The present invention provides ammonia purification means to remove impurities such as oil with a negative effect on vapor deposition from inexpensive commercially available industrial crude ammonia and from crude ammonia recovered from the gallium nitride compound semiconductor process and to continuously supply the purified ammonia to the gallium nitride compound semiconductor process. The oil removing device removing oil from crude ammonia containing oil as impurities includes an oil filter cylinder accommodating a filtration element cylindrically formed from a filtration membrane processed into a shape of pleat, honeycomb, or space structure; and an oil adsorption cylinder filled with activated carbon. The ammonia purification apparatus is provided with the oil removing device; a catalyst cylinder filled with a catalyst containing nickel as an active component; and an adsorption cylinder filled with synthetic zeolite.

The invention relates to a facility for purification by adsorption of gaseous flow comprising at least one impurity which has a corrosive effect on carbons steel, comprising a radial adsorber comprising a housing with an outer envelope made of carbon steel; a vertical perforated inner grating consisting of a corrosion-resistant material, a vertical perforated outer grating, an adsorbent which is held vertically by the outer grating and the inner grating, and allows at least partial blockage of the corrosive impurity, and a means for allowing a centrifugal circulation of the gaseous flow.

Fuel tank inerting prefilter assemblies, fuel tank inerting prefilter devices, and methods for treating fluids, particularly process fluids used in fuel inerting tank systems, are disclosed.

The present invention relates to a filter element for filtering particulate materials in a fluid, comprising a first filtration zone comprising first-size particles and a second filtration zone comprising second-size particles, as well as a transition zone comprising a mixture of first-size particles and second-size particles and interconnecting the first filtration zone and the second filtration zone. Preferably, the filter element is a carbon block formed by sintering two types of activated carbon particles having different sizes and ultra-high-molecular-weight polyethylene around them. The filter element of the present invention has both higher filtration capacity and higher absorption capacity. In addition, the present invention further relates to a method for manufacturing the filter element of the present invention.

Wastewater treatment and conveyance; and other chemical processes result in emission of a wide variety of odorous compounds. Contaminated exhaust air is typically a byproduct emitted from sludge in tanks and wells that are part of a wastewater treatment, conveyance, or chemical process. Said contaminated air has to be treated to capture or reduce odorous compounds or pollutants below human smell recognition threshold levels before the exhaust is discharged to the atmosphere. The present invention is a carbon scrubber used to treat and filter contaminated exhaust air produced in wastewater treatment and conveyance; and other chemical processes.

In various aspects, apparatuses, systems, and methods are provided for performing two stage separation of CO2 from a gaseous stream. The first stage adsorbent can be comprised of a plurality of cylindrical or substantially cylindrical rings. The first stage adsorbent can be comprised of a metal organic framework. The second stage adsorbent can be subject to a displacement desorption process. The second stage adsorbent can be comprised of a support and a metal compound selected from the group consisting of alkali or alkaline earth. The first and second stage adsorbent can be arranged concentrically for space and efficiency considerations.

A reactor includes: a shell with first and second ends, an fluid inlet at the first end for receiving a process fluid, and an outlet at the second end for discharging a reacted process fluid, and a plurality of elongate containment units within the shell for containing a particulate catalyst or sorbent, each containment unit including two perforate members defining a space in which the particulate catalyst or sorbent may be placed, the perforate members mounted between two fluid-impermeable end members, wherein one end member extends across the containment unit to provide a closed end and the other end member closes the space thereby providing an open end through which a process fluid may enter or exit the containment unit, and a header assembly connected to the open ends of the containment units and either the fluid inlet or fluid outlet. A process using the reactor is also described.

A method for separating off carbon dioxide from a gas mixture, in particular from breathing air, with a life-sustaining device, wherein in a first method step the gas mixture is fed to an adsorption and/or absorption unit under at least one first pressure, and in a second method step a gas mixture is conveyed out of the adsorption and/or absorption unit under at least one second pressure that is higher than the first pressure.

A method of forming a gas treatment element for use in a gas treatment apparatus, such as a desiccant dryer, is disclosed. The element is formed by casting a sheet material by phase inversion of a dope mixture including a solvent, an adsorbent material such as a desiccant and a polymer binder. Layers of the sheet material are located adjacent one another and this is most readily achieved by rolling the sheet material to form the gas treatment element.

A filter body is provided with a filter medium that has filter layers arranged one over the other, wherein each filter layer is provided with at least one active material. The at least one active material is the same in all of the filter layers. The filter layers are to be flowed through serially in a through-flow direction of the filter body. Sensor devices are provided, wherein each sensor device is arranged between two of the filter layers neighboring each other, respectively, so that the sensor devices, in the through-flow direction of the filter body, are arranged one after another in order to determine a sorption capacity of the at least one active material of each filter layer over a service life of the filter body.