The instant disclosure discloses a workpiece container system comprising a storage assembly that comprises a seat member. The seat member has a storage portion that defines a longitudinal axis through a geometric center region thereof, provided with a workpiece receiving region that encompasses the geometric center region and configured to receive a workpiece. The seat member has a pair of flank portions arranged on opposite sides of the storage portion along the longitudinal axis, each having a thickness thinner than that of the storage portion. A diffuse inducing component is provided on the storage portion in the workpiece receiving region yet offsets the geometric center region thereof.

Embodiments relate generally to a filter (110), for example, for attachment onto a gas detector device or a gas sensor, and attempt to improve the efficiency and service life of the filter (110). Embodiments typically comprise a dustproof membrane (114) and a waterproof membrane (113). Some embodiments may also comprise a splash-proof cap (130) and/or features to reduce negative pressure on the filter (110).

The present invention provides a heat-driven adsorption vacuum dehumidification system including a vapor adsorption apparatus having a water permeable hydrophilic membrane separating the apparatus into at least a feed section and a low-pressure or vacuum section (evaporator), and providing a water vapor pressure difference to extract moisture from the air flowing through the apparatus into the evaporator, followed by adsorption in an adsorption chamber, and subsequently desorbed when acted as a desorption chamber to form water vapor which is condensed in a condenser. Adsorption and desorption chambers inter-change periodically to form a complete system cycle. Heating of chamber/compartment can be from waste heat or a renewable source in the absence of any electricity supplied externally. Related method for using a heat-driven adsorption vacuum dehumidification system to remove moisture from the air is also provided. The present invention is superior to the adsorption chiller over a wide range of operating conditions.

The invention relates to a process for recovering methane from digester biogas or landfill gas. More specifically, the invention pertains to a method for producing biomethane that removes impurities from a compressed digester biogas with staged membrane modules of at least two different types, to produce a biomethane having at least 94% CH.sub.4, below 3% of CO.sub.2, and below 4 ppm of H.sub.2S.

A device for exchange of water molecule and temperature between two fluids. The device comprises thin molecular sieve membrane sheets that allow water molecules to permeate through while blocking cross-over of the exchanging fluids. The device provides two sets of flow channels having a hydraulic diameter ranged from 0.5 to 2.0 mm for respective process and sweep fluid flows. The two sets of the channels are separated by a membrane sheet having a thickness less than 200 μm. The thin molecule sieve membrane may be prepared by forming an ultra-thin zeolite membrane layer on a porous metal-based support sheet which provides very high water permeance so that the exchange can be conducted in a compact membrane module at high throughput. The device can be used to remove water from a process stream of higher water content by use of a sweep fluid of lower water content or higher water affinity. For example, the device can be used to condition outdoor fresh air close to the temperature and humidity of indoor air by conducting humidity and heat exchange between the fresh air flow drawn from outdoors and waste air discharged indoors.

A dehumidifying element includes a dehumidification space that are formed between a pair of potting material portions and that accommodates hollow fiber membranes through which highly humid dehumidification-target air is circulated. The dehumidifying element also includes an air supply hole for supplying purging air having a humidity lower than the dehumidification-target air to the dehumidification space and an air discharge hole for discharging the purging air supplied to the dehumidification space. In the dehumidification space, a guide member is disposed so as to form a plurality of regions in a cylindrical casing as viewed in the axis-L direction, and the hollow fiber membranes are accommodated in the dehumidification space so as to be distributed into the plurality of regions.

A device for separating components of a gas mixture includes a hollow housing having a body portion at a first end, a separable end cap at a second end, and at least one side wall. The housing has an inlet port for the gas mixture, a permeate outlet port for gas mixture enriched with a first component of the mixture, and a retentate outlet port for gas mixture enriched with a second component of the mixture. An insert within the housing comprises a plurality of hollow fibres of a material which are more permeable to the first component than the second. The housing defines passageways for gas to flow between the inlet port and the permeate and retentate outlet ports. The insert is fastened to the end cap at least temporarily so that the insert is withdrawn from within the housing when the end cap is removed.

An environmental control system includes an air conditioning subsystem and a contaminant removal subsystem downstream of the environment to be conditioned. The contaminant removal subsystem includes: a first gas-liquid contactor-separator; a second gas-liquid contactor-separator; and a dehumidifier disposed either upstream of the first gas-liquid contactor-separator or downstream of the second gas-liquid contactor-separator.

Described herein is a graphene oxide and polymer based selectively permeable element that provides selective gas, and vapor resistance for dehumidification applications. The graphene oxide is cross-linked with polyvinyl alcohol, the polymer comprises an ammonium salt polymer such as poly(diallyldimethylammonium) chloride. Also described is a selectively permeable element where the graphene may be selected from reduced graphene oxide, graphene oxide, and is also functionalized or crosslinked. Also described is a selectively permeable element where there is crosslinking between the graphene and/or the polymers to provide enhanced gas resistance with water vapor permeability. A selectively permeable device is also described that incorporates the selectively permeable element and further comprises a substrate and a protective coating, encompassing the selectively permeable element. Also described are methods for making the aforementioned selectively permeable elements and related devices.

A method for drying a gas sample comprises flowing purge gas over the exterior of tubes of a perfluorosulfonic acid membrane and flowing the gas sample through interior of tubes, wherein the drying operation is conducted under deep vacuum and with the purge gas flowing at a rate that is typically less than that of the gas sample being dried.