Designs of Column Separation Processes for Recovery of Molybdenum from Dissolved High-Density LEU Target - Further Studies

Abstract

Estimation of the Mo Intraparticle Diffusivity Values for S40 from Breakthrough Curves .

VERIFICATION OF COLUMN DESIGN FOR RECOVERY OF Mo FROM LOW-ENRICHED URANIUM TARGET USING IRRADIATED TARGET TRACER SOLUTION

“…In a previous report (Stepinski et al, 2012), column designs for Sachtopore sorbent S40 with 40-µm particle size, were determined using isotherms parameters for S80 sorbent. In this report we have determined Langmuir isotherm parameters for S40 sorbent and using VERSE simulation program (Purdue University) have estimated intraparticle diffusivity using the updated Langmuir isotherm parameters.…”

“…In this report we have determined Langmuir isotherm parameters for S40 sorbent and using VERSE simulation program (Purdue University) have estimated intraparticle diffusivity using the updated Langmuir isotherm parameters. Langmuir isotherm parameters for uptake of Mo from 450 g-U/L solution, 1 M H + solution on S40 sorbent were obtained using batch equilibrium data for samples equilibrated 24 h at 60 °C as described previously (Stepinski et al, 2012). Langmuir isotherm parameters were fitted using Origin 9.1 and are a = 347, b = 0.5 mM -1 (Figure 1).…”

“…The process is designed for a feed solution that contains ~7 mM Mo and ~450 g-U/L, and the nitric acid concentration after dissolution is ~1 M. The volume of solution is assumed to be 500 mL, and the pressure drop (∆P) constraint is 0.8 atm based on use of vacuum/gravity fluid-transfer system. The 3.5 x 5 cm column was tested experimentally at 60 °C using a 1 M H + solution with 450 g-U/L, 7 mM Mo, and tracer levels of Mo-99 (Stepinski et al, 2012). Loading velocity and column length were kept constant at 2.60 cm/min and 5 cm, respectively, while the column ID and solution volume were reduced to 1 cm and 40.8 mL, respectively.…”