Automation of a hydrogen probe for determination of hydrogen solubilities in coal liquids solvents
The Hydrogen Probe Equipment developed in our laboratory was automated in order to improve the data acquisition of the variables involved in the process: temperatures, pressures and the time of travel for the mercury bead. The equipment was tested by studying the hydrogen-tetralin, hydrogen-tetralin-methane and hydrogen-tetralin-ethane systems. A 300-ml autoclave equipped with a magnetically driven agitator was used as an equilibrium cell. The in-situ hydrogen probe was used to measure the hydrogen partial pressure in the mentioned systems. The partial pressure of methane was varied from 0 to 1000 psi while the temperatures were 325/sup 0/C and 375/sup 0/C. The ethane partial pressure was varied from 0 to 585 psi and the temperatures were 360/sup 0/C and 395/sup 0/C. For the hydrogen-tetralin system, the temperatures were 350/sup 0/C and 390/sup 0/C. Results from the hydrogen-tetralin system show good agreement when compared with literature data. As they show, the solubility of hydrogen in tetralin increases when the temperature and pressure are increased. For the ternary systems, it was found that the hydrogen solubility in tetralin increased when the partial pressure of the third component added (methane or ethane) was increased and the partial pressure of hydrogen was held constant. The experimental values for the K-value for hydrogen and tetralin where compared with the predicted value by using the correlations proposed by Chao and Seader in 1961 for tetralin and the correlation proposed by Sebastian et al. in 1980 for hydrogen. The experimental values show a good agreement with the values predicted by using these correlations. Besides the experimental work, a commercial hydrogen probe system was constructed to be used in the plant that Catalytic Inc. operates in Wilsonville, Alabama. 41 refs., 65 figs., 32 tabs.
- Research Organization:
- Pittsburgh Univ., PA (USA). Dept. of Chemical and Petroleum Engineering
- DOE Contract Number:
- FG22-84PC71257
- OSTI ID:
- 6258756
- Report Number(s):
- DOE/PC/71257-T12; ON: DE87013646
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
08 HYDROGEN
COAL LIQUIDS
SOLVENT PROPERTIES
HYDROGEN
MEASURING INSTRUMENTS
SOLUBILITY
AUTOMATION
ACTIVATION ENERGY
ADSORPTION
CALIBRATION
COMMERCIALIZATION
CREOSOTE
DESORPTION
DIFFUSION
DISSOCIATION
EQUILIBRIUM
ETHANE
FLOWMETERS
GAS CHROMATOGRAPHY
LIQUIDS
MEASURING METHODS
METHANE
NICKEL
PARTIAL PRESSURE
PERMEABILITY
PHASE STUDIES
PRESSURE DEPENDENCE
PRESSURE MEASUREMENT
SRC-II PROCESS
TEMPERATURE DEPENDENCE
TETRALIN
VAPOR PRESSURE
VAPORS
ALKANES
AROMATICS
CHROMATOGRAPHY
COAL LIQUEFACTION
ELEMENTS
ENERGY
FLUIDS
GASES
HYDROCARBONS
LIQUEFACTION
METALS
METERS
NONMETALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
SORPTION
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
010600* - Coal
Lignite
& Peat- Properties & Composition
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
080800 - Hydrogen- Properties & Composition