Experimental study of catalytic hydrogenation by using an in-situ hydrogen measuring technique. Final report
An in-situ technique for measuring hydrogen concentration (partial pressure) had been previously used to measure static properties (hydrogen solubilities, vapor pressures of hydrocarbons, etc.). Because of its good precision (2% relative error) and relatively short respond time (9.7 to 2.0 seconds at 589 to 728K), the technique was successfully applied to a dynamic study of hydrogenation reactions in this work. Furthermore, the technique is to be tested for industrial uses. Hydrogen/1-methylnaphthalene system was experimentally investigated in a one-liter autoclave equipped with a magnetically driven stirrer and temperature controlling devices. Catalytic hydrogenation of 1-methylnaphthalene was studied in the presence of sulfided Co-Mo-Al2O3 catalyst. In addition, the vapor/liquid equilibrium relationship was determined by using this technique. Hydrogenation reaction runs were performed at temperatures of 644.1, 658.0 and 672.0K and pressures up to 9.0 MPa. The ring hydrogenation, resulting in 1- and 5-methyltetralin, was found to be the dominant reaction. This is in agreement with cited literature. Effects of hydrogen partial pressure, operating temperature, as well as presulfided catalyst are also investigated and discussed in this work. The vapor pressure of 1-methylnaphthalene was measured over a temperature range of 555.2 to 672.0K. The results are in good agreement with literature data. Measurements for hydrogen solubility in 1-methylnaphthalene were conducted over temperature and pressure range of 598 to 670K and 5.2 to 8.8 MPa, respectively. Similar to previously reported results, the hydrogen solubility increases with increasing temperature when total pressure is held constant. A linear relation is found between the hydrogen solubility and hydrogen partial pressure. 21 refs., 13 figs., 10 tabs.
- Research Organization:
- Pittsburgh Univ., PA (USA). Dept. of Chemical and Petroleum Engineering
- DOE Contract Number:
- AC22-82PC51253
- OSTI ID:
- 6281318
- Report Number(s):
- DOE/PC/51253-T1; ON: DE86005077
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM OXIDES
CATALYTIC EFFECTS
SULFIDATION
CONDENSED AROMATICS
HYDROGENATION
SOLVENT PROPERTIES
HYDROGEN
PARTIAL PRESSURE
SOLUBILITY
VAPOR PRESSURE
MOLYBDENUM
AUTOCLAVES
COBALT
CORRELATIONS
EQUILIBRIUM
EXPERIMENTAL DATA
HIGH TEMPERATURE
LIQUIDS
MEASURING METHODS
MEDIUM PRESSURE
STRUCTURAL MODELS
TEMPERATURE DEPENDENCE
VAPORS
ALUMINIUM COMPOUNDS
AROMATICS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELEMENTS
FLUIDS
GASES
INFORMATION
METALS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
010403* - Coal & Coal Products- Hydrogenation- (-1987)
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction