Particles specific surface

The structure of the cake formed and, consequently, its resistance to liquid flow depends on the properties of the solid particles and the liquid phase suspension, as well as on the conditions of filtration. Cake structure is first established by hydrodynamic factors (cake porosity, mean particle size, size distribution, and particle specific surface area and sphericity). It is also strongly influenced by some factors that can conditionally be denoted as physicochemical. These factors are ... 

Support particles Specific surface area (m /g) Yield (%) Size of Pt02 H20 (nm) Size of Pt (nm)... 

Polydisperse. 15-70 nm porous particles specific surface area = 100-300 m2 g l (20)... 

Figure 7. Electron micrograph of stishovite particles. Specific surface area is 20.6 sq. meters/gram (X24,000)...

The particle shape determines the particles specific surface area and the observed order in increasing codeposition of the AI2O3 particle shapes corresponds to a decrease in the specific surface area.108 The amount of... 

Area, or total surface area of particles Specific surface area of particles, m g or ft /lb Volume shape factor [Eq. (28.10)]... 

Traditionally filterability is correlated to particle size by the Kozeny-Carman equation expressed as a specific cake resistance, r as a function of particle specific surface area Sq, solids density p, and cake porosity e ... 

The main substance content in the final powders is usually no less than 99.0-99.5%. The particles specific surface has a wide range of values due to the fiber structure, and depending on the final product it reaches 10-40 m g. ... 

To 1 liter of solution containing 350 ppm monomeric silica at pH 9. at 22 C, was added a small amount of a concentrated silica sol of 8 nm particles (specific surface area 350 m g ) to give a concentration of 3.0 g 1 colloidal silica. At once the monomer content was followed as it dropped over a period of 12 hr. In the first 12 min the concentration dropped from 350 to 250 ppm, or a rate of 500 ppm hr. Thus 0.500 g was deposited on 1050 m of silica surface. The rate was thus about 0.5 grams per 1000 m hr. ... 

Consider a dispersion with a particle concentration p (in weight fraction). The total added amount of surfactant, at a certain surface tension y, is VCq, where V is the added volume of surfactant solution with a concentration of Co- The total adsorbed amount of surfactant is then VCo — VtotCiy), where C(y) is the equilibrium surfactant concentration corresponding to the specific surface tension, y, and hence corresponding to the adsorption F(y), and Vtot is the total volume of the dispersion. Setting the particle specific surface area to asp we then have the following ... 

Replacing the bed specific surface area by the corresponding particle specific surface area and voidage... 

Gu H, Yang Z, Gao J, Zhang C, Xu B (2005) Heterodimers of nanoparticles formation at a liquid-liquid interface and particle-specific surface modification by functional molecules. J Am Chem Soc 127 34—35... 

Specific Gravity Av>erage Particle Specific Surface Area... 

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