Abstract: A gas production system that can supply liquefied gas obtained by rectifying source gas as product gas continuously with high heat efficiency without using a machine that has a risk of contamination like a pump. A gas production system includes a single pressure device having a single pressurized container to which liquefied gas extracted from a rectification unit is supplied, a pressure line for extracting and vaporizing a part of the liquefied gas in the pressurized container and returning the part of the liquefied gas to the pressurized container, and a second heat exchange unit that is disposed in the pressure line, and a liquefied gas storage unit that stores liquefied gas which is led out from the pressurized container.

Abstract: A furnace for performing an endothermic process, comprising tubes containing catalyst for converting gaseous feed, wherein tubes are positioned inside the furnace in rows parallel to refractory walls along X axis, wherein burners are mounted either to the furnace floor or to the furnace ceiling, inner burners being mounted in rows between the rows of tubes and outer burners being mounted in rows between tubes rows and the wall along X axis, and close to said wall along X axis, wherein the outer burners are positioned such that the distance b2w between the outer burner and the wall along X axis is smaller than or equal to equivalent burner nozzle diameter øb of said outer burner (b2w /øb?1).

Abstract: Gas supply device, comprising a frame equipped with a base and accommodating a plurality of pressurised fluid cylinders connected to a fluidic circuit comprising a first connection end connected to the cylinders and a second end comprising at least one fluidic connection intended to be connected removably to an extraction or filling element for the cylinders, the frame comprising on one of its faces at least one opening giving access to at least one connection of the circuit, the frame also comprising at least one attachment element provided to cooperate with a lifting device.

Abstract: Synthesis of tungsten pentahalide compositions having low impurity profiles are disclosed. The specific impurity profile permits deposition of high purity tungsten-containing films using vapor deposition processes or other semiconductor manufacturing processes without introduction of performance-impacting contaminants.

Abstract: The invention relates to a process for producing hydrogen from a light hydrocarbon source, in which a synthesis gas is generated by steam methane reforming after desulfurization and optionally pre-reforming of the feedstock. The synthesis gas is enriched with hydrogen by steam conversion of carbon monoxide, and is subsequently purified in a pressure swing adsorption unit to give a pure H2 product and a residual gas mixture containing CH4, CO, H2 and CO2; in accordance with the invention, the conversion step is performed in a cooled reactor in which the heat of the conversion reaction is transferred to a fluid which feeds the burners of the reformer, or to the gas for reforming.

Abstract: Installation and method for filling tanks with pressurized gas in which fluid supplied to the buffer storage reservoir is at a relatively higher first temperature while fluid is being withdrawn from the buffer storage reservoir to fill a tank and fluid is supplied to the buffer storage reservoir at a relatively lower second temperature when fluid is not being withdrawn from the buffer storage reservoir to fill a tank.

Abstract: An apparatus and method for purifying a raw hydrogen gas stream of chloramines and chlorine is provided. The explosive chloramines compounds can be effectively captured by the carbon adsorbent without accumulating on the carbon surface. Rather, the chloramines are converted via decomposition, into non-explosive products with catalytic effect of the carbon material. Chlorine reacts with impregnated reducing agent on the carbon surface to form the solid products, which can be adsorbed on the carbon surface. The purified hydrogen gas contains little to no trace of chloramines and chlorine impurities, thereby making the hydrogen gas suitable for liquid hydrogen production.

Abstract: The invention relates to a flowmeter for liquid/gas two-phase cryogenic fluids, including: a separator of the liquid/gas phases, preferably made up of vessel, the cryogenic fluid being admitted into the top portion of said vessel; a liquid flow sensor, located on a liquid pipe in fluid communication with the bottom portion of the vessel, the vessel being placed in the top position in the space relative to the liquid flow sensor; a gas pipe, in fluid communication with the upper portion of the vessel, provided with a flow sensor of the gas phase circulating in said gas pipe; a three-way valve capable of recovering, in two of the channels thereof (A/B), the downstream end of said gas pipe and the downstream end of said liquid pipe; and a device for measuring the level of liquid in the vessel, preferably comprising two level sensors: a bottom level sensor and a top level sensor.

Abstract: A method for improving thermal efficiency of steam production in a steam reforming based syngas plant is provided. In one embodiment, the method can include the steps of: preheating a hydrocarbon feed stream in a first heat exchanger from a first temperature to a second temperature; preheating the hydrocarbon feed stream in a second heat exchanger to a third temperature, wherein the third temperature is greater than the second temperature; introducing the hydrocarbon feed stream in the presence of steam to a steam methane reformer under conditions effective for producing a product stream comprising hydrogen, carbon oxides, and water vapor; and exchanging heat between the product stream and a boiler feed water stream in a third heat exchanger, wherein prior to exchanging heat with the product stream, the boiler feed water stream is used to provide the preheating to the hydrocarbon feed stream in the first heat exchanger.

Abstract: Installation and method for storing and dispensing liquefied hydrogen involving a source of gaseous hydrogen, a liquefier, and two storage reservoirs for liquid hydrogen at determined respective storage pressures, wherein the liquefier includes an inlet connected to the source and an outlet connected in parallel, via a set of valves, to a respective inlet of each storage reservoir.

