Tracer injection

Impulse An amount of tracer injected instantaneously into a vessel at time zero. The symbol m5(t — a) represents an impulse of magnitude m injected at time t = a. The effluent concentration resulting from an impulse input is designated Cg. 

Linearity with respect to the tracer analysis, that is, the magnitude of the response at the outlet is directly proportional to the amount of tracer injected. 

Using Equation 8-51 it is possible to determine E(t) from die measured response C(t), if bodi die volumetric flowrate u and die mass of tracer injected ni are known. Since die mass of tracer emerging in die interval from t and t -i- 6t is C(t)u6t, dien die total quantity of die tracer is ... 

G. L. Stegemeier and G. E. Perry. Method utilizing spot tracer injection and production induced transport for measurement of residual oil saturation. Patent US 5168927, 1992. 

Stalker L., Boreham C., et al. Geochemical monitoring at the C02CRC Otway project tracer injection and reservoir fluid acquisition. 2009 Energy Procedia 1 2119-2125. 

Figure 33. Tracer gas contour profiles—tracer injected via conical grid.

Figure 37. Effect of solids loading on gas mixing among concentric jets—tracer injected via air tube at air tube gas velocity of 31 m/s.

NDS is about 48% or 192 kg out of 400 kg injected (combined mass tracer recovery on all wells affected by 1,6). The residual 52% of the tracer injected possibly dispersed to the reservoir. The bulk of the tracer recovered was obtained in well SK2D amounting to 31% of the tracer mass injected (124 kg) or 65% of the total tracer recovered. Presence of direct structural connection between MT2RD and SK2D through Mook East and proximity of the two wells to each... 

Kimball, B.A. 1997. Use of tracer injections and synoptic sampling to measure metal loading from acid mine drainage. U.S. Geological Survey Fact Sheet FS-245-96. 

Goodwin PB, Shepherd V, Erwee MG. Compartmentation of fluorescent tracers injected into the epidermal cells of Egeriadensalsmss. Planta 1990 181 129-136. 

In studying residence time distribution in a tank-flow electrolyzer, a tracer injected into it is recovered in a mixing tank placed downstream. If both tanks are perfectly stirred, then with a tracer pulse, the mole balance for the tracer can be written as... 

Bencala KE, McKnight DM, Zellweger GW (1990) Characterization of transport in an acidic and metal-rich mountain stream based on a lithium tracer injection and simulations of transient storage. Water Resour Res 26 989-1000... 

BOLUS TRACER INJECTION Bond-cleavage, light-induced,... 

When velocity profiles are present across the cross-sections of the tracer injection and sampling points, then great care must be taken over the appropriate tracer injection and collection methods if the true system RTD is to be recovered (see, for instance, ref. 4 and also refs. 12 and 26). Our attention is, for the moment, restricted to situations where flat velocity profiles are present. 

The curve which describes the concentration-time function of tracer in the exit stream of any vessel in response to an idealized instantaneous or pulse tracer injection is called the C curve. Such an input is often called a delta-function input. As with the F curve, dimensionless coordinates are chosen. Concentrations are measured in terms of the initial concentration of injected tracer if evenly distributed throughout the... 

The function f(R) becomes l/Ro , since injection is uniform over the entire plane. The rate of tracer injection, /, is now a function of time. If we define Give as the concentration of injected tracer if evenly distributed throughout the vessel, for a perfect pulse input, we have... 

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