Enhanced catalysts for hydrodenitrogenation of coal liquids: Appendix A

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6895316

Hirschon, A S; Laine, R M; Wilson, Jr, R B

Two approaches to the development of improved HDN catalysts are being investigated. One approach is to synthesize high-activity, highly dispersed, ''surface-confined'' catalysts based on organometallic cluster complexes. The second approach is to examine the hydrotreating activities of metals not currently used in HDN and HDO catalysis. This second method arises from homogeneous modeling studies for the transalkylation reaction and from studies of bulk metals on the HDN of tetrahydroquinoline. From the results of these studies the investigators have found that ruthenium exhibits the highest activity for C-N bond cleavage. In this paper the syntheses and HDN activities of catalysts prepared using these two approaches are described. The conclusion is that both surface-confining techniques and metal-promotion with an active amine transalkylation catalyst such as Ru/sub 3/(CO)/sub 12/ greatly enhances the activity of CoMo or NiMo HDN catalysts. Not only are the activities of the RuCoMo and RuNiMo catalysts greater, but also the selectivity towards aromatic products are higher. Furthermore, unlike with bulk metals, these ruthenium promoted catalysts are sulfur tolerant. The exact mechanism of the promotion will require more detailed work. However, these preliminary results are highly significant with regard to the need to develop improved HDN catalysts that can remove nitrogen with a minimum amount of hydrogen consumption. 6 refs., 1 fig., 1 tab.

• Research Organization: SRI International, Menlo Park, CA (USA)
• DOE Contract Number: FG22-85PC80906
• OSTI ID: 6895316
• Report Number(s): CONF-870410-21; ON: DE87009365
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
AZAARENES
AZINES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COAL LIQUIDS
COBALT
COMPARATIVE EVALUATIONS
DENITRIFICATION
ELEMENTS
FLUIDS
HETEROCYCLIC COMPOUNDS
HYDROGENATION
LIQUIDS
METALS
MOLYBDENUM
NICKEL
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
PROMOTERS
PYRIDINES
QUINOLINES
RUTHENIUM
SULFIDATION
SYNTHESIS
TRANSITION ELEMENTS