Frank T. Dulong (Former Employee)
Science and Products
Filter Total Items: 47
Chemistry and origin of minor and trace elements in vitrinite concentrates from a rank series from the eastern United States, England, and Australia Chemistry and origin of minor and trace elements in vitrinite concentrates from a rank series from the eastern United States, England, and Australia
A rank series consisting of twelve vitrinite concentrates and companion whole-coal samples from mined coal beds in the eastern United States, England, and Australia were analyzed for C, H, N, O, ash, and 47 trace and minor elements by standard elemental, instrumental neutron activation analysis (INAA), and direct-current-arc spectrographic (DCAS) techniques. The reflectance of vitrinite...
Authors
P.C. Lyons, C.A. Palmer, N. H. Bostick, J.D. Fletcher, F.T. Dulong, F. W. Brown, Z. A. Brown, M.R. Krasnow, L.A. Romankiw
Marine origin of pyritic sulfur in the Lower Bakerstown coal bed, Castleman coal field, Maryland (U.S.A.) Marine origin of pyritic sulfur in the Lower Bakerstown coal bed, Castleman coal field, Maryland (U.S.A.)
The amount, kind, distribution, and genesis of pyrite in the Lower Bakerstown coal bed in a 150 × 15 m area of the Bettinger mine, Castleman coal field, Maryland, were studied by various analytical techniques. The mined coal, which had a nonmarine roof rock, contained 1.4–2.8 wt.% total sulfur, generally much lower than the high-sulfur coal (> 3.0 wt.% total S) to the north, which is...
Authors
P.C. Lyons, J. F. Whelan, F.T. Dulong
Development and evaluation of deterministic models for predicting the weight of fouling deposits from coal combustion Development and evaluation of deterministic models for predicting the weight of fouling deposits from coal combustion
No abstract available.
Authors
Robert B. Finkelman, F.T. Dulong
Oxidation of pyrite in an anoxic atmosphere Oxidation of pyrite in an anoxic atmosphere
Pyrite (FeS2) inclusions in coal, when heated in an oxygen deficient atmosphere (approximately 1% oxygen), become coated with magnetic Fe3O4 due to oxidation. Most of the FeS2 can thus be removed from the coal by magnetic separation to reduce the sulphur concentration. The oxidation products have been studied in greater detail by measuring the SO2 and O2 in the effluent gas during the...
Authors
A. N. Thorpe, F. E. Senftle, Corrine Alexander, F.T. Dulong, R.B. LaCount, S. Friedman
PROTON MICROPROBE ANALYSIS OF TRACE-ELEMENT VARIATIONS IN VITRINITES IN THE SAME AND DIFFERENT COAL BEDS. PROTON MICROPROBE ANALYSIS OF TRACE-ELEMENT VARIATIONS IN VITRINITES IN THE SAME AND DIFFERENT COAL BEDS.
The PIXE (proton-induced X-ray emission) microprobe can be used for nondestructive, in-situ analyses of areas as small as those analyzed by the electron microprobe, and has a sensitivity of detection as much as two orders of magnitude better than the electron microprobe. Preliminary studies demonstrated that PIXE provides a capability for quantitative determination of elemental...
Authors
J.A. Minkin, E. C. T. Chao, Herma Blank, F.T. Dulong
Geologic processes affecting the quality of the Upper Freeport coal bed, west-central Pennsylvania Geologic processes affecting the quality of the Upper Freeport coal bed, west-central Pennsylvania
No abstract available.
Authors
R.W. Stanton, C. B. Cecil, B.S. Pierce, L.F. Ruppert, F.T. Dulong
Science and Products
Filter Total Items: 47
Chemistry and origin of minor and trace elements in vitrinite concentrates from a rank series from the eastern United States, England, and Australia Chemistry and origin of minor and trace elements in vitrinite concentrates from a rank series from the eastern United States, England, and Australia
A rank series consisting of twelve vitrinite concentrates and companion whole-coal samples from mined coal beds in the eastern United States, England, and Australia were analyzed for C, H, N, O, ash, and 47 trace and minor elements by standard elemental, instrumental neutron activation analysis (INAA), and direct-current-arc spectrographic (DCAS) techniques. The reflectance of vitrinite...
Authors
P.C. Lyons, C.A. Palmer, N. H. Bostick, J.D. Fletcher, F.T. Dulong, F. W. Brown, Z. A. Brown, M.R. Krasnow, L.A. Romankiw
Marine origin of pyritic sulfur in the Lower Bakerstown coal bed, Castleman coal field, Maryland (U.S.A.) Marine origin of pyritic sulfur in the Lower Bakerstown coal bed, Castleman coal field, Maryland (U.S.A.)
The amount, kind, distribution, and genesis of pyrite in the Lower Bakerstown coal bed in a 150 × 15 m area of the Bettinger mine, Castleman coal field, Maryland, were studied by various analytical techniques. The mined coal, which had a nonmarine roof rock, contained 1.4–2.8 wt.% total sulfur, generally much lower than the high-sulfur coal (> 3.0 wt.% total S) to the north, which is...
Authors
P.C. Lyons, J. F. Whelan, F.T. Dulong
Development and evaluation of deterministic models for predicting the weight of fouling deposits from coal combustion Development and evaluation of deterministic models for predicting the weight of fouling deposits from coal combustion
No abstract available.
Authors
Robert B. Finkelman, F.T. Dulong
Oxidation of pyrite in an anoxic atmosphere Oxidation of pyrite in an anoxic atmosphere
Pyrite (FeS2) inclusions in coal, when heated in an oxygen deficient atmosphere (approximately 1% oxygen), become coated with magnetic Fe3O4 due to oxidation. Most of the FeS2 can thus be removed from the coal by magnetic separation to reduce the sulphur concentration. The oxidation products have been studied in greater detail by measuring the SO2 and O2 in the effluent gas during the...
Authors
A. N. Thorpe, F. E. Senftle, Corrine Alexander, F.T. Dulong, R.B. LaCount, S. Friedman
PROTON MICROPROBE ANALYSIS OF TRACE-ELEMENT VARIATIONS IN VITRINITES IN THE SAME AND DIFFERENT COAL BEDS. PROTON MICROPROBE ANALYSIS OF TRACE-ELEMENT VARIATIONS IN VITRINITES IN THE SAME AND DIFFERENT COAL BEDS.
The PIXE (proton-induced X-ray emission) microprobe can be used for nondestructive, in-situ analyses of areas as small as those analyzed by the electron microprobe, and has a sensitivity of detection as much as two orders of magnitude better than the electron microprobe. Preliminary studies demonstrated that PIXE provides a capability for quantitative determination of elemental...
Authors
J.A. Minkin, E. C. T. Chao, Herma Blank, F.T. Dulong
Geologic processes affecting the quality of the Upper Freeport coal bed, west-central Pennsylvania Geologic processes affecting the quality of the Upper Freeport coal bed, west-central Pennsylvania
No abstract available.
Authors
R.W. Stanton, C. B. Cecil, B.S. Pierce, L.F. Ruppert, F.T. Dulong