Novel catalytic methods for heteroatom removal in coal liquids upgrading. Final report, September 1983-December 1985
The goal of this project is to optimize the reaction conditions for upgrading coal liquids through the development of novel hydrotreating catalysts. Results for this quarter are summarized by tasks. Task 1: The objectives in this task were to compare the relative effects of the added nucleophiles H2S, LiHS, NH4HS, NH3, and H2O on the hydrodenitrogenation of an SRC-II coal liquid with a commercial sulfided CoMo catalyst. We found that only H2S enhances the HDN activity of the catalyst, whereas NH3 retards the process. However, under our conditions, H2S had a negligible effect when a NiMo catalyst was substituted for CoMo. In a complementary study we studied the interaction of H2S with potential coal model compounds and with coal. From the work on coal models we found that H2S catalyzes hydrogen transfer from tetralin to the models or to coal. Task 2: We used organometallic precursors to synthesize several surface confined NiMo and CoMo catalysts on alumina and tested them for quinoline HDN activity. These catalysts were found to have a higher activity than conventional catalysts. However, the selectivities for aromatic and aliphatic hydrocarbon products were similar to those of conventional catalysts. We also found that bulk ruthenium is an exceptionally efficient HDN catalyst. Furthermore, when a commercial CoMo catalyst was doped with ruthenium, a dramatic increase was seen in both the HDN activity of the catalyst and the selectivity to aromatic products. Task 3: We found that addition of acids to SRC-II liquid aids in removing the nitrogen, without concurrent polymerization. Also, in model systems, the addition of acids aids in the hydrogenation of quinoline to tetrahydroquinoline. 14 refs.
- Research Organization:
- SRI International, Menlo Park, CA (USA)
- DOE Contract Number:
- FG22-83PC60781
- OSTI ID:
- 6274499
- Report Number(s):
- DOE/PC/60781-9; ON: DE86005769
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CATALYSTS
CHEMICAL PREPARATION
COAL LIQUIDS
CATALYTIC EFFECTS
DENITRIFICATION
HYDROGENATION
COBALT
HYDROGEN SULFIDES
MOLYBDENUM
NICKEL
ORGANIC ACIDS
QUINOLINES
RUTHENIUM
ALUMINIUM OXIDES
AMMONIA
CATALYST SUPPORTS
HYDROGEN TRANSFER
RESEARCH PROGRAMS
SRC-II PROCESS
STRUCTURAL MODELS
SULFIDATION
TETRALIN
ALUMINIUM COMPOUNDS
AROMATICS
AZAARENES
AZINES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL LIQUEFACTION
ELEMENTS
FLUIDS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUEFACTION
LIQUIDS
METALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
PYRIDINES
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction