U.S. Department of EnergyOffice of Scientific and Technical Information
Controlled short residence time coal liquefaction process
Abstract
Normally solid dissolved coal product and a distillate liquid product are produced by continuously passing a feed slurry comprising raw feed coal and a recycle solvent oil and/or slurry together with hydrogen to a preheating-reaction zone, the hydrogen pressure in the preheatingreaction zone being at least 1500 psig (105 kg/cm2), reacting the slurry in the preheating-reaction zone at a temperature in the range of between about 455 degrees and about 500 degrees C, to dissolve the coal to form normally liquid coal and normally solid dissolved coal. A total slurry residence time is maintained in the reaction zone ranging from a finite value from about 0 to about 0.2 hour, and reaction effluent is continuously and directly contacted with a quenching fluid to substantially immediately reduce the temperature of the reaction effluent to below 425 degrees C to substantially inhibit polymerization so that the yield of insoluble organic matter comprises less than 9 weight percent of said feed coal on a moisture-free basis. Th reaction is performed under conditions of temperature, hydrogen pressure and residence time such that the quantity of distillate liquid boiling within the range C5-455 degrees C is an amount at least equal to that obtainable bymore »
- Inventors:
- Publication Date:
- OSTI Identifier:
- 5179263
- Patent Number(s):
- US 4328088
- Assignee:
- Pittsburgh And Midway Coal Mining CO.
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: Filed date 9 Sep 1980; Other Information: PAT-APPL-182698
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 01 COAL, LIGNITE, AND PEAT; COAL; DEASHING; COAL LIQUEFACTION; CONTROL; SLURRIES; SOLID FUELS; SRC PROCESS; CARBONACEOUS MATERIALS; DISPERSIONS; ENERGY SOURCES; FOSSIL FUELS; FUELS; LIQUEFACTION; MATERIALS; MIXTURES; SUSPENSIONS; THERMOCHEMICAL PROCESSES; 010405* - Coal, Lignite, & Peat- Hydrogenation & Liquefaction
Citation Formats
Anderson, R P, Schmalzer, D K, and Wright, C H. Controlled short residence time coal liquefaction process. United States: N. p., 1982.
Web.
Anderson, R P, Schmalzer, D K, & Wright, C H. Controlled short residence time coal liquefaction process. United States.
Anderson, R P, Schmalzer, D K, and Wright, C H. 1982.
"Controlled short residence time coal liquefaction process". United States.
@article{osti_5179263,
title = {Controlled short residence time coal liquefaction process},
author = {Anderson, R P and Schmalzer, D K and Wright, C H},
abstractNote = {Normally solid dissolved coal product and a distillate liquid product are produced by continuously passing a feed slurry comprising raw feed coal and a recycle solvent oil and/or slurry together with hydrogen to a preheating-reaction zone, the hydrogen pressure in the preheatingreaction zone being at least 1500 psig (105 kg/cm2), reacting the slurry in the preheating-reaction zone at a temperature in the range of between about 455 degrees and about 500 degrees C, to dissolve the coal to form normally liquid coal and normally solid dissolved coal. A total slurry residence time is maintained in the reaction zone ranging from a finite value from about 0 to about 0.2 hour, and reaction effluent is continuously and directly contacted with a quenching fluid to substantially immediately reduce the temperature of the reaction effluent to below 425 degrees C to substantially inhibit polymerization so that the yield of insoluble organic matter comprises less than 9 weight percent of said feed coal on a moisture-free basis. Th reaction is performed under conditions of temperature, hydrogen pressure and residence time such that the quantity of distillate liquid boiling within the range C5-455 degrees C is an amount at least equal to that obtainable by performing the process under the same conditions except for a longer total slurry residence time, e.g., 3 hour. Solvent boiling range liquid is separated from T reaction effluent and recycled as process solvent.},
doi = {},
url = {https://www.osti.gov/biblio/5179263},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 04 00:00:00 EDT 1982},
month = {Tue May 04 00:00:00 EDT 1982}
}