Structural feature of low rankcoal by solid state13C NMR spectroscopy

摘要

In order to research low rank coal conversion mechanism, coal macromolecule is needed to be explored deeply.In this paper,Elemental composition and solid state13C NMR spectroscopy of Fushun low rank coal were firstly tested.After dividing peaks of13 C NMR spectroscopy, eight coal macromolecular structure parameter (such as aromatic carbon ratio fa and carbonyl carbon ratio fac) were calculated subsequently.Combined with infrared spectroscopy data,software ChemOffice Ultra 2010 was used to draw Coal Macromolecule Structural Model.Connecting formats of different atoms were regulated in order to make sure these parameters are close to test values.In this way, Fushun coal structural model was obtained, with molecular formula as C218 H215 N3O32, with relative errors less than 14％.