Abstract:
The present disclosure describes an electrochemical cell that has an electric power source, an anode, a gas diffusion cathode and a gas space in communication with the gas diffusion cathode. The gas diffusion cathode includes an ion exchange coating that faces the anode. The ion exchange coating is a polymer that also protects the gas diffusion cathode. A feed solution flows between the ion exchange coating and the anode. The gas space contains at least some oxygen gas that diffuses into the gas diffusion cathode. Within the gas diffusion cathode oxygen reacts to produce hydroxide radicals. The anion exchange coating transports the hydroxide radicals from the gas diffusion cathode to electrochemically produce oxidant-based biocides.
Abstract:
A method for purifying an aqueous stream comprising silica of a first concentration is provided. The method comprises: treating the aqueous stream with an electrocoagulation (EC) process to obtain a purified stream comprising silica of a second concentration lower than the first concentration. Optionally the aqueous stream may be produced water or have a temperature in a range of from about 60 °C to less than about 100 °C. At the same time, a system for enhanced oil recovery, a process for recycling polymer flood produced water and an oil recovery process are also provided.
Abstract:
A method comprises: positioning a first capacitive electrode and a first non- capacitive electrode in a first aqueous solution comprising at least one of sodium chloride, potassium chloride, sodium bromide and potassium bromide; applying a first electrical current on the first capacitive electrode and the first non-capacitive electrode to electrolyse the first aqueous solution to generate at least one of chlorine and bromine, while the first capacitive electrode acts as cathode and the first non- capacitive electrode acts as anode; applying a second electrical current on the first capacitive electrode and the first non-capacitive electrode to electrolyse the first aqueous solution to generate hydrogen, while the first capacitive electrode acts as anode and the first non-capacitive electrode acts as cathode; and switching polarities of the first capacitive electrode and the first non-capacitive electrode before the first capacitive electrode is fully occupied.
Abstract:
A galvanic cell utilizing a gas scrubber is provided. The galvanic cell may include a galvanic cell unit and a gas scrubber comprising an active material layer, a resistance coil in contact with the active material layer, a first shutter positioned between the active material layer and ambient air, a second shutter may be positioned between the galvanic cell unit and the active material layer.
Abstract:
A galvanic cell structure is provided including an outer cylinder (1) featuring air inlets (7), a cathode (3), an anode (9), a membrane (5) separating the cathode (3) from the anode (9), and an inner cylinder (11) featuring fluid inlets that may provide a volume for storing and/or transferring fluid for use in the galvanic cell.
Abstract:
An acoustic treatment assembly (50) for a turbine system includes a region of the turbine system having a flow path configured to allow a fluid flow therethrough. Also included is at least one sound attenuation structure (52) disposed in the flow path. The sound attenuation structure includes a substantially rigid frame (54) and a flexible membrane (56) retained by the frame.
Abstract:
A fuel cell assembly may be provided that includes a first cathodic electrode and a second cathodic electrode; an anodic electrode positioned between the first cathodic electrode and the second cathodic electrode; a first membrane positioned between the first cathodic electrode and the anodic electrode; a second membrane positioned between the second cathodic electrode and the anodic electrode; and a seal ring for sealing the fuel cell assembly, the seal ring comprising a water-refilling mechanism.
Abstract:
A third electrode frame structure (1) for use in a fuel cell or battery is provided. The third electrode frame structure (1) may include a first electrode (7) , a separator (5) positioned on an outer perimeter of the first electrode (7) , and a frame third electrode (3) coupled to the separator (5) . The separator may be positioned in a same plane between the first electrode (7) and the third frame electrode (3) .
Abstract:
A method of reducing the organic compoundsin an aqueous stream by generating an oxidant in-situ using at least one electrolytic cell. The method may comprise contacting at least a portion of the aqueous stream with the electrolytic cell. The electrolytic cell may have at least two electrodes, wherein at least one electrode is a metal electrode and, a power source for powering the at least two electrodes. A water treatment system for generating an oxidant in-situ comprising at least one electrolytic cell. The electrolytic cell may have at least two electrodes, wherein at least one electrode is a metal electrode, anda power source for powering the at least two electrodes. A method of improving the rejection rate of a reverse osmosis membrane using an oxidant generated in-situ. The method may comprise contacting at least a portion of the aqueous stream with the electrolytic cell thereby creating an oxidized aqueous stream. At least a portion of the oxidized aqueous stream may be fed through a reverse osmosis membrane. The electrolytic cell may comprise at least two electrodes, wherein at least one electrode is a metal electrode, anda power source for powering the at least two electrodes.
Abstract:
A method for recovering tellurium from a module comprising cadmium telluride, comprises: contacting the module comprising cadmium telluride with an electrolyte solution at a pH greater than about 9; contacting a counter electrode with the electrolyte solution; and applying a voltage differential between the module and the counter electrode; whereby tellurium migrates from the module and is deposited on the counter electrode.