Nuvera Fuel Cells, Inc.

Kyle Vanzandt

Zhijiang Li

Scott C Blanchet

Bryan Gordon

A pressure swing adsorption (PSA) system for purifying a feed gas is provided. The PSA system may have a first adsorber bed and a second adsorber bed, each having a feed port, a product port, and adsorbent material designed to adsorb one or more impurities from the feed gas to produce a product gas. The PSA system may also have a first valve configured to direct flows of the feed gas and the product gas through a network of piping. The PSA system may further have a first orifice configured to regulate a flow rate of gas between the first adsorber bed and the second adsorber bed during the pressure equalization step and a second orifice configured to regulate a flow rate of gas between the first adsorber bed and the second adsorber bed during the purge step.

Regulating flow of pressure swing adsorbers

In accordance with one embodiment, a method of drying a hydrogen gas mixture is disclosed. The method may include determining a mass flow rate of water {dot over (m)}in a hydrogen gas mixture stream and an adsorbent capacity of one or more adsorbent beds; determining a first period of time based on the determined mass flow rate of water {dot over (m)}in the hydrogen gas mixture stream and the adsorbent capacity; directing the hydrogen gas mixture stream through a first adsorbent bed of the one or more adsorbent beds for the first period of time; adsorbing a quantity of water from the hydrogen gas mixture stream into the first adsorbent bed; and regenerating the first adsorbent bed.

Methods of operating pressure swing adsorption purifiers with electrochemical hydrogen compressors

A system for compressing and drying hydrogen is provided. The system may have a humidifier configured to receive and humidify a concentrated hydrogen stream and produce a first humidified hydrogen stream. The system may also have a compressor configured to receive and compress the first humidified hydrogen stream, and produce a pressurized humidified hydrogen stream. The system may further have a dryer including a first bed configured to in production mode receive the pressurized humidified hydrogen stream, adsorb at least a portion of the humidity, and produce a product hydrogen stream. The first bed may further be configured to in regeneration mode receive a portion of the concentrated hydrogen stream to regenerate the first bed, and produce a second humidified hydrogen stream.

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Allston, MA, United States of America

Kyle Vanzandt