Effect of catalyst acidity on the hydrogen-donor content of a hydrotreated coal liquid

• Published in: IEEE transactions on energy conversion Vol. 28; no. 8; pp. 1156 - 1162
• Main Authors: McCormick, Robert L, Haynes, Henry W, Netzel, Daniel A
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01-08-1989
• Subjects: 01 COAL, LIGNITE, AND PEAT; 010405 - Coal, Lignite, & Peat- Hydrogenation & Liquefaction; 010600 - Coal, Lignite, & Peat- Properties & Composition; 400201 - Chemical & Physicochemical Properties; ACIDIZATION; Applied sciences; CARBON 13; CARBON ISOTOPES; CATALYSTS; CATALYTIC CRACKING; CHEMICAL REACTION KINETICS; CHEMICAL REACTIONS; CHEMICAL REACTORS; COAL LIQUEFACTION PLANTS; COAL LIQUIDS; CRACKING; DECOMPOSITION; Energy; EVEN-ODD NUCLEI; Exact sciences and technology; FLUIDS; Fuel processing. Carbochemistry and petrochemistry; Fuels; HYDROGENATION; INDUSTRIAL PLANTS; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ISOTOPES; KINETICS; LIGHT NUCLEI; LIQUIDS; NMR SPECTRA; NUCLEI; PH VALUE; PYROLYSIS; REACTION KINETICS; Solid fuel processing (coal, coke, brown coal, peat, wood, etc.); SPECTRA; STABLE ISOTOPES; THERMOCHEMICAL PROCESSES; Mixed catalyst; Coal liquids; Analysis method; Hydrotreating; Acidic site; Nickel; Nuclear magnetic resonance; Catalyst activity; Cobalt; Molybdenum; Supported catalyst; Catalyst
• ISSN: 0888-5885; 0885-8969; 1520-5045; 1558-0059
• DOI: 10.1021/ie00092a007

Nine catalysts were used to hydrotreat a coal-derived distillate in a fixed bed reactor. These catalysts were prepared from a variety of different support materials and exhibited a wide range of surface acid site densities. Liquid produce was collected in each run after approximately 200 h on stream and analyzed by /sup 1/H and /sup 13/CNMR methods for estimating the fraction of donatable hydrogen. The results suggest that hydrogen-donor content decreases with increasing catalyst acidity, probably because the acid sites catalyze isomerization and cracking reactions. It is suggested that some benefit could be derived in coal liquefaction process by employing low acidity catalysts.