Processes and systems for the energy efficient capture of CO.sub.2 from a flue gas stream such as produced or resulting from power plant operation, are provided. The processes and systems integrate the use of high CO.sub.2/N.sub.2 selectivity membranes and high CO.sub.2 flux membranes, to capture CO.sub.2. Useful membranes can desirably be graphene oxide-based membranes.

An oxygenator includes: a housing; a bubble-removing hollow fiber membrane layer removing a bubble; a gas-exchanging hollow fiber membrane layer exchanging a gas with blood; and a discharge port to discharge the bubble removed by the bubble-removing hollow fiber membrane layer to the outside of the housing. The oxygenator further includes a gas permeable portion that is arranged between the discharge port and an end portion of the bubble-removing hollow fiber membrane layer, is formed by a member having gas permeability, and allows passage of the bubble removed by the bubble-removing hollow fiber membrane layer without allowing passage of plasma leaking through the bubble-removing hollow fiber membrane layer. A plasma capture chamber that captures the plasma leaking through the bubble-removing hollow fiber membrane layer is formed between the end portion of the bubble-removing hollow fiber membrane layer and the gas permeable portion.

A fuel cell humidifier may completely or substantially completely prevent condensate water from entering a running fuel cell stack. The fuel cell humidifier includes a housing; a plurality of hollow fiber membranes arranged in the housing; a cap which is coupled to one end of the housing and has an air discharge port for supplying humidified air to the fuel cell stack; and a bypass tube for transferring condensate water generated from the humidified air to an interior space of the housing through which a discharge gas flows, wherein a first end of the bypass tube is disposed inside the air discharge port, and the bypass tube is in fluid communication with the interior space of the housing through a second end of the bypass tube.

A sheet-shaped hollow fiber membrane module includes a casing having a flat shape, the casing including a supply port and a discharge port, and a plurality of hollow fiber membranes accommodated inside the casing. The casing includes a plurality of the supply ports on one main surface of the casing and a plurality of the discharge ports on the other main surface of the casing, at least one of the plurality of the supply ports is closable, and at least one of the plurality of the discharge ports is closable. Each of the plurality of hollow fiber membranes includes a first opening at one end of the hollow fiber membrane and a second opening at the other end of the hollow fiber membrane, and the first opening and the second opening communicate with an outside of the casing and do not communicate with an inside of the casing.

Provided herein are tubular membrane filter elements, tangential flow filtration systems comprising such filter elements and methods of using such filter elements and filtration systems.

The present invention provides a highly-permeable dense hollow fiber membrane (HFM) for blood oxygenation. A membrane material plays a key role in an oxygenator, which determines the oxygenation efficiency, service life and safety of the oxygenator. The HFM according to the present invention features high permeability. When blood rich in carbon dioxide flows through the oxygenator, the carbon dioxide and oxygen in the blood can be rapidly exchanged, so that the blood can be rapidly updated, and the size of the oxygenator and the blood perfusion volume can be reduced. In addition, the membrane surface of the present invention is hydrophobic and dense, and blood does not directly contact with gas or permeate into a gas pipeline, thus avoiding the problems of protein leakage, permeability reduction and the like. The oxygenator prepared by using the HFM of the present invention can be repeatedly used for a long time.

A system (5) for regeneration of acidic gas solvent comprises a regeneration cell having a solvent chamber (100) arranged to receive a solvent flow and an internal chamber (92) arranged to receive a steam flow (110). The regeneration cell also includes a gas permeable membrane (95) separating the solvent chamber (100) and internal chamber (92). The regeneration cell is arranged to vent acidic gas stripped from the solvent by the steam. A method for regenerating acidic gas solvent is also provided.

An extracorporeal blood treatment device comprises a single housing defining an internal blood flow cavity. The housing accommodates an oxygenator, a heat exchanger and an additional mass transfer assembly, each having an array of fluid conduits. The arrays are co-located within the internal blood flow cavity such that blood flowing through the internal blood flow cavity flows substantially homogeneously around all the conduits. The arrays are arranged relative to one another within the internal blood flow cavity such that they together define a continuous blood flow path through the internal blood flow cavity along which blood can flow. The continuous blood flow path has a blood entry surface at one end and a blood exit surface at the opposite end. The overall blood flow direction from the blood entry surface along the blood flow path to the blood exit surface follows substantially a straight line.

An apparatus for removing water vapor from a feed gas is provided that comprises a membrane housing, a membrane that divides a first pressure side and a second pressure side of the membrane housing, a feed gas inlet and outlet on the first pressure side, a sweep gas inlet and outlet on the second pressure side, a sweep gas flow regulator, and a pump. In some embodiments the feed gas can be at ambient pressure and a pressure drop across the membrane can be less than about 1 atm.

A humidifier comprises hollow shell and humidifier core. The humidifier core includes a transfer sheet, a plurality of first channels, and a plurality of second channels. The transfer sheet comprises a permeable material having a plurality of sections and a plurality of layers of spacing materials. The plurality of first channels are configured to allow air flow in a first direction and to prevent airflow in a second direction that is different from the first direction. The plurality of second channels are configured to allow air flow in the second direction and to prevent airflow in the first direction. The humidifier comprises a stack of alternating first channels and second channels, and the first channels are configured to transfer liquid from air flowing in at least one of the first channels to air flowing in at least one of the second channels. The humidifier is suitable for use in fuel cell stack.