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Solubility Property of Baganuur Coal: Performance Assessment by FTIR Spectroscopic Analysis

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Abstract:

In the present work, the extraction of Mongolian Baganuur coal in solvents as pyridine and ionic liquid with 1-butyl-3-methyl-imidazolium chloride ([Bmim]Cl) anion was first applied. The as recieved coal, its extracts and insoluble residues were then characterized using the Fourier transform infrared (FTIR) spectroscopy. The obtained FTIR spectra have revealed many new features in the field of coal study. An appearance or sharpening of the particular bands after the chemical treatment allow a determination of inactive or weak fundamental vibrations precisely. Some emphasis are as follows, substantial quantitative change, the integrated area decrease of water molecule band at 3260 cm−1 comparing to as received sample and ionic liquid treated extract, can be seen for the extract spectrum in the pyridine treatment. Pyridine react to coal structure particularly in long-wave frequency zone means very susceptible to the oxygen containing functional group. Upon interaction between acidic group of the coal and the basic solvent as pyridine, the inter-fragment hydrogen and ester bonding in the coal structure is breaking, thus increasing the solubility of the individual fragments via producing new components. Towards forming H bond in the short wave zone Cl− anion shows a strong effect on the coal molec-ular structure. A stabilization of hydrogen bonds show well fluidization and a strong intermolecular interaction of the process via its powerful spectral intensity that is followed many new bands and con-siderable strengthening of band spectral integral area in this frequency region. In long-wave vibrational region there are appearances of many new bands, shift in frequency and depletion of the as recieved coal bands. [Bmim]Cl treatment exhibits the highest effect of the disruption on the carboxylic acids dimer.

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Periodical:

Solid State Phenomena (Volume 323)

Pages:

28-41

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.323.28

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Online since:

August 2021

Authors:

Munkhtsetseg Sambuu*, Khandmaa Tsagaanaa, Erdene-Ochir Ganbold, Galbadrakh Ragchaa, Enkhtor Sukhbaatar, Anna Nikolaevna Oleshkevich, Natalia Mikhailovna Lapchuk

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CoAl, FTIR, Ionic Liquid, Pyridine

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