Abstract: Refrigeration device intended to extract heat from at least one member by heat exchange with a working fluid circulating in the working circuit comprising in series: a fluid compression mechanism a fluid cooling mechanism, preferably isobaric or substantially isobaric, a fluid expansion mechanism, and a fluid heating mechanism, in which device the compression mechanism is of the centrifugal compression type and consists of two compression stages arranged in series in the circuit, the device comprising two respective electric drive motors driving the two compression stages, the expansion mechanism consisting of a turbine coupled to the motor of one of the compression stages, the turbine of the expansion mechanism being coupled to the drive motor of the first compression stage.

Abstract: Natural gas liquefaction process in combination with a synthesis gas production process, where the steam derived from the synthesis gas production process is used as a heating source for the implementation of the pre-treatment step for eliminating the impurities liable to freeze during the natural gas liquefaction process.

Abstract: A valve for pressurized fluid including a body housing a fluid circuit having an upstream end configured to be placed in communication with a reserve of pressurized fluid and a downstream end configured to be placed in communication with a user of fluid, the circuit including a collection of valve shutter(s) including at least one shutoff valve shutter allowing the circuit to be closed or opened, the valve including a member for manually controlling the collection of valve shutter(s).

Abstract: A facility and method for membrane permeation treatment of a feed gas flow containing at least methane and carbon dioxide that includes a compressor, a pressure measurement device, at least one valve, and first, second, third, and fourth membrane separation units for separation of CO2 from CH4 to permeates enriched in CO2 and retentates enriched in CH4, respectively. The at least one valve adjusts the number of membranes combined and connected to the flow of gas entering into at least one of the membrane separation units as a function of the pressure recorded by the pressure measurement device.

Abstract: A container for storing and transporting liquefied gas, having a first, internal reservoir that extends in a longitudinal direction (A) and is configured to store the liquefied gas, a second, external reservoir that is disposed around the first reservoir with a vacuum insulated space between the first and the second reservoir, a third, annular reservoir that is disposed around the first reservoir, between the first and the second reservoir, the third reservoir extending around at least a part of the first reservoir and containing a liquefied gas in order to form a heat shield for thermally insulating the first reservoir, and a device for holding the first and third reservoirs in the second reservoir.

Abstract: Si-containing film forming compositions are disclosed comprising a precursor having the formula [—NR—R4R5Si—(CH2)t—SiR2R3—]n wherein n=2 to 400; R, R2, R3, R4, and R5 are independently H, a hydrocarbon group, or an alkylamino group, and provided that at least one of R2, R3, R4, and R5 is H; and R is independently H, a hydrocarbon group, or a silyl group. Exemplary pre-cursors include, but are not limited to, [—NH—SiH2—CH2—SiH2—]n, and [—N(SiH2—CH2—SiH3)—SiH2—CH2—SiH2—]n.

Abstract: Leak testing is performed after filling a first tank with pressurized gas and before filling a second tank with the same via a filling circuit including first and second isolation valves. After the first tank is filled, the pressure of gas trapped between the two closed isolation valves is measured. If the pressure is below a predetermined threshold, the first isolation valve is opened until the pressure reaches or exceeds the predetermined threshold, at which time the first isolation valve is closed and the second isolation valve is opened so that the leak test may be performed. If the pressure is otherwise at or above the threshold, the leak test is performed.

Abstract: Certain embodiments of the invention relate to a method and facility for purifying a high-flow gas stream by absorbtion, the purification facility comprising at least one absorber having a parallelepipedal enclosure arranged horizontally and comprising: a gas stream inlet and outlet, two fixed-bed absorbent masses each having a likewise parallelepipedal shape, the surfaces of which are parallel to the surfaces of the enclosure, and a set of volumes allowing the traversing of the two absorbent masses by the gas streams, in parallel but opposite directions, the traversing occurring horizontally over the entire cross-section of each of the absorbent masses and over their entire thicknesses.

Abstract: In a compression process in a dynamic compressor having at least one first and one second compression stages, a first gas having a first molecular weight of less than 10 g/mol is compressed, at least one second fluid having a second molecular weight greater than 50 g/mol is mixed with the first gas to form a third gas to be compressed having a molecular weight greater than 10 g/mol, the third gas is sent to the first compression stage, the third gas is cooled in a first heat exchanger downstream of the first compression stage, where it is partially condensed, the partially condensed third gas is sent to a first phase separator to form a fourth gas having a lower molecular weight than the third gas and a first condensed liquid having a higher molecular weight than the third gas, the fourth gas is sent from the first phase separator to the second compression stage, the fourth gas compressed in the second compression stage is sent to cool in a second heat exchanger where it partially condenses, and the partially

Abstract: Device for supplying fluid to a user apparatus, in particular a cryogenic fuel such as hydrogen, to an engine, the device comprising a liquefied cryogenic fluid tank comprising a liquid phase and a gaseous phase, a user apparatus, a heating unit comprising a first end which is connected to the tank and a second end which is connected to the user apparatus, the drawing-off duct comprising a heater for the fluid drawn off, the device comprising a system for pressurising the tank comprising a pressurising duct comprising a first end which is connected to an upper end of the tank, a second end which is connected to a lower end of the tank, the pressurising duct comprising a fluid pumping unit and a heating unit, and being configured to draw off gaseous fluid from the tank, to heat it in the heating unit, and to re-inject this heated fluid into the low part in the liquid phase, characterised in that the pressurising duct and the drawing-off duct have a portion in common, and in that the heating unit and the heater

Abstract: The invention relates to a process for aftertreatment of gas streams in which unwanted components are present in an amount that varies irregularly in a periodic manner or over time and/or in a varying concentration, by means of an absorption or gas scrubbing process. For this purpose, during the entry of the desorption peak into the gas scrubbing apparatus, the amount of scrubbing medium is increased proceeding from a normal value during a first phase and, after the end of the desorption peak, the amount of scrubbing medium is returned back to the normal value during a second phase, wherein the laden scrubbing media are collected in different intermediate vessels during the two phases, mixed and released as a mixture to a downstream scrubbing medium regeneration apparatus.

