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Title: Catalysts for upgrading solvent refined lignite

Abstract

The solvent refined lignite (SRL), made at the University of North Dakota Process Development Unit, was a solid having a nominal melting point of 160/sup 0/C. The SRL was pulverized and mixed with a donor solvent, tetralin. The SRL to tetralin ratio of 1:1 was selected to pretreat in a high pressure and temperature reactor. The optimized reactor conditions were a reaction temperature of 475/sup 0/C, an initial hydrogen pressure of 2000 psig and a retention time of 40 minutes. Under these conditions approximately 97% of the SRL was dissolved in tetralin. The resulting solution was used to test the 27 developmental catalysts. The catalysts were developed by impregnating on the ..gamma..-alumina the 3 active metals; MoO/sub 3/, CoO, and WO/sub 3/, each at 3 levels. The effect of these factors on upgrading of the SRL was evaluated in terms of denitrogenation, desulfurization, and hydrocracking. The multiple linear regression analysis showed that the metal compositions for the best overall catalytic performance were 9.5% MoO/sub 3/, 4.3% CoO, and 4% WO/sub 3/ (% of carrier weight). A model was developed based on the results of scanning electron micrographs to explain some of the physical characteristics of the catalysts. The disadvantage ofmore » the incipient wetness method used in metal impregnation was explained, and the preferable pore structure and distribution were suggested.« less

Authors:
Publication Date:
OSTI Identifier:
5601704
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CATALYSTS; SCANNING ELECTRON MICROSCOPY; COBALT OXIDES; CATALYTIC EFFECTS; HYDROGENATION; LIGNITE; DISSOLUTION; SOLVENT-REFINED COAL; MOLYBDENUM OXIDES; DENITRIFICATION; DESULFURIZATION; HYDROCRACKING; TUNGSTEN OXIDES; HIGH PRESSURE; HIGH TEMPERATURE; REGRESSION ANALYSIS; TETRALIN; AROMATICS; BROWN COAL; CARBONACEOUS MATERIALS; CHALCOGENIDES; CHEMICAL REACTIONS; COAL; COBALT COMPOUNDS; CRACKING; DECOMPOSITION; ELECTRON MICROSCOPY; ENERGY SOURCES; FOSSIL FUELS; FUELS; HYDROCARBONS; MATERIALS; MATHEMATICS; MICROSCOPY; MOLYBDENUM COMPOUNDS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PYROLYSIS; STATISTICS; THERMOCHEMICAL PROCESSES; TRANSITION ELEMENT COMPOUNDS; TUNGSTEN COMPOUNDS; 010405* - Coal, Lignite, & Peat- Hydrogenation & Liquefaction

Citation Formats

Kim, N K. Catalysts for upgrading solvent refined lignite. United States: N. p., 1982. Web.
Kim, N K. Catalysts for upgrading solvent refined lignite. United States.
Kim, N K. 1982. "Catalysts for upgrading solvent refined lignite". United States.
@article{osti_5601704,
title = {Catalysts for upgrading solvent refined lignite},
author = {Kim, N K},
abstractNote = {The solvent refined lignite (SRL), made at the University of North Dakota Process Development Unit, was a solid having a nominal melting point of 160/sup 0/C. The SRL was pulverized and mixed with a donor solvent, tetralin. The SRL to tetralin ratio of 1:1 was selected to pretreat in a high pressure and temperature reactor. The optimized reactor conditions were a reaction temperature of 475/sup 0/C, an initial hydrogen pressure of 2000 psig and a retention time of 40 minutes. Under these conditions approximately 97% of the SRL was dissolved in tetralin. The resulting solution was used to test the 27 developmental catalysts. The catalysts were developed by impregnating on the ..gamma..-alumina the 3 active metals; MoO/sub 3/, CoO, and WO/sub 3/, each at 3 levels. The effect of these factors on upgrading of the SRL was evaluated in terms of denitrogenation, desulfurization, and hydrocracking. The multiple linear regression analysis showed that the metal compositions for the best overall catalytic performance were 9.5% MoO/sub 3/, 4.3% CoO, and 4% WO/sub 3/ (% of carrier weight). A model was developed based on the results of scanning electron micrographs to explain some of the physical characteristics of the catalysts. The disadvantage of the incipient wetness method used in metal impregnation was explained, and the preferable pore structure and distribution were suggested.},
doi = {},
url = {https://www.osti.gov/biblio/5601704}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1982},
month = {Fri Jan 01 00:00:00 EST 1982}
}

Thesis/Dissertation:
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