Studies in coal liquefaction with application to the SRC and related processes. Quarterly report, May-July 1981

Studies in coal liquefaction with application to the SRC and related processes. Quarterly report, May-July 1981 [electronic resource]

This report discusses a kinetic investigation of the Fe-S-H₂ system conducted as an outgrowth of current research in the SRC-I (solvent refined coal) process to better understand the effects of naturally occurring iron sulfides in coal hydrogenation and hydrodesulfurization. A total of twelve closed...

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Bibliographic Details
Online Access: Online Access
Corporate Author: National Energy Technology Laboratory (U.S.) (Researcher)
Format: Government Document Electronic eBook
Language:English
Published: Washington, D.C. : Oak Ridge, Tenn. : United States. Office of Fossil Energy. ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1981.
Subjects:
Diagrams.
Kinetics.
X-ray Diffraction.
Sulfides.
Scattering.
Thermochemical Processes.
Coal Liquefaction.
Pyrrhotite.
Src Process.
Transition Element Compounds.
Catalytic Effects.
Sulfur Compounds.
Liquefaction.
Pyrite.
Fuels.
Temperature Dependence.
Minerals.
Sulfide Minerals.
Microscopy.
Energy Sources.
Materials.
Coal.
Diffraction.
Iron Compounds.
Iron Sulfides.
Desulfurization.
Carbonaceous Materials.
Coherent Scattering.
Hydrogenation.
Fossil Fuels.
Chemical Reactions.
Phase Diagrams.
Phase Transformations.
Chalcogenides.
Coal, Lignite, And Peat.
Description
Summary:This report discusses a kinetic investigation of the Fe-S-H₂ system conducted as an outgrowth of current research in the SRC-I (solvent refined coal) process to better understand the effects of naturally occurring iron sulfides in coal hydrogenation and hydrodesulfurization. A total of twelve closed system reactions were carried out in which 48 to 60 mesh pyrite, in the presence of hydrogen gas, underwent transformation to 1C hexagonal pyrrhotite. Reaction temperatures were 350°C and 400°C with four sample runs at temperature. Initial pressure of hydrogen gas was 1250 psig (8617 KPa). A comparison of the results for each reaction series was evaluated with time and temperature as variables. The transformation rate of pyrite to pyrrhotite was found to increase over the range of reaction temperatures with the 400°C samples showing the greatest amount of transformation per unit time. For the 375°C and 400°C runs pyrrhotite formation decreased after approximately 15 minutes of reaction time due to (1) reduced availability of pyrite, and (2) resistance to diffusion in the topochemical product layer.
Item Description:Published through SciTech Connect.
01/01/1981.
"doe/et/13397-11"
"DE83001027"
Tarrer, A. R.; Guin, J. A.; Curtis, C. W.
Auburn Univ., AL (USA). Dept. of Chemical Engineering.
Physical Description:Pages: 102 : digital, PDF file.

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