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Title: Enhanced coal liquefaction by low-severity catalytic reactions: Technical progress report for the period December 1986 to February 1987. [3,5 dimethyl phenol, diphenyl ketone, p-hydroxybenzaldehyde, tetrahydro-1-naphthol, bibenzyl, biphenyl, pyrene, benzyl ether, phenyl ether, phenyl-ethyl-ether, decahydronaphthalene]

Abstract

The objective of this investigation is to examine the potential and limitations of temperature-staged catalytic liquefaction. Experiments have been planned to examine the chemical reactions which occur during the low- and high-severity stages, the effects of coal rank and process conditions, the function of catalyst and influence of solvent donor capability. Initial experiments have been conducted using a lignite, subbituminous B, hvC and hvA bituminous coals. Experimental conditions were varied by using separate single low and high severity stages and a two-stage liquefaction sequence. Although no catalyst or solvent were used in these experiments, the atmosphere was systematically changed, using either hydrogen or nitrogen. From the low-severity single-stage reations (275/sup 0/C) it appears that the atmosphere has negligible effects on the product distributions. Reaction variables had a greater influence in the single-stage high severity (425/sup 0/C) runs and a temperature sequence, the highest conversions being obtained in the latter. As expected, the presence of nitrogen in either the high-severity single- or two-stage reactions significantly lowered the percentage conversions when compared to the presence of H/sub 2/ atmosphere in otherwise similar runs. Eleven model compounds, representing structures which could exist in coal, were hydrogenated either in the presence or absence ofmore » a molybdenum sulfide catalyst. Reaction products were analyzed by gas chromatography and characterized by the number of fragments that differ in boiling point relative to unreacted material. It was found that, under the reaction conditions employed, the catalyst can be effective in hydrogenating condensed aromatics, cleaving certain bridging linkages, and stabilizing other bond types. 24 refs., 7 figs., 7 tabs.« less

Authors:
; ;
Publication Date:
Research Org.:
Pennsylvania State Univ., University Park (USA). Coal Research Section
OSTI Identifier:
6741632
Report Number(s):
DOE/PC/90910-2
ON: DE87006280
DOE Contract Number:  
FG22-86PC90910
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; BITUMINOUS COAL; HYDROGENATION; COAL LIQUEFACTION; CATALYSTS; YIELDS; LIGNITE; MOLYBDENUM SULFIDES; CATALYTIC EFFECTS; STRUCTURAL MODELS; SUBBITUMINOUS COAL; TSL PROCESS; COAL RANK; COMPARATIVE EVALUATIONS; EXPERIMENTAL DATA; GAS CHROMATOGRAPHY; HIGH TEMPERATURE; HYDROGEN; MEDIUM PRESSURE; NITROGEN; ORGANIC SOLVENTS; RESIDUES; TEMPERATURE EFFECTS; BLACK COAL; BROWN COAL; CARBONACEOUS MATERIALS; CHALCOGENIDES; CHEMICAL REACTIONS; CHROMATOGRAPHY; COAL; DATA; ELEMENTS; ENERGY SOURCES; FOSSIL FUELS; FUELS; INFORMATION; LIQUEFACTION; MATERIALS; MOLYBDENUM COMPOUNDS; NONMETALS; NUMERICAL DATA; REFRACTORY METAL COMPOUNDS; SEPARATION PROCESSES; SOLVENTS; SULFIDES; SULFUR COMPOUNDS; THERMOCHEMICAL PROCESSES; TRANSITION ELEMENT COMPOUNDS; 010405* - Coal, Lignite, & Peat- Hydrogenation & Liquefaction

Citation Formats

Davis, A, Derbyshire, F J, and Schobert, H H. Enhanced coal liquefaction by low-severity catalytic reactions: Technical progress report for the period December 1986 to February 1987. [3,5 dimethyl phenol, diphenyl ketone, p-hydroxybenzaldehyde, tetrahydro-1-naphthol, bibenzyl, biphenyl, pyrene, benzyl ether, phenyl ether, phenyl-ethyl-ether, decahydronaphthalene]. United States: N. p., 1987. Web.
Davis, A, Derbyshire, F J, & Schobert, H H. Enhanced coal liquefaction by low-severity catalytic reactions: Technical progress report for the period December 1986 to February 1987. [3,5 dimethyl phenol, diphenyl ketone, p-hydroxybenzaldehyde, tetrahydro-1-naphthol, bibenzyl, biphenyl, pyrene, benzyl ether, phenyl ether, phenyl-ethyl-ether, decahydronaphthalene]. United States.
Davis, A, Derbyshire, F J, and Schobert, H H. 1987. "Enhanced coal liquefaction by low-severity catalytic reactions: Technical progress report for the period December 1986 to February 1987. [3,5 dimethyl phenol, diphenyl ketone, p-hydroxybenzaldehyde, tetrahydro-1-naphthol, bibenzyl, biphenyl, pyrene, benzyl ether, phenyl ether, phenyl-ethyl-ether, decahydronaphthalene]". United States.
@article{osti_6741632,
title = {Enhanced coal liquefaction by low-severity catalytic reactions: Technical progress report for the period December 1986 to February 1987. [3,5 dimethyl phenol, diphenyl ketone, p-hydroxybenzaldehyde, tetrahydro-1-naphthol, bibenzyl, biphenyl, pyrene, benzyl ether, phenyl ether, phenyl-ethyl-ether, decahydronaphthalene]},
author = {Davis, A and Derbyshire, F J and Schobert, H H},
abstractNote = {The objective of this investigation is to examine the potential and limitations of temperature-staged catalytic liquefaction. Experiments have been planned to examine the chemical reactions which occur during the low- and high-severity stages, the effects of coal rank and process conditions, the function of catalyst and influence of solvent donor capability. Initial experiments have been conducted using a lignite, subbituminous B, hvC and hvA bituminous coals. Experimental conditions were varied by using separate single low and high severity stages and a two-stage liquefaction sequence. Although no catalyst or solvent were used in these experiments, the atmosphere was systematically changed, using either hydrogen or nitrogen. From the low-severity single-stage reations (275/sup 0/C) it appears that the atmosphere has negligible effects on the product distributions. Reaction variables had a greater influence in the single-stage high severity (425/sup 0/C) runs and a temperature sequence, the highest conversions being obtained in the latter. As expected, the presence of nitrogen in either the high-severity single- or two-stage reactions significantly lowered the percentage conversions when compared to the presence of H/sub 2/ atmosphere in otherwise similar runs. Eleven model compounds, representing structures which could exist in coal, were hydrogenated either in the presence or absence of a molybdenum sulfide catalyst. Reaction products were analyzed by gas chromatography and characterized by the number of fragments that differ in boiling point relative to unreacted material. It was found that, under the reaction conditions employed, the catalyst can be effective in hydrogenating condensed aromatics, cleaving certain bridging linkages, and stabilizing other bond types. 24 refs., 7 figs., 7 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/6741632}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 1987},
month = {Sun Mar 01 00:00:00 EST 1987}
}

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