Medical University of South Carolina

Westinghouse Savannah River Company

Charles E Holland

James A Ritter

Armin D Ebner

John W Weidner

Ragaiy Zidan

Tao Wang

Jun Wang

The current disclosure provides systems and methods for multiple beds undergoing a feed step at the same time with the same feed flow rate and multiple beds undergoing a light reflux step at the same time with the same light reflux flow rate to process a gas stream in a multi-bed, multi-unit vacuum swing adsorption (VSA) process using reasonably sized beds.

Extremely large pressure swing adsorption processes for flue gas treatment

Methods and systems for capture of COfrom a hydrated gaseous stream are described. Systems can be utilized for direct air capture of COand incorporate a low energy temperature-vacuum swing adsorption (TVSA) process. A TVSA process can include a multi-step COcapture bed regeneration process that includes depressurization of the bed, heating of the bed, venting and purging of the bed, and cooling of the bed. Multiple beds can be cycled between COcapture and regeneration, during which captured COis recovered. Off-gas from a COcapture bed can be used in regenerating a parallel bed for increased efficiency.

Temperature-vacuum swing adsorption process for capture of CO2

In one embodiment of the present disclosure, a process for electrochemical hydrogen production is provided. The process includes providing an electrochemical cell with an anode side including an anode, a cathode side including a cathode, and a membrane separating the anode side from the cathode side. The process further includes feeding molecules of at least one gaseous reactant to the anode, oxidizing one or more molecules of the gaseous reactant at the anode to produce a gas product and protons, passing the protons through the membrane to the cathode, and reducing the protons at the cathode to form hydrogen gas.

Production of low temperature electrolytic hydrogen

In accordance with the present disclosure, a process for synthesis of a complex hydride material for hydrogen storage is provided. The process includes mixing a borohydride with at least one additive agent and at least one catalyst and heating the mixture at a temperature of less than about 600&#xb0; C. and a pressure of Hgas to form a complex hydride material. The complex hydride material comprises MAlBH, wherein M is an alkali metal or group IIA metal, Al is the element aluminum, x is any number from 0 to 1, B is the element boron, y is a number from 0 to 13, and z is a number from 4 to 57 with the additive agent and catalyst still being present. The complex hydride material is capable of cyclic dehydrogenation and rehydrogenation and has a hydrogen capacity of at least about 4 weight percent.

Reversible hydrogen storage materials

A hydrogen storage material having improved hydrogen absorbtion and desorption kinetics is provided by adding graphite to a complex hydride such as a metal-doped alanate, i.e., NaAlH. The