Structure characters and molecular structure models of low-rank bituminous coal macerals in northern Shaanxi
Abstract：Vitrinite and inertinite concentrates,prepared by manual separation from Shanbei low rank bituminous coal,were analyzed using the ultimate analysis,FTIR,13C-NMR,and XRD.Molecular structure models of vitrinite and inertinite were proposed accordingly.Results indicate that the content of oxygen is higher,while sulfur is extremely low in both vitrinite and inertinite.Aromatic carbon ratio in vitrinite is 0.634 and the average number of condensation ring is 2.98,while they are 0.734 and 3.15 respectively in inertinite.The inertinite component exhibits higher condensation degree with larger aromatic nuclear size and more well-aligned structure than the vitrinite.Specification of relations between molecular structure and maceral group features from the viewpoint of molecular level will contribute to the high efficient and clean conversion of low-rank bituminous coals.
Keywords：low-rank bituminous coalmaceralstructural charactermolecular structural models
Publication Date：2017-01-01