Abstract:
Lithium-ion-conducting ceramic materials are disclosed having characteristics of high lithium-ion conductivity at low temperatures, good current efficiency, and stability in water and corrosive media under static and electrochemical conditions. Some general formulas for the lithium-ion-conducting materials include M I 1+x+z-δ M III x M IVa y M IVb 2-x-y M V z P 3-z O 12 and M I 1+x+4z-δ M III x M IVa y M IVb 2-x-y-z P 3 O 12 , wherein M I comprises Li, Na, or mixtures thereof; 0.05 IVa comprises Zr, Ge, Sn, or mixtures thereof; M IVb comprises Ti; and M V comprises Si, Ge, Sn, or mixtures thereof. In some cases, the lithium-ion conducting materials are formed through a process in which the materials' powdered precursors are milled after being calcined and before being sintered. The milling process may include using milling media of multiple sizes.
Abstract translation:公开了在静态和电化学条件下具有低的锂离子传导性,电流效率好以及水和腐蚀性介质中的稳定性的锂离子导电陶瓷材料。 用于锂离子传导材料的一些通式包括MI 1 + x + z-δMIIIxMIVa yMIVb 2-x-yMV zP 3-zO 12和MI 1 + x + 4z-δMIIIxMIVa yMIVb 2-xy-zP 3 O 12,其中MI包括 Li,Na或其混合物; 0.05
Abstract:
Alkali alcoholates, also called alkali alkoxides, are produced from alkali metal salt solutions and alcohol using a three-compartment electrolytic cell (10). The electrolytic cell (10) includes an anolyte compartment (22) configured with an anode (26), a buffer compartment (24), and a catholyte compartment (20) configured with a cathode (28). First and second separators (14 and 16) are positioned between the anolyte compartment (22) and the catholyte compartment (20) to define a buffer compartment (24). The first and second separators (14 and 16) are permeable to alkali ions. They may be fabricated of the same or different materials including, but not limited to, an alkali ion conducting solid electrolyte configured to selectively transport alkali ions, a porous ceramic, or a porous polymer separator material. The catholyte solution may include an alkali alcoholate and alcohol. The anolyte solution may include at least one alkali salt. The buffer compartment solution may include a soluble alkali salt and an alkali alcoholate in alcohol.
Abstract:
Methods and apparatus for synthesizing biodiesel (40) using alkali alkoxide (30) generated on-site using an electrochemical process are disclosed. The apparatus and methods are disclosed to converting alkali salts of glycerine into glycerine and thereby facilitate the separation of clean glycerine (72) from biodiesel (70). These methods are enabled by the use of alkali ion conductive ceramic membranes (16 and 42) in electrolytic cells (12 and 14).
Abstract:
Disclosed are processes of making solutions of metal alcoholates in their corresponding alcohols using an electrolytic process. In a preferred embodiment, sodium methylate in methanol is made from methanol and sodium hydroxide solution. The sodium hydroxide solution is placed in the anolyte compartment and the methanol is placed in the catholyte compartment, and the two compartments are separated by a ceramic membrane that selectively transports sodium under the influence of current. In preferred embodiments, the process is cost-effective and not environmentally harmful.
Abstract:
Methods and apparatus for separating aqueous solution of alkali aluminate into alkali hydroxide and aluminate hydroxide are disclosed. These methods are enabled by the use of alkali ion conductive membranes in electrolytic cells that are chemically stable and alkali ion selective. The alkali ion conductive membrane includes a chemically stable ionic-selective cation membrane.
Abstract:
Metal ion conducting ceramic materials are disclosed having characteristics of high ion conductivity for certain alkali and monovalent metal ions at low temperatures, high selectivity for the metal ions, good current efficiency and stability in water and corrosive media under static and electrochemical conditions. The metal ion conducting ceramic materials are fabricated to be deficient in the metal ion. One general formulation of the metal ion conducting ceramic materials is Me 1+x+y-z M III y M IV 2-y Si x P 3-x O 12-z/2 , wherein Me is Na + , Li + , K + , Rb + , Cs + , Ag + , or mixtures thereof, 2.0 ≤ x ≤ 2.4, 0.0 ≤ y ≤ 1.0, and 0.05 ≤ z ≤ 0.9, where M III is Al 3+ , Ga 3+ , Cr 3+ , Sc 3+ , Fe 3+ , In 3+ , Yb 3+ , Y 3+ , or mixtures thereof and M IV is Ti 4+ , Zr 4+ , Hf 4+ , or mixtures thereof.
Abstract:
An electrochemical method for the production of a chlorine-based oxidant product, such as sodium hypochlorite, is disclosed. The method may potentially be used to produce sodium hypochlorite from sea water or low purity un-softened or NaCl-based salt solutions. The method utilizes alkali cation-conductive ceramic membranes, such as membranes based on NaSICON-type materials, and organic polymer membranes in electrochemical cells to produce sodium hypochlorite. Generally, the electrochemical cell includes three compartments and the first compartment contains an anolyte having a basic pH.
Abstract:
Alkali alcoholates, also called alkali alkoxides, are produced from alkali metal salt solutions and alcohol using a three-compartment electrolytic cell (10). The electrolytic cell (10) includes an anolyte compartment (22) configured with an anode (26), a buffer compartment (24), and a catholyte compartment (20) configured with a cathode (28). An alkali ion conducting solid electrolyte (16) configured to selectively transport alkali ions is positioned between the anolyte compartment (22) and the buffer compartment (24). An alkali ion permeable separator (14) is positioned between the buffer compartment (24) and the catholyte compartment (20). The catholyte solution may include an alkali alcoholate and alcohol. The anolyte solution may include at least one alkali salt. The buffer compartment solution may include a soluble alkali salt and an alkali alcoholate in alcohol.
Abstract:
An apparatus (100) and method to improve protection of a pre-coated substrate(102) in a high-temperature aqueous environment. The apparatus (100 may include a pre-coated substrate (012) having a substantially porous vapor-deposited coating (104) and one or more non-porous ceramic oxide-based layers (106) applied to the pre-coated substrate (102) by a non-vapor deposition technique. The coefficient of thermal expansion corresponding to the non-porous ceramic oxide-based layer (106) may substantially match the thermal expansion coefficient of the vapor-deposited coating (104) to facilitate thermal compatibility between the two. Further, the non-porous ceramic oxide-based layer (106) may infiltrate pores of the substantially porous vapor-deposited coating (104) to provide a well-bonded hermetic seal that limits fluid access to the pre-coated substrate (102) through the substantially porous vapor-deposited coating (104).
Abstract:
An electrochemical method for the production of a chlorine-based oxidant product, such as sodium hypochlorite, is disclosed. The method may potentially be used to produce sodium hypochlorite from sea water or low purity un-softened or NaCl-based salt solutions. The method utilizes alkali cation-conductive ceramic membranes, such as membranes based on NaSICON-type materials, and organic polymer membranes in electrochemical cells to produce sodium hypochlorite. Generally, the electrochemical cell includes three compartments and the first compartment contains an anolyte having an acidic pH.