Evaluation of Demonstration Test Results of Alternative Technologies for Demilitarization of Assembled Chemical Weapons A Supplemental Review for Demonstration II (2001) / Chapter Skim
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2 AEA Silver II™ Technology Process
2 AEA Silver II™ Technology Process
Pages 10-22
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From page 10... ...
The chlorinated feeds from which the silver chloride was formed were either agents or agent simulants, which were introduced into a premix vessel from which they were metered into the anolyte vessel. A single hydrocyclone was installed in the anolyte circuit to remove the solids and prevent their accumulation in the electrochemical cell.
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From page 11... ...
The solution in the anode compartment circulates around a closed loop through a titanium anolyte vessel that has a volume of 600 L The solution in the cathode compartment circulates around a separate closed loop.
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From page 12... ...
· Characterize gas, liquid, and solid process streams. One agent simulant, DMMP, was tested in the 12 kW test unit (no agent was tested)
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From page 13... ...
The slurries were prepared in batches and kept well stirred in a storage vessel until they were pumped into the anolyte vessel for destruction. The feed rate was adjusted to maintain a minimum level of energetic material in the anolyte circuit at any time.
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. difficulties encountered in processing tetrytol were attributed to the formation of recalcitrant intermediate products that either crystallize in the anolyte circuit or migrate through the membrane to the catholyte circuit before crystallizing.
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From page 15... ...
During the M28 propellant tests, lead dioxide precipitated on the cell membrane, so it is possible that the precipitation of lead with the small amount of picric acid that might be present does not compete with the formation of lead dioxide in the electrochemical cell. However, the possibility of lead picrate precipitation cannot be dismissed a priori.
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From page 16... ...
The liquid discharges from the anolyte circuit, catholyte circuit, NOX reformer, and caustic scrubber were sampled and analyzed for metals and organics. At the time of this report, not all of the data were available to the committee.
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From page 17... ...
Some of the changes are listed below: addition of a CATOX unit to control VOCs in offgases use of hydrocyclones in both the anolyte and catholyte circuits addition of a return flow of material (both solids and liquids) from the catholyte to anolyte to return organics that have migrated across the cell membrane addition of a high-shear vortex mixer in the anolyte circuit to achieve better mixing of the tetrytol to promote the oxidation of intermediate products that precipitate addition of chemical cleaning processes for electrodes to remove the buildup of lead and AgC1 addition of an energetic rotary deactivator for the destruction of separated fuzes and supplemental charges AEA proposes adding an impurities removal system (IRS)
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From page 19... ...
4. All effluents must be characterized in detail when treating agents contaminated with metals from disassembled chemical weapons (i.e., potential trace species and reaction by-products, such as nitrated hydrocarbons, partially oxidized products, and metals, must be identified)
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From page 20... ...
the addition of a hydrocyclone in the catholyte circuit and anolyte circuits, (2) the addition of a high-shear vortex mixer in the anolyte and catholyte circuits, (3)
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From page 21... ...
The most pressing issues are the following: . longer reaction times for larger particles · mixing limitations in larger anolyte vessels less effective performance of larger hydrocyclones · formation of additional soluble by-products · need for recirculation of catholyte solution to the anolyte vessel to control organics passing through the cell membrane · control issues associated with a fully integrated pilot plant Although none of these issues is likely to preclude the use of this technology, resolving the uncertainties will require comprehensive, time-consuming, integrated, pilot-scale development and systemization.
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From page 22... ...
The discovery of organic material migration across the electrochemical cell membrane will require major modifications in design and operation, such as recycling of the catholyte material to the anolyte circuit and the addition of hydrocyclones in the catholyte circuit. Finding DII AEA-3.
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