by several quantitative chemistry calculation methods using vanillin as a model compound. The potential energy surfaces of the vanillin molecule were scanned by the methods of HF and DFT to find the most stable conformation, as well as three local minimum conformations and six transient conformations. Bonds stren...
متن کاملDe-etherification of lignin model compounds and lignins
Introduction Lignin is the second most abundant polymer on earth and is found in almost all biomass resources. This inexpensive feedstock is an ideal carbon source that can be used to makes fuels and chemicals. However, there are substantial challenges to convert it into a liquid fuel [1]. Lignin is an amorphous polymer consisting of randomly branched phenylpropenyl (C9) groups. The linkages be...
متن کاملReactivity and Reactions of Lignin Model Compounds with Laccases
...................................................................................................................... 3 Acknowledgements .................................................................................................... 5 List of original publications ...................................................................................... 8 Abbreviations ..........................
متن کاملAffinity of Lignin Preparations towards Genotoxic Compounds
The carcinogenicity and mutagenicity of chemicals may be modulated by other chemicals, including those prepared by organic synthesis. Considering the several drawbacks of synthetic compounds vis-a-vis the human organism, the lignin biomass component was examined for this purpose. The binding affinity of lignin samples prepared by chemical and biological modification of lignin products derived f...
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ژورنال
عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan
سال: 1967
ISSN: 0023-2734,2185-0860
DOI: 10.1246/nikkashi1898.70.12_2348