Development of unique catalysts for hydrodenitrogenation of coal-derived liquids

Technical Report · Fri Feb 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/5156405· OSTI ID:5156405

Katzer, J. R.; Stiles, A. B.; Kwart, H.

Experimental runs using decahydroquinoline as a reactant have been made. It would appear that hydrodenitrogenation requires an acidic site and a basic site for the ..beta..-elimination reaction to occur. Runs have also been made using sulfided and unsulfided catalysts. Previously, it was thought that the sulfur formed during sulfiding of the catalyst could block the active sites of the catalyst and inactivate it. However, there was no significant difference in nitrogen removal rate between the sulfided and unsulfided catalyst, indicating that sulfiding of these catalysts does not deactivate them. Several catalysts have been prepared and tested with the emphasis on understanding the nature of catalyst function responsible for carbon-nitrogen bond scission. The catalysts tested include catalysts with Co and Ni impregnated on silica-alumina or ..gamma..-alumina supports. However, neither one displayed adequate nitrogen removal rates. The rate of nitrogen removal was highest for the molybdenum on ..gamma..-alumina catalyst. Several catalysts were prepared with the objective of developing new hydrodenitrogenation catalysts which would selectively coordinate the nitrogen atom and remove it without hydogenating the entire ring. Catalysts prepared by coprecipitation and by impregnation were compared for their nitrogen removal rates, using decahydroquinoline as the reactant. Preliminary results indicate that the catalyst prepared by coprecipitation removed nitrogen much more quickly than the impregnation-type catalyst. From these results and using the criteria of chemical and mathematical feasibilities, a network for the hydrodenitrogenation of decahydroquinoline has been hypothesized.

• Research Organization: Delaware Univ., Newark (USA). Dept. of Chemical Engineering
• DOE Contract Number: AS01-78ET03297
• OSTI ID: 5156405
• Report Number(s): FE-3297-5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CATALYSTS
CHEMICAL PREPARATION
COMPARATIVE EVALUATIONS
COAL LIQUIDS
DENITRIFICATION
REFINING
HYDROGENATION
CHEMICAL BONDS
CLEAVAGE
COAL
COAL LIQUEFACTION
STRUCTURAL MODELS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
ENERGY SOURCES
FOSSIL FUELS
FUELS
LIQUEFACTION
MICROSTRUCTURE
PROCESSING
SYNTHESIS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction