PDF Publication Title:
Text from PDF Page: 004
Ventura, Bhamidi and Hornbostel The lithium separation coefficients were calculated as follows: Li/Me = QLi/CLi * CMe/QMe where QLi and QMe are the adsorption capacities of Li and a generic metal ion Me in the polymer (mg Li or Me/g sorbent), and while CLi and CMe are the concentrations of Li and metal ion Me in the brine (mg Li or Me/L brine) tested. The concentration of lithium ion and other metal ions were tested by ion exchange chromatography. 3.4 Lithium Adsorption Tests The hybrid sorbent generation was tested for its lithium adsorption and selectivity under variable conditions, including pH, composition and temperature. In a typical experiment, the hybrid nanocomposite fixed bed was tested for its adsorption of Li+ from a synthetic brine containing 255 ppm Li, 10570 ppm Na and 10400 ppm of K in a pH 6 0.4M sodium phosphate buffer solution. The brine was passed through the column at a flow rate of 27 BV/hr (where BV is the bed volume defined as BV= Lr2 with L equal to the length of the sorbent packed bed and r is the radius of the column) and the exiting brine was collected in small fractions. The lithium content of each fraction was measured, and the adsorption experiment was continued until the sorbent was saturated and the exiting brine had the same lithium content as the feed. The sharp breakthrough adsorption curve (Figure 4) indicates that the lithium uptake is fast. Figure4.Breakthrough curve of Li+ from a fixed-column packed with the hybrid nanocomposite sorbent. The brine’s tested composition was: 255 ppm Li, 10570 ppm Na and 10400 ppm of K in a pH 6 0.4M sodium phosphate buffer solution. T= 70oC, flow rate 27 BV/hr. The lithium capacity and selectivity in the presence of high concentrations of Na and K ion are shown in Table 1. It should be noted that, the lithium capacity is calculated from the amount of the lithium released by treatment with 0.5 M HCl, after the sorbent was saturated with Li. Table 1. Sorbent Li capacity and selectivity in synthetic brines at variable pH pH Li brine conc. (mg/L) Na brine conc. (mg/L) K brine conc. (mg/L) Mg brine conc. (mg/L) Ca brine conc. (mg/L) Li capacity (mg Li/g sorbent) Sep. Sep. coeff. coeff Sep. Sep. coeff coeff Li/Mg Li/Ca Li/Na Li/K 7.2 250 17134 10749 - - 16.2 323 107 - - 6 255 10570 10400 - - 14.2 211 77 - - 5 242 10059 - 964 9250 10.8 198 - High * 71 Experimental conditions: flow rate 27BV/hr, temperature 70oC. (*) no Mg uptake was detected. The binding capacity of Mg from synthetic brines containing 964 mg/L of Mg2+ was found to be negligible, with no detected Mg uptake under the experimental conditions summarized in Table 1, therefore, we could not calculate an actual separation coefficient. 4PDF Image | Selective Recovery of Lithium from Brines
PDF Search Title:
Selective Recovery of Lithium from BrinesOriginal File Name Searched:
Ventura.pdfDIY PDF Search: Google It | Yahoo | Bing
Product and Development Focus for Infinity Turbine
ORC Waste Heat Turbine and ORC System Build Plans: All turbine plans are $10,000 each. This allows you to build a system and then consider licensing for production after you have completed and tested a unit.Redox Flow Battery Technology: With the advent of the new USA tax credits for producing and selling batteries ($35/kW) we are focussing on a simple flow battery using shipping containers as the modular electrolyte storage units with tax credits up to $140,000 per system. Our main focus is on the salt battery. This battery can be used for both thermal and electrical storage applications. We call it the Cogeneration Battery or Cogen Battery. One project is converting salt (brine) based water conditioners to simultaneously produce power. In addition, there are many opportunities to extract Lithium from brine (salt lakes, groundwater, and producer water).Salt water or brine are huge sources for lithium. Most of the worlds lithium is acquired from a brine source. It's even in seawater in a low concentration. Brine is also a byproduct of huge powerplants, which can now use that as an electrolyte and a huge flow battery (which allows storage at the source).We welcome any business and equipment inquiries, as well as licensing our turbines for manufacturing.CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)