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Basic Concepts of Groundwater Hydrology
groundwater.ucdavis.eduductivity of clays, which consist of tiny particles that stick together and block water movement, is a tiny fraction of the hydraulic conductivity of a sandy aquifer: 0.001 gallon per day per square foot or less. The hydraulic conductivity of fractured rock depends greatly on the degree of fracturing. It may be as high as 10 to 100 gpd per
USE OF CLAYS AS PETROLEUM CRACKING CATALYSTS
www.clays.orgPart VII] CLAY TECHNOLOGY IN THE PETROLEUM INDUSTRY 315 HOUDRIFLOW FEED HEATER EXCESS FLUE GAS FIGURE 1 finery requirements, 0.5 to 1.5 tons of catal3'st are cir culated per barrel of crude charged.