Stirred tank metal removal

The PRH hydrolysate is discharged to a stirred tank, where the hydrolysis of agent is completed. Air is drawn through the PRH to remove volatile materials, and the gaseous effluent is passed through a CATOX, scrubber, and carbon filters prior to release to the plant s HVAC system. The solids, consisting of the washed munitions parts, go into the HDC that treats metal parts from the projectile agent removal system (Step 16), where they are decontaminated to a 5X level. 

A one-liter continuous stirred tank reactor (CSTR) was used in this study. A sintered metal filter was installed to remove the wax samples from the catalyst slurry. The wax sample was extracted through the internal filter and collected in the hot trap held at... 

If the size of the obtained polymer-heavy metal binding is suitable, the microfiltration membranes can be applied. For example, As(V) ions have been removed by adsorption onto chitosan in a continuous stirred tank reactor (CSTR) coupled with a microfiltration immersed-membrane unit using 350 hollow organic fibers, with a cutoff of 0.2 xm and a surface area of 0.2 m (Gerente et al,... 

I). Catalyst Activity It has been found that hydrodesulfurization of heavy gas-oil fractions in fixed-bed operation with a large product recycle (simulated stirred-tank operation) can be described as pseudo one-and-a-half order in sulfur concentration, whereas vanadium removal can be described as pseudo first order in vanadium concentration. We therefore used the following formula to calculate catalyst activity for desulfurization and metal removal ... 

V. Metal Removal and Catalyst Life in a (Simulated) Stirred-Tank Reactor... 

The decline in metal-removal activity of catalyst used in simulated stirred-tank reactor experiments may now be evaluated using the vanadium weight balance ... 

As illustrated in Fig. i+, a catalyst will reach Tg/yj when the effectiveness for metal removal has dropped to 0.5 In Fig. U we have plotted the values of rim at Tgyyj for various catalysts and tests conditions as a function of experimentally estimated Tg from the desulfurization performance. On the basis of these observations we used rim = 0.5 as a new definition of TgAp simulated stirred-tank experiments the following expression can then be derived, which allows us to calculate for desulfurization,... 

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