Abstract: An apparatus for improving thermal efficiency of steam production is provided.

Abstract: Solid or liquid N—H free, C-free, and Si-rich perhydropolysilazane compositions comprising units having the following formula [—N(SiH3)x(SiH2—)y], wherein x=0, 1, or 2 and y=0, 1, or 2 when x+y=2; and x=0, 1 or 2 and y=1, 2, or 3 when x+y=3 are disclosed. Also disclosed are synthesis methods and applications for the same.

Abstract: A composite fiber comprising sorbent particles (at 50 wt %) in a polymeric matrix that comprises a polymer or blend of polymers including at least one thermoplastic polymer, the extrudates being produced by thermal-induced phase separation or diffusion-induced phase separation from a dope suspension of the thermoplastic polymer, an optional solvent and the sorbent particles. The polymer or blend of polymers is able to withstand exposure to temperatures at or above 220° C. without experiencing significant detrimental effects upon the sorbent capacity of the sorbent particles. The fiber exhibits an elongation at break of at least 5%.

Abstract: An apparatus for the distillation of air by cryogenic distillation is provided. The apparatus can include an enclosure; a first distillation column configured to operate at a first pressure; a second distillation column configured to operate at a second pressure that is lower than the first pressure, the second distillation column being placed above the first distillation column and forming therewith a double column; a subcooling heat exchanger configured to cool at least one liquid from the first distillation column upstream of the second distillation column and configured to warm a gaseous nitrogen stream from the second distillation column; and an argon column configured to separate an argon enriched stream from the second distillation column and configured to produce an argon rich stream.

Abstract: A method for separating air by cryogenic distillation in a system of columns comprising a first column and a second column operating at a lower pressure than the first column, comprising the steps of compressing all of the feed air in a first compressor to a first output pressure of at least 1 bar greater than the pressure of the first column, sending a first portion of the air under the first output pressure to the second compressor, and compressing the air to a second output pressure, cooling and condensing at least a portion of the air under the second output pressure in a heat exchanger, withdrawal of a liquid from a column of the system of columns, pressurising the liquid and evaporating the liquid by heat exchange in the heat exchanger, and pressure reduction of a portion of the compressed air to a second output pressure, at least partially evaporating said air in the heat exchanger, optionally additional heating of said air in the heat exchanger, and sending at least a portion of this air to the second

Abstract: In a method for producing a series of at least a first and a second plate and fin heat exchanger, each having at least one fluid distribution tank capping at least some of the openings of the matrix unit and which is connected to a pipe, the tank is partitioned into several compartments using at least one partition, so as to distribute the number of openings assigned to a first fluid and to a second fluid, the partition being designed to divide the said tank into several compartments which are each connected to a pipe for the passage of the first fluid or of the second fluid and which each communicate with a number of openings that varies according to the configuration adopted by the at least one partition, for the exchanger of the series.

Abstract: In a method for producing a series of at least a first and a second plate-fin heat exchangers, several elongate fluid distribution tanks are installed on the matrix unit, each tank capping just some of the openings assigned to the first fluid and to the second fluid, each tank having its axis in the direction of stacking and each being connected to a pipe so that the number of openings assigned to the first fluid differs from the number of openings assigned to the first fluid, and for preference, the number of openings assigned to the second fluid differs from the number of openings assigned to the second fluid for the at least first and second exchangers of the series.

Abstract: A method for maximizing the value of gas streams containing carbon dioxide, carbon monoxide, and hydrogen including splitting a carbon dioxide, carbon monoxide, and hydrogen containing stream into a first fraction and a second fraction, introducing at least a portion of a scrubbed first fraction into a temperature swing adsorption unit to further remove carbon dioxide and to remove water, separating at least a portion of the scrubbed and dried first fraction to produce a carbon monoxide product stream and a hydrogen product stream, combining at least a portion of the hydrogen product stream and the second fraction to produce a methanol-synthesis gas stream, wherein at least a portion of a crude methanol stream, generated after a single pass through the methanol synthesis reactor, is withdrawn and used as a crude methanol product, and wherein the methanol-synthesis gas stream is produced without utilizing a water gas shift reaction.

Abstract: Method and installation for calcining cement raw meal in a calciner whereby fuel and a calciner oxidant having an oxygen content of at least 30% vol are introduced into the calciner so as to generate either an oxidant-lean zone or a fuel-lean zone in the calciner located between the lowermost fuel inlet level and the lowermost oxidant inlet level of the calciner, between 50% and 100% by weight of the raw meal being supplied to the calciner upstream of and/or within the oxidant-lean, respectively the fuel-lean zone.

Abstract: This invention relates to a process and an apparatus for producing a mixed feed stream for a steam reforming plant from a first feed stream containing methane and a second feed stream comprising higher hydrocarbons, olefins and diolefins. According to the invention, the required hydrogenation of the mono- and diolefins and the hydrodesulfurization of the organic sulfur compounds contained in the feed stream are carried out step by step under process conditions optimized in each case. Furthermore, the inlet temperature into the respective reaction zone is controlled such that overheating of the feedstocks is avoided, which otherwise leads to undesired coke deposits, cloggings and the accelerated deactivation of the catalysts used.