PDF Publication Title:
Text from PDF Page: 023
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 2; therefore, the team could not reliably calculate an actual separation coefficient. The three synthetic brines in Table 2 were prepared from buffer solutions to simulate the pH of geothermal brines. Sodium phosphate solutions were used for the pH 7.2 and 6 buffers, while an acetic acid/sodium acetate solution was used for the pH 5 buffer. The sorbent lithium capacity for all three brines was greater than 10 mg Li/g sorbent, and as high as 16.2 mg Li/g sorbent for the brine at pH 7.2. Higher lithium separation coefficients were obtained for the second-generation sorbent. Adsorption tests were performed by varying the adsorption temperature and using a synthetic brine at pH 5 that contained concentrations of Li, Na, K, and Ca comparable to those found in California’s Salton Sea geothermal brines (Table 3). Thus, the brine tested contained 377 mg/L of Li, 57,777 mg/L of Na, 14,448 mg/L of K, and 26,766 mg/L of Ca. Even in the presence of a high concentration of other metal ions, the sorbent lithium capacity was greater than 11mg Li/g sorbent at 158°F (70°C) with a Li separation coefficient of 3,855 compared to Na, 211 compared to K, and 119 compared to Ca. When the adsorption process was conducted at 122°F (50°C) and 86°F (30°C), the lithium capacity of the sorbent was still greater than 10 mg Li/g sorbent with high selectivity. Table 3: Sorbent Lithium Capacity and Separation Coefficient in Complex Simulated Brine T (oC) Li capacity (mg Li/g sorbent) Li Separation Coefficient Li/Na Li Separation Coefficient Li/K Li Separation Coefficient Li/Ca 70 11.25 3855 50 10.12 3876 30 10.16 1351 211 119 185 109 164 136 Brine composition: Li 377 mg/L, Na 57777 mg/L, K 14448 mg/L, Ca 26766 mg/L. Experimental conditions: flow rate 30 BV/hr, pH 5 Source: SRI International Sorbent Regeneration Tests Regeneration tests were performed on sorbent beads that had been loaded with lithium during an adsorption test. Before regeneration, the loaded sorbent was washed with water to remove the brine surrounding the sorbent beads. The regeneration temperature was controlled by circulating water from a constant temperature bath, through the column jacket. Regeneration tests were performed as a function of column temperature and applied CO2 pressure. The regeneration solution was collected in fractions and analyzed by ion chromatography for lithium and other metals. The loading of lithium in the sorbent was fixed by saturating the sorbent using a brine containing 406 mg/L of lithium, 16,218 mg/L of sodium, and 10,705 mg/L of potassium. The flow rate of regeneration solution was fixed, and the regeneration temperature and the CO2 pressure were varied. 15PDF Image | Selective Recovery of Lithium from Geothermal Brines
PDF Search Title:
Selective Recovery of Lithium from Geothermal BrinesOriginal File Name Searched:
CEC-500-2020-020.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)