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Research on quantifying the hydrophilicity of leached coals by FTIR spectroscopy

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Treść / Zawartość
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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Surface properties play important roles in characterization of structural parameters and the hydrophilicity index. Accurate analysis of the macerals rather than the average properties of the macerals and minerals are crucial for these parameters and indexes. In order to improve the accuracy of analyzing coal surface property, HF/HCl acid leaching was applied to eliminate the interference of minerals. FTIR was used to characterize the differences in surface chemical composition between raw and processed coal. Moreover, each functional group was analyzed quantitatively. Based on these quantitative data, the structural parameters and hydrophilicity indexes were calculated. From the results of FTIR, the peaks of mineral cover up the types of the organic peaks, such as -COOH and aromatic CH stretching. In addition, they decrease the intensity of the peak such as C=C and aromatics CHx out-of-plane deformation in the spectra of raw coals. However, it provided the accurate types and contents of organic functional groups of the macerals after acid leaching. The structural parameter results indicate that the values cannot reflect the coal ranks through the surface properties of raw coals while they show a good relationship with the degree of coalification in the analysis of processed coals. Besides, the hydrophilicity indexes are verified by the natural floatability of coal macerals of the processed coals. It is also found that the processed lignite coal cannot be floated despite elimination of the hydrophilic minerals. The main reason of hard-to-float property of lignite coal lies in a strong hydrophilicity of macerals.
Rocznik
Strony
227--239
Opis fizyczny
Bibliogr. 29 poz., rys., tab.
Twórcy
autor
  • School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
autor
  • School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
  • Advanced Analysis and Computation Center, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China
autor
  • School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
autor
  • School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
autor
  • School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China
Bibliografia
  • BENKHEDDA Z., LANDAIS P., KISTER J., DERPPE J.M., MONTHIOUX M., 1992, Spectroscopic analyses of aromatic hydrocarbons extracted from naturally and artificially matured coals, Energy & Fuels, 6(2), 166-172.
  • BISWAL S.K., 2001, Studies on flotation cell and modelling of flotation column for beneficiation of Indian high ash oxidised non-coking coal. Ph.D. Thesis, IIT, Kharagpur.
  • BISWAL S.K., ACHARJEE D.K., 2003, Flotation characteristics of high ash oxidised Indian non-coking coal and its effects on cell flotation, The European Journal of Mineral Processing and Environmental Protection, 3 (2), 167–176 1303–0868.
  • CELIK M.S., SEYHAN K., 1995, Effect of heat treatment on the flotation of Turkish lignites, Coal Preparation, 16, 65-79.
  • CHAU T.T., BRUCKARD W.J., KOH P., NGUYEN A.V., 2009, A review of factors that affect contact angle and implications for flotation practice, Advances in Colloid & Interface Science, 150(2), 106–115.
  • CINAR M., 2009, Floatability and desulfurization of a low-rank (Turkish) coal by low temperature heat treatment, Fuel processing Technology, 90(10), 1300-1304.
  • FUERSTENAU D.W., 1987, Oxidation phenomena in coal flotation: Part I. Correlation between oxygen functional group concentration, immersion wettability and salt flotation response, Coal Preparation, 4(3-4), 161–182.
  • GANZ H., KALKREUTH W., 1987, Application of infrared spectroscopy to the classification of kerogen-types and the evolution of source rock and oil-shale potentials, Fuel, 66(5), 708-711.
  • GUTIERREZ-RODRIGUEZ J.A., APLAN F.F., 1984, The effect of oxygen on the hydrophobicity and flotability of coal, Colloids & Surfaces, 12(84), 27-51.
  • HARRIS G.H., DIAO J., FUERSTENAU D.W., 1995, Coal flotation with nonionic surfactants, Coal Preparation, 16(3), 135-147.
  • IGLESIAS M.J., 1995, FTIR study of pure vitrains and associated coals, Energy & Fuels, 9(3), 243.
  • ILAGOUMA A.T., DORNAND J., LIU C.F., ZENONE F., MANI J.C., 1990, Surface properties of coal and their role in coal beneficiation, European Journal of Medicinal Chemistry, 25(7), 609-615.
  • JENA M.S., BISWAL S.K., RUDRAMUNIYAPPA M.V., 2008, Study on flotation characteristics of oxidised Indian high ash sub-bituminous coal, International Journal of Mineral Processing, 87(s 1-2), 42–50.
  • LASEN J.W., PAN C.S., SHAWVER S., 1989, Effect of demineralization on the macromolecular structure of coals, Energy & Fuels, 3(5), 557-561.
  • LIANG Y., TIAN F.C., LUO H.Z., TANG H., 2015, Characteristics of coal re-oxidation based on microstructural and spectral observation, International Journal of Mining Science and Technology, 25, 749-754.
  • MASTALERZ M., BUSTIN R.M., 1995, Application of reflectance micro-Fourier transform infrared spectrometry in studying coal macerals: comparison with other Fourier transform infrared techniques, Fuel, 74(4), 536-542.
  • PAINTER P.C., SNYDER R.W., 1981, Concerning the application of FT-IR to the study of coal: a critical assessment of band assignments and the application of spectral analysis programs, Applied Spectroscopy, 35(5), 475–485.
  • PAINTER P.C., STARSINIC M., COLEMAN M.M., 1985, Determination of functional groups in coal by Fourier Transform interferometry, Fourier Transform Infrared Spectroscopy, 169–240.
  • PAINTER P.C., STARSINIC M., SQUIRES E., DAVIS A.A., 1983, Concerning the 1600 cm−1 region in the spectrum of coal, Fuel, 62 (6), 742–744.
  • PAITER P., STARASINIC M., COLEMAN M., 1985, Determination of functional groups in coal by Fourier Transform Interferometry, Fourier Transform Infrared Spectra, 169-241.
  • PETERSEN H.I., ROSENBERG P., NYTOFT H.P., 2008, Oxygen groups in coals and alginate-rich kerogen revisited, International Journal of Coal Geology, 74(2), 93-113.
  • SHANG J.Y., WOLF E.E., 1983, FTIR studies of potassium catalyst treated gasified coal chars and carbon, Fuel, 62(2), 252–255.
  • STEEL K. M., BESIDA J., O’DONNELL T.A., WOOD D.G., 2001, Production of Ultra Clean Coal. Part I. Dissolution behaviour of mineral matter in black coal toward hydrochloric and hydrofluoric acids, Fuel Processing Technology, 70(3), 171–192.
  • STRYDOM C.A., BUNT J.R., SCHOBERT H.H., RAGHOO M., 2011, Changes to the organic functional groups of an inertinite rich medium rank bituminous coal during acid treatment processes, Fuel Processing Technology, 92(4), 764-770.
  • ULUSOY U., YEKELER M., HICYILMAZ C., 2003, Determination of the shape, morphological and wettability properties of quartz and their correlations, Minerals Engineering, 16(10), 951–964.
  • VASUMATHI N., VIJAYA KUMAR T.V., RATCHAMBIGAI S., SUBBA RAO S., BHASKAR RAJU G., 2015, Flotation studies on low grade graphite ore from eastern India, International Journal of Mining Science and Technology, 25, 415-420.
  • WANG S.H., GRIFFITHS P.R., 1985, Resolution enhancement of diffuse reflectance i.r. spectra of coals by Fourier self-deconvolution: 1. C-H stretching and bending modes, Fuel, 64(2), 229–236.
  • XIA W., YANG J., ZHAO Y., ZHU B., WANG Y.L., 2012, Improving floatability of taixi anthracite coal of mild oxidation by grinding, Physicochemical Problems of Mineral Processing, 48(2), 393−401.
  • YE Y., JIN R., MILLER J.D., 1988, Thermal treatment of low-rank coal and its relationship to flotation response, Coal Preparation, 6(1), 1-16.
Uwagi
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-ff1856e6-416f-46ac-b35b-c6bd24933b2c
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