Incorporation of quinoline into coal and coal-derived products

Narain, Nand K.; Utz, Bruce R.; Appell, H.R.; Blaustein, Bernard D.

doi:10.1016/0016-2361(83)90109-6

Cited by 8 publications

(4 citation statements)

References 12 publications

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“…Snape et al (1990) found presoaking of bituminous coal/solvent slurries at 250°C increa_sedcoal conversions (SCT: 400°C for 10 minutes) for 9,10-dihydrophenanthrene but not tetralin. Narain et al (1983) found similar 1 improvement! ; in SCT liquefaction with 1-methylnaphthalene.…”

Section: Thermal Treatmentmentioning

confidence: 74%

Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction. Technical progress report, October 1991--December 1991

Song¹,

Saini²,

Huang³

et al. 1992

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Section: Thermal Treatmentmentioning

confidence: 74%

Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction. Technical progress report, October 1991--December 1991

Song¹,

Saini²,

Huang³

et al. 1992

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“…One way to rationalize this phenomenon is to assume that in the absence of hydrogen the free radicals produced react with suitable solvent molecules to form an insoluble residue containing the solvent moiety, thus leading to the large solvent deficits observed. There is evidence that coal reacts with some creosote oil components, particularly quinoline (Narain et al, 1983a). When nitrogen is replaced by hydrogen, some of the hydrogen may be utilized in capping the free radicals, thus minimizing polymerization, which resulted in the formation of smaller molecular weight compounds that are more soluble.…”

Section: Resultsmentioning

confidence: 99%

“…Several important variables, namely coal, solvent, hydrogen, and, in most cases, some form of either a naturally occurring or an added catalyst, are involved in the liquefaction of coal. Usually, chemical adduction of vehicles is favored at higher temperatures, but recent work in our laboratory has shown a low-temperature adduction of quinoline to Bruceton coal (Narain et al, 1983a). However, relatively little attention has been given to the incorporation of the vehicle into the coal.…”

Section: Introductionmentioning

confidence: 99%

“…Collins et al (1977Collins et al ( ,1979 have documented this behavior by using wC-labeled pyridine. Usually, chemical adduction of vehicles is favored at higher temperatures, but recent work in our laboratory has shown a low-temperature adduction of quinoline to Bruceton coal (Narain et al, 1983a). Some of the most direct evidence of chemical adduction comes from the work by Collins et al (1977Collins et al ( , 1979 using [14C]tetralin and labeled 1,3-diphenylpropane.…”

Section: Introductionmentioning

confidence: 99%

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Effect of temperature, coal, donor solvent, and hydrogen on short contact time liquefaction yields

Narain¹

1985

Ind. Eng. Chem. Prod. Res. Dev.

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Ind. Eng. Chem. Prod. Res. Dev. 1985, 2 4 , 641-644 641 noted above, a total yield of single-ring phenols and hydrocarbons of 9.6 w t % would be calculated. This figure compares favorably with the total single-ring phenols' and hydrocarbon yields of less than 2 wt % obtained from pyrolysis alone. Conclusions 1. Preferred products from the hydrodeoxygenation of substituted guaiacols and catechols at temperatures of 250-325 "C were predominantly alkylated phenols and single-ring hydrocarbons, with combined molar yields of up to 0.60 observed. Conversion of these substrates to char was greatly reduced in comparison to pyrolysis alone.2. Hydrocracking of thermally stable biphenyl, diphenylmethane, and phenyl ether interaromatic unit linkages was achieved at temperatures of 280-330 OC during the hydrodeoxygenation of o,o'-biphenol, ohydroxydiphenylmethane, and phenyl ether substrates. Oxygen removal prior to interunit bond cleavage was also observed.3. These model compound results were applied to liquefaction of actual lignins. A 5-fold increase, relative to pyrolysis, in the total yield of single-ring phenols and hydrocarbons was predicted to occur from catalytic liquefaction at milder conditions than those required for pyrolysis. AcknowledgmentWe acknowledge the financial support of the Exxon Teaching Fellowship Program. We thank Drs. John Obst and Roger C. Pettersen of the USDA Forest Products Laboratory, Madison, WI, for providing GC/MS analyses. Registry No. Ligninphenyl ether, 101-84-8. Literature Cited Bredenberg. J. B-son; Ceylan, R. fuel 1983, 62. 342. Bredenberg. J. &son; Huuska, M.; Raty, J.; Korpio, M. J . Cstal. 1982, 77, 242. Connors, W. J.; Johanson, L. N.; Sarkanen, K. V.; Winsiow, P. Holzforschung 1980, 3 4 , 29. Domburg, 0. E.; Sergeeva, V. N.; Kalninsh, A. I. Therm. Anal., Proc. Int. Conf. 3rdThe liquefaction of different coals slurried in Koppers' creosote oil at short contact time (12 min) was studied at different reaction temperatures (300-450 "C). The influence of tetralln and hydrogen on short contact time (SCT) liquefaction ylelds and vehicle Incorporation was monitored. The data support the following concepts: (1) The conversion to tetrahydrofuran (THF) and pentane solubles of the reaction products increased with increasing temperature in all cases.(2) The presence of tetraiin or hydrogen enhanced the conversion to THF and pentane solubles; when both tetralln and hydrogen were present, the effects were additive for conversion to pentane solubles but not additive for conversion to THF solubles. (3) Both high temperature and the presence of a hydrogen source minimized vehicle incorporation into the coal and coal products.

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Chemistry of hydrogen sulphide under coal liquefaction conditions

Hirschon¹,

Laine²

1985

Fuel

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Incorporation of quinoline into coal and coal-derived products

Cited by 8 publications

References 12 publications

Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction. Technical progress report, October 1991--December 1991

Effects of low-temperature catalytic pretreatments on coal structure and reactivity in liquefaction. Technical progress report, October 1991--December 1991

Effect of temperature, coal, donor solvent, and hydrogen on short contact time liquefaction yields

Chemistry of hydrogen sulphide under coal liquefaction conditions

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