Catalytic Interactions of Rhodium, Ruthenium, and Mercury During Simulated DWPF CPC Processing With Hydrogen Generation

Statistical Evaluation of Processing Data From the Rh Ru Hg Matrix Study

“…Preliminary data and conclusions were given in an earlier report. 10 This final report concludes the work on the Rh-Ru-Hg matrix study. Modeling results are summarized below.…”

“…9 Experimental results from twelve initial Rh-Ru-Hg process simulations have also been documented. 10 Ag and Pd were fixed at 0.003 and 0.001 wt% of total solids, respectively, in the Rh-Ru-Hg matrix testing. Rh, Ru, and Hg were varied from 1/3 to 5/3 of the preliminary flowsheet study values (0.0078, 0.030, and 1.50 wt% of total solids respectively).…”

Srat Chemistry and Acid Consumption During Simulated DWPF Melter Feed Preparation

“…26,12 Insoluble carbonate seemed to be adequately accounted for in the Ca and Mg terms. Ca(OH) 2 is sufficiently soluble that it should convert to CaCO 3 over time in the presence of the dissolved carbonate in waste supernate.…”

“…Generally, the expense of measuring the concentration of a given cationic elemental species in the slurry as a function of time is not justified, since everything non-volatile put in the SRAT vessel stays in the vessel. The calculation of the total concentration of a species in the SRAT as a function of time can be approached from several The total mass concentration of a given species at a given time is then calculated simply as [12] Neglecting the masses of small slurry samples (~15 g out of 17,000 g), along with the mass of the species removed in the sample, is a trivially small potential source of error when compared to actual run data.…”

“…Data from supporting tests with the same simulant in the Rh-Ru-Hg matrix study indicate that the reduction of mercury occurred as the pH initially fell to seven over about a twenty minute interval included in Period 2 and probably nearly immediately after Period 1. 12 Mercury reduction probably either preceded or paralleled the dissolution of Mg(OH) 2 .…”