Abstract: A process for purifying a feed gas stream containing at least 90% of CO2, at least 20% RH and at least one impurity chosen from chlorinated, sulfur-bearing, nitrated or fluorinated compounds is provided. The process includes a) subjecting the feed gas stream to catalytic oxidation producing a stream containing at least one of HCl, NOx, SOx or hydrofluoric acid; b) maintaining the temperature of the gas stream above the highest value between the dew points of water and the acid(s) contained in the gas; c) removing at least a part of the acid impurities by bringing the gas stream into contact with a corrosion-resistant heat exchanger to condense the acid compounds while regulating the temperature of the gas stream exiting below the dew point of water; and d) separating the acid condensates with a corrosion-resistant separator in such a way as to produce a CO2-enriched gas stream.

Abstract: Heat exchanger presenting a first gas flow path containing a heat-regenerative packing and a separate second gas flow path containing a heat-conductive packing and use of same for heating a gas to be heated by means of heat recovered from a hot gas in a two-phase alternating heat-recovery process.

Abstract: The invention relates to a process for removal of metal carbonyls from crude synthesis gas in a gas scrubbing process with a physical scrubbing medium. Scrubbing medium laden with hydrogen sulfide (H2S) and metal carbonyls is sent to a treatment vessel having a residence time region and a scrubbing region. Metal carbonyls are precipitated from the laden scrubbing medium as metal sulfides in the residence time region. The scrubbing region is supplied with a regenerated scrubbing medium.

Abstract: A device for storing cryogenic fluid comprising a tank extending in a longitudinal direction and suitable for containing liquefied gas in equilibrium with a gas phase, a device for pressurizing the tank, the pressurization device comprising a pressurized gas generator and a rail for injecting the pressurized gas extending in the longitudinal direction in the upper portion of the tank, the injection rail comprising a plurality of gas outlet orifices spaced apart in the longitudinal direction, characterized in that at least one of the spacing between the orifices, the diameter of the orifices and the number of the orifices is different in the longitudinal direction between a first so end through which the gas enters the rail and an opposite second end of the rail and configured to render the flow rates leaving the orifices of the rail uniform in the longitudinal direction.

Abstract: Disclosed is a packing made up of a stack of plates, having been shaped to form corrugations in the plate and assembled to form a cross-corrugated packing block for a mass and/or heat transfer application, wherein the material of the packing plates is an open-pore metal foam, and in that the specific surface area of the packing is greater than 500 m2/m3 and in that the thickness (e) of the plate is less than 2 mm before the shaping operation.

Abstract: A device for centrifugal compression of a working gas comprising a plurality of centrifugal compressors forming a plurality of compression stages and a plurality of drive motors for driving the compressors, the device comprising a gas circuit comprising a first pipe for supplying gas to be compressed into the first compressor, the gas circuit comprising a second pipe for discharging the gas compressed therein, the second pipe being connected to an inlet of a second compressor in order to carry out a second compression, the gas circuit comprising a third, cooling, pipe for transferring a fraction of the gas compressed in said compressor into said at least one first motor in order to limit heating thereof, the gas circuit comprising a fourth pipe for recovering the gas that has circulated in the first motor and a downstream end connected to an inlet of a second motor for transferring the gas into same in order to limit the heating of second motor.

Abstract: The invention relates to a tank for storing a two-phase cryogenic mixture of liquid and gas, comprising a first casing, at least one drawing pipe, a tank filling circuit, the tank comprising a sensor assembly measuring the pressure in the first casing, the tank comprising a pipe for pressurizing the internal casing, comprising an upstream end connected to the lower end of the first casing and a downstream end connected to the upper part of the first casing, the pressurization line comprising at least one regulating valve and a heater, in particular a vaporization heat exchanger. The invention is characterized in that the regulating valve is configured to automatically maintain the pressure in the first casing at a minimum value by ensuring, when the pressure in the first casing is lower than said first value, a circulation of liquid taken from the first casing in the heater and a re-injection of said heated fluid into the first casing.

Abstract: A device configured to be interposed between a lower layer and an upper layer of particles arranged inside a cylindrical shell, so as to limit or prevent the migration of particles between the layers.

Abstract: Furnace operation includes consecutive cycles of a heating step, a stopping step and a restarting step. The fuel and/or the oxidizing agent is preheated upstream of the furnace by indirect exchange with the discharged fumes through a medium passing through a chamber. A first wall separates the fumes from the medium in the chamber. The fuel and/or oxidizing agent is separated from the medium in the chamber by a second wall. During restarting, the medium's flow rate Dm is regulated to limit the heating rate of the first wall until it reaches the operational temperature at an end thereof.