Spectroscopy and Spectral Analysis, Volume. 41, Issue 9, 2934(2021)
Effect of Sequential Solvent Treatment on the Macromolecular Structure of Organic Matter in Zichang Coal
Understanding the depolymerization and dissociation of the macromolecular structure of low-rank coal organic matter at the molecular level, is a key issue that needs to be solved urgently to efficiently use low-rank coal and obtain high value-added chemicals from it. Based on this, the Zichang low-rank coal was treated by sequential solvent treatment such as ultrasonic extraction, alcoholysis, and catalytic alcoholysis. Carbon nuclear magnetic resonance spectroscopy (13C NMR), X-Ray photoelectron spectroscopy (XPS) measurements, thermogravimetric (TG) and differential thermal analysis (DTG) were used to characterize the samples. The results show that the ratio of aliphatic carbon (fal) in coal macromolecular structure is decreased while the aromaticity (fa) increased during solvent treatments. The distribution of C and O elements are influenced greatly. The macromolecular structure of coal is depolymerized and dissociated to some extent, and its thermal stability is increased. After disulfide/acetone (CS2/AC) ultrasonic extraction at room temperature, the structures of oxy-aliphatic carbon (
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Gui-xiong ZHANG, Xiao-xia YANG, Kai LIU, Feng FU. Effect of Sequential Solvent Treatment on the Macromolecular Structure of Organic Matter in Zichang Coal[J]. Spectroscopy and Spectral Analysis, 2021, 41(9): 2934
Category: Research Articles
Received: Aug. 7, 2020
Accepted: --
Published Online: Oct. 29, 2021
The Author Email: ZHANG Gui-xiong (653335723@qq.com)