The object of this patent is aimed at the production of OXIDIZING GAS CONTAINING 39% O.sub.2 AND 61% N.sub.2 BY WEIGHT, WITH N.sub.2 HAVING A PURITY LEVEL BETWEEN 95% AND 98%, whereby the water that will be deaerated is previously aerated at temperatures ranging from ambient down to 0 C., under pressures between 20.6 and 31 atm, only enough to dissolve all the volume of O.sub.2 in the air that is compressed upon it, along with the portion of N.sub.2 of the air, whose capture cannot be dissociated from the process. Afterwards, part of the air is recovered at the top of the deaeration tank, in the form of oxidizing gas, containing 39% O.sub.2 and 61% N.sub.2 by weight, with N.sub.2, which was originally part of the compressed air and was not solubilized in the water, being collected at the top of the aeration or gasification tank showing a purity level between 95% and 98%.

2ndunlike the State of the Art, which mandatorily requires high water temperature, up to its boiling point, the process degasification, object of the present invention, may be conducted by the preferred embodiment of its pieces of equipment simply by reducing degasification pressure in the degasification tank down to a little bit less than the atmospheric pressure to obtain the same oxidizing gas, and, following degasification, the process water keeps about 20 mg of air, per liter of water, dissolved in itself and, therefore, cannot be used as totally deaerated water.

3degasification may also be carried out by equipment as formed in the first construction variant of the object of this patent by reducing pressure and, at the same time, increasing the temperature, or sending it, in both embodiments, to the equipment, pre-existing in certain industries, which is used to fully deaerate water and, in these cases, produce the oxidizing gas and fully deaerated water.

A hybrid post-combustion carbon dioxide capture system for capturing carbon dioxide from a flue gas includes a compressor adapted to produce a compressed flue gas stream, a membrane-based carbon dioxide separation unit configured to receive a first portion of the compressed flue gas stream from the compressor, and an aqueous-based carbon dioxide capture unit configured to receive a second portion of the compressed flue gas stream from the compressor whereby the compressed flue gas stream is processed in parallel by the membrane-based carbon dioxide separation unit and the aqueous-based carbon dioxide capture unit.

The present disclosure provides a process for controlling syngas composition from an internal combustion engine-based syngas generator. While air is typically used as an oxidant, with nitrogen (N.sub.2) as a diluent, this results in expensive downstream compression, and low feedstock conversion efficiencies. This disclosure provides CO.sub.2 as a diluent to reduce N.sub.2 concentration in the syngas. In some embodiments, the CO.sub.2 diluent may be from either a biogas processing coupled with methanol, DME, and/or hydrocarbon production; or natural gas processing coupled with Fischer-Tropsch (FT) synthesis and/or other hydrocarbon synthesis.

Processes and apparatuses for treating a sour synthesis gas are provided. The process comprises passing the sour synthesis gas stream to an acid gas removal unit to provide a treated synthesis gas stream and a CO.sub.2 rich stream. At least a portion of the CO.sub.2 rich stream is passed to a thermal oxidizer unit to provide a treated CO.sub.2 gas stream. At least a portion of the treated synthesis gas stream is passed to a pressure swing adsorption unit to obtain a purified hydrogen stream and a tail gas stream. At least a portion of the tail gas stream is passed to the thermal oxidizer unit.

Process for the combined production of a mixture of hydrogen and nitrogen, and of carbon monoxide by cryogenic distillation and cryogenic scrubbing, wherein a methane-rich liquid is introduced at a first intermediate level of a scrubbing column as first scrubbing liquid and at least one nitrogen-rich liquid is introduced at a level higher than the first level of the scrubbing column as second scrubbing liquid and a mixture of hydrogen and nitrogen is drawn off as overhead gas from the scrubbing column.

A purification apparatus and purification method of a non-metallic semiconductor material relate to the field of preparation of high-purity materials, and are especially applicable to preparation of high-purity non-metal materials, in particular to an apparatus and method for purifying a non-metallic semiconductor material by means of a metal melt. The apparatus includes a furnace body, a pressure balance valve, a crucible disposed in the middle of the lower part of the furnace body, a heating and supporting structure for the crucible, a liftable injection mechanism disposed right above the crucible, and a liftable and rotatable recovery mechanism disposed next to the liftable injection mechanism. The method is completed based on the purification apparatus, and includes: injecting the gasified non-metal material into the metal melt under a high pressure environment; reducing the ambient pressure, and collecting the bubbles volatilized from the metal melt to obtain the purified non-metal material. The technical solution proposed in the present invention can be used to effectively remove impurities in the non-metal material, especially remove elements of similar properties. The apparatus is highly integrated and easy to control, and the method is simple.

The present invention relates to a hydrogen sulfide purification method including removing a lithium raw material from a mixed gas which is generated in a process of producing lithium sulfide by a reaction of hydrogen sulfide and the lithium raw material and which includes unreacted hydrogen sulfide and the lithium raw material.

Recovering helium from a gaseous stream includes contacting an acid gas removal membrane with a gaseous stream to yield a permeate stream and a residual stream, removing a majority of the acid gas from the residual stream to yield a first acid gas stream and a helium depleted clean gas stream, removing a majority of the acid gas from the permeate stream to yield a second acid gas stream and a helium rich stream, and removing helium from the helium rich stream to yield a helium product stream and a helium depleted stream. A helium removal system for removing helium from a gaseous stream including hydrocarbon gas, acid gas, and helium includes a first processing zone including a first acid gas removal unit, a second processing zone including a second acid gas removal unit, a third processing zone, and a helium purification unit.

Processes and apparatuses for treating a sour synthesis gas are provided. The process comprises passing the sour synthesis gas stream to an acid gas removal unit to provide a treated synthesis gas stream and a CO.sub.2 rich stream. At least a portion of the CO.sub.2 rich stream is passed to a thermal oxidizer unit to provide a treated CO.sub.2 gas stream. At least a portion of the treated synthesis gas stream is passed to a pressure swing adsorption unit to obtain a purified hydrogen stream and a tail gas stream. At least a portion of the tail gas stream is passed to the thermal oxidizer unit.

The present provides a helium gas separation and recovery process involving cryogenic fractionation process, which comprises cooling a dehydrated high-pressure gas stream while maintain velocity and pressure of the stream; reducing pressure of the dehydrated high-pressure gas stream via a Joule-Thompson's process to obtain a partially liquefied gas stream; and iii) subjecting the partially liquefied gas stream to at least one gas-liquid separation process to obtain at least one liquid stream and a gaseous stream comprising helium, and a residual amount of the gaseous components; recycling the liquid stream obtained in step iii) for use as cooling refrigerant to cool the dehydrated high-pressure gas stream; and purifying the unrefined helium gas stream using pressure swing adsorption (PSA) and/or membrane separation process to obtain a helium product stream having a purity of 98.0 mole % or more.