Now showing items 21-30 of 87
Stabilization mechanism of colloidal suspensions by gum tragacanth: The influence of pH on stability
(Elsevier, 1988-11)
An acidic polyelectrolyte, gum tragacanth (GT), was found to stabilize polystyrene latex particles due to a steric stabilization mechanism. The stability depends significantly on the pH of the solution. To elucidate the ...
Prediction and measurement of initial flocculation rates in quiescent media
(Elsevier, 1985-12)
Initial flocculation rate experiments were carried out with a dilute suspension of bidisperse polystyrene spheres (0.166 and 0.255 [mu]m in radius) under normal gravity conditions and, using a centrifuge, under conditions ...
Fischer-tropsch synthesis on charcoal-supported molybdenum: The effect of preparation conditions and potassium promotion on activity and selectivity
(Elsevier, 1985)
High dispersion and high activity charcoal-supported molybdenum catalysts were prepared using incipient wetness and equilibrium adsorption methods. Activities and selectivities of these catalysts were tested after reducing ...
Report on the catalytic activity of 6-heteropolymolybdates as potential Fischer-Tropsch synthesis catalysts
(Elsevier, 1986-02-14)
Unsupported and supported decomposition products of 6-heteropolymolybdates were tested as possible Fischer-Tropsch synthesis catalysts. Depending on the heteroatom, the activity changes significantly and the best supported ...
Fluid flow and heat transfer, Aksel L. Lydersen, x + 357 pp., John Wiley & Sons, New york, 1979, $42.50
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1982-09)
No Abstract.
Effects of Humic Acid on the Adsorption of Tetrachlorobiphenyl by Kaolinite
(American Chemical Society, 1988-12-15)
Humic acids (HA) can affect the partitioning of organic contaminants
between aqueous and sediment phases by complexation in solution
and adsorption of the contaminant-HA complex to a mineral surface.
The objective of ...
CO hydrogenation on Ru/Al2O3: Selectivity under transient conditions
(Elsevier, 1987-06)
Transient response and isotopic tracer techniques were used to investigate the surface coverages of the reactants and the selectivity of ruthenium/alumina catalysts in CO hydrogenation. Two forms of carbon--active carbidic ...
Emulsion stability: Delineation of different particle loss mechanisms
(Elsevier, 1981-01)
The kinetics of the emulsion-breaking process are governed by three different particle loss mechanisms: Brownian flocculation, sedimentation flocculation, and creaming. Various particle loss mechanisms have been delineated ...
Rate enhancements and quasi-periodic dynamics during forced concentration cycling of CO and O2 over supported Pt---SnO2
(Elsevier, 1988)
Forced reactant cycling of carbon monoxide-nitrogen and oxygen-nitrogen streams over Pt---SnO2 in a differential reactor results in enhancements of the reaction rate of up to 9 times that of the optimal steady state. Dynamic ...
Dissolution kinetics: Catalysis by strong acids
(Elsevier, 1981-07)
The dissolution of silicate minerals in mixtures of hydrofluoric acid and strong acids such as HCl is catalyzed by H+ ions adsorbed at the mineral surface. Studies of the catalyzed dissolution of kaolinite, quartz, potassium ...