Diffusivities of synthesis gas and Fischer-Tropsch products in slurry media. Quarterly report, September-December 1984

Technical Report · Tue Jan 01 00:00:00 EST 1985

OSTI ID:6243822

Akgerman, A

The goal of this research is to develop a fast and accurate method for measuring liquid diffusion coefficients for the Fischer-Tropsch system at temperatures from ambient to 573 K and pressures from ambient to 7 MPa. The Taylor dispersion technique will be utilized for measuring the diffusivities of carbon monoxide, hydrogen, heptane, octane, nonane, decane, and decanol in molten Fischer-Tropsch wax. The theoretical criteria for measuring diffusivities by the Taylor dispersion method have been given. In addition, the practical departures from an ideal experiment have been discussed; correction for the non-ideal conditions are found in Appendix B (Alizadeh et al., 1980). The effect of varying viscosity on secondary flow effects has been pointed out; it appears that under typical laboratory space limitations, using commercially available tubing, and with diffusivities on the order of 10/sup -9/ m/sup 2//s, it will not be possible to completely eliminate these effects. An apparatus for measuring diffusivity at high temperatures and pressures, where data has heretofore been scarce, is presented. With this apparatus rapid measurements may be made, and with the aid of computer control the measurements may be repeated and large volumes of data generated with minimum requirements of the operator. We anticipate our accuracy being between 0.5 and 4%. 20 references, 4 figures.

• Research Organization: Texas A and M Univ., College Station (USA). Dept. of Chemical Engineering
• DOE Contract Number: AC22-84PC70032
• OSTI ID: 6243822
• Report Number(s): DOE/PC/70032-T1; ON: DE85004921
• Resource Relation: Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
01 COAL, LIGNITE, AND PEAT
CARBON MONOXIDE
DIFFUSION
DECANE
DECANOLS
FISCHER-TROPSCH SYNTHESIS
HEPTANE
HYDROGEN
OCTANE
AMBIENT TEMPERATURE
HIGH TEMPERATURE
MASS TRANSFER
MEASURING INSTRUMENTS
MEASURING METHODS
MEDIUM PRESSURE
PRESSURE DEPENDENCE
RESEARCH PROGRAMS
TEMPERATURE DEPENDENCE
WAXES
ALCOHOLS
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
HYDROCARBONS
HYDROXY COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)
010405 - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
090221 - Alcohol Fuels- Chemical Synthesis- (1976-1989)