Study on the structural differences between Heidaigou long flame coal and its vitrinite

ABSTRACT

Heidaigou long flame coal (HDC), with high inertinite content but outstanding liquefaction properties and its vitrinite (HDV) were studied. The structural characteristics of HDC and HDV were studied simultaneously on the basis of structure models developed by ¹³C cross-polarization/magic angle spinning nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS). Aliphatic structures, aromatic structures, and the structures of nitrogen and oxygen in HDC and HDV were investigated and compared. Besides, the different structures and units in HDC and HDV were found and represented.

KEYWORDS:

• Long flame coal
• structural characteristics
• structural units
• structure model
• vitrinite

Additional information

Funding

This work was supported by the Shanghai Excellent Technology Leaders Program [17XD1424900];the National Natural Science Foundation of China [21504057,21606151,21707092];Collaborative Innovation Fund of SIT [XTCX2015-9];Shanghai Natural Science Foundation of Shanghai [14ZR1440500,17ZR1441700];Science and Technology Commission of Shanghai Municipality Project [18090503800];Shanghai Leading Talent Program [017];Shanghai Association for Science and Technology Achievements Transformation Alliance Program [LM201680];