Crossed-reaction networks in the catalytic hydrodenitrogenation of synthetic liquid fuels. Quarterly report, May 1, 1982-July 31, 1982

Technical Report · Fri Jan 01 04:00:00 EST 1982

OSTI ID:5277204

Satterfield, C N; Yang, S H; Smith, C M; Ingalls, M

Studies at 350, 375, and 390/sup 0/C, and 6.9 MPa showed that the presence of H/sub 2/S (generated in situ from CS/sub 2/) in the overall reaction network somewhat inhibits hydrogenation and dehydrogenation reactions but markedly accelerates hydrogenolysis reactions, for a net increase in the overall rate of hydrodenitrogenation (HDN). These effects are similar to those observed previously in vapor-phase reactions. H/sub 2/S has little effect on the activation energies for the hydrogenation and dehydrogenation reactions, but significantly reduces those for the hydrogenolysis reactions. Certain plugging problems encountered upon reacting 5,6,7,8 tetrahydroquinoline are attributed to formation of a trimer imine as an intermediate. The presence of tetralin in the liquid inhibits the overall hydrodenitrogenation reaction, indicating that inhibition by competitive adsorption is more important than the accelerating hydrogen-donor capability that tetralin exhibits in some homogeneous reactions. In an associated paper (Satterfield and Yang, 1982) the authors have reported on studies carried out in a trickle bed reactor using a NiMo/Al/sub 2/O/sub 3/ catalyst which was presulfided but in which no sulfur compound was added to liquid or gas during reaction. In previous vapor phase studies they have shown that the rate of catalytic hydrodenitrogenation (HDN) of pyridine or quinoline is increased in the presence of H/sub 2/S (Satterfield and Gueltekin, 1981) and they have interpreted this in terms of the comparative effect of H/sub 2/S on the hydrogenation versus the hydrogenolysis reactions that occur in the overall HDN reaction. In the present study they have analyzed the effects of the present H/sub 2/S on the reaction in the liquid phase, in an analogous fashion to our earlier vapor-phase studies.

• Research Organization: Massachusetts Inst. of Tech., Cambridge (USA)
• DOE Contract Number: AC22-80PC30075
• OSTI ID: 5277204
• Report Number(s): DOE/PC/30075-10; ON: DE82019424
• Country of Publication: United States
• Language: English

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ADDITIVES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
AZINES
CARBON COMPOUNDS
CARBON SULFIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL REACTORS
DATA
DENITRIFICATION
ELEMENTS
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROGEN TRANSFER
HYDROGENATION
INFORMATION
KINETICS
MEDIUM PRESSURE
METALS
MOLYBDENUM
NICKEL
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYRIDINES
QUINOLINES
REACTION KINETICS
RESEARCH PROGRAMS
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE EFFECTS
TETRALIN
TRANSITION ELEMENTS