Separation of macerals from subbituminous coals and their response to liquefaction

ABSTRACT Separation of macerals from three Alberta subbituminous coals was investigated using float-and-sink method with dense liquids followed by the density gradient technique proposed by Dyrkacz and co-workers at Argonne National Laboratory, U.S.A. Resolutions of 90 percent or greater purity were obtained in some fractions in quantities sufficient to study their response to liquefaction. The ease of liquefaction of macerals isolated from subbituminous coals was, in descending order, liptinite, vitrinite, inertinite. Liquefaction of inertinite occurred at somewhat higher temperatures compared to that of vitrinite macerals which initiated between 350° and 400°C. Analysis of the chemical makeup of macerals from a subbituminous coal indicated that liptinite was relatively rich in hydrogen, whereas vitrinite and inertinite were relatively rich in oxygen and carbon respectively. The average densities were 1.285, 1.345 and 1.458 g/cc for liptinite, vitrinite, and inertinite respectively. X-ray diffraction and...

[1]  M. Shibaoka,et al.  Response of inertinites from some Australian coals to non catalytic hydrogenation in tetralin , 1985 .

[2]  W. Kalkreuth,et al.  Petrography of low rank coals with reference to liquefaction potential , 1984 .

[3]  M. Holuszko,et al.  Contribution of vitrinite macerals to the liquefaction of subbituminous coals , 1984 .

[4]  R. Winans,et al.  Chemistry and Characterization of Coal Macerals , 1984 .

[5]  Michael A. Wilson,et al.  Carbon distribution in coals and coal macerals by cross polarization magic angle spinning carbon-13 nuclear magnetic resonance spectrometry , 1984 .

[6]  R. Winans,et al.  Tetralin dissolution of macerais separated from a single coal , 1984 .

[7]  E. Horwitz,et al.  Variations in properties of coal macerals elucidated by density gradient separation , 1984 .

[8]  D. Grant,et al.  Structural variations in coal macerals: application of two-dimensional and dipolar dephasing /sup 13/C-NMR techniques , 1984 .

[9]  R. Winans,et al.  Chemistry and characterization of coal macerals: overview , 1984 .

[10]  S. Parkash,et al.  Petrographic composition and liquefaction behaviour of North Dakota and Texas lignites , 1983 .

[11]  M. Shibaoka,et al.  Hydrogenation of the inertinite macerals of Bayswater coal , 1983 .

[12]  M. D. Plessis,et al.  Management of coal macerals in the liquefaction of low rank coals , 1983 .

[13]  W. Kalkreuth.  Rank and Petrographic Composition of Selected Jurassic - Lower Cretaceous Coals of British Columbia, Canada , 1982 .

[14]  G. Maciel,et al.  13C Nuclear magnetic resonance characterization of coal macerals by magic-angle spinning , 1982 .

[15]  H. King,et al.  Aspects of the chemistry of donor solvent coal dissolution. The hydrogen-deuterium exchange reactions of tetralin-d12 with Illinois No. 6 coal, coal products and related compounds , 1982 .

[16]  M. Shibaoka.  Changes in vitroplast derived from a high-volatile bituminous coal during tetralin treatment , 1981 .

[17]  D. Grant,et al.  Carbon-13 CP/MAS spectroscopy of coal macerals , 1981 .

[18]  M. Shibaoka.  Behaviour of vitrinite macerais in some organic solvents in the autoclave , 1981 .

[19]  K. J. Hüttinger,et al.  Catalytic activity of coal minerals in hydrogasification of coal , 1981 .

[20]  Van Krevelen,et al.  Coal--typology, chemistry, physics, constitution , 1981 .

[21]  E. Horwitz,et al.  Laboratory Scale Separation of Coal Macerals , 1981 .

[22]  E. Horwitz,et al.  Separation of coal macerals , 1980 .

[23]  J. Guin,et al.  Effect of coal minerals on reaction rates during coal liquefaction. [12 refs] , 1976 .

[24]  H. L. Lovell,et al.  Dependence of coal liquefaction behaviour on coal characteristics. 2. Role of petrographic composition , 1975 .