Microparticle formation in reverse micelles and (W/O) microemulsions in supercritical alkanes

Conference · Wed May 01 04:00:00 EDT 1991

OSTI ID:5568502

Zemanian, T S; Bean, R M; Fulton, J L; Linehan, J C; Smith, R D

Reverse micelle and microemulsion solutions constitute unique reaction media due to the small reaction volumes provided by the organized molecular assembly. We have formed very small (D<100 nm.) particles (MoO{sub 3},MoS{sub 2},FeS) in reverse (w/o) microemulsions using the surfactant DDAB (didodecyl-dimethylammonium bromide) in supercritical propane and butane. These particles may be formed either by condensation from aqueous solution or by reaction following mixing of micellar solutions containing complementary reactants. The micellar droplets containing these particles appear to be stable at temperatures as high as 155{degree}C. The structure of these surfactant aggregates at high temperature and the stability of the particles against aggregation are discussed. Results are also presented for the hydrogenation of naphthalene using micelle-bound catalyst particles in the supercritical fluid phase. 5 refs., 2 figs.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5568502
• Report Number(s): PNL-SA-18684; CONF-9105137--3; ON: DE91013224
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
&amp; Peat-- Hydrogenation &amp; Liquefaction
ALKANES
AMMONIUM COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
BUTANE
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COLLOIDS
DISPERSIONS
DISSOLUTION
EMULSIONS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
HYDROGENATION
IRON COMPOUNDS
IRON SULFIDES
MICELLAR SYSTEMS
MICROEMULSIONS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
MOLYBDENUM SULFIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROPANE
REFRACTORY METAL COMPOUNDS
SIZE
SULFIDES
SULFUR COMPOUNDS
SUPERCRITICAL STATE
SURFACE AREA
SURFACE PROPERTIES
SURFACTANTS
TRANSITION ELEMENT COMPOUNDS