Cake properties

Cake properties Slurry feed properties Equipment properties... 

Physical characteristics Molecular weight Vapour density Specific gravity Melting point Boiling point Solubility/miscibility with water Viscosity Particle size size distribution Eoaming/emulsification characteristics Critical temperature/pressure Expansion coefficient Surface tension Joule-Thompson effect Caking properties... 

Clays or shales have the ability to absorb water, thus causing the instability of wells either because of the swelling of some mineral species or because the supporting pressure is suppressed by modification of the pore pressure. The response of a shale to a water-based fluid depends on its initial water activity and on the composition of the fluid. The behavior of shales can be classified into either deformation mechanisms or transport mechanisms [1765]. Optimization of mud salinity, density, and filter-cake properties is important in achieving optimal shale stability and drilling efficiency with water-based mud. 

U) Caking property is not strong hut some are of extremely high fluidity. 

Fusain (Mother of Coal or Mineral Charcoal). See Vol 3 of Encycl, p C353-R and in Cond-ChemDict (1961), 521-R. It reduces the caking properties of the coal in which it occurs... 

In the agglutinating value test, the caking properties of the coal are progressively destroyed by the addition of sand of specified characteristics until the coal-sand mixture, on carbonization under controlled conditions, just fails to satisfy one or both of two conditions. 

Plastic/agglutinating Changes in a coal upon heating caking properties of coal... 

Early work on the solvent extraction of coal was focused on an attempt to separate from coal a coking principle (i.e., the constituents believed to be responsible for coking and/or caking properties). But solvent extraction has actually been used to demonstrate the presence in coal of material that either differed from the bulk of the coal substance or was presumed to be similar to the bulk material. 

Scaling up of a filter is relatively straightforward. If you do lab experiments with a Buchner fimnel, and use the same feed, medium and pressure drop as on a large scale, you can expect the same cake properties. 

The overall performance of the system in terms of SO2 removal, chemical requirements, and properties of the waste cake is summarized in Table II. The performance data is based on overall material balances derived from flue gas analyses, waste cake properties and discharge rates, and raw materials feedrates and inventories. 

Both of these problems, their causes, and impacts have already been discussed. The losses in the cake were addressed in the discussion of cake properties and liquor losses were addressed in the discussion of oxidation and sulfate precipitation. It is reasonable to assume that had the mechanical problems and corresponding impacts on the process operation not been present, the makeup rate could have been limited to the design condition. This was clearly demonstrated during the earlier pilot plant tests where soda ash makeup rates amounted to an equivalent of 5 mole % of the SO2 removed. 

Eylander used core flood tests to predict filter cake properties. Equations 23 and 24 can be used to determine the injections well s half time (a = 0.5). Eylander, however, suggested further research is needed to better determine the invasion depth, D. 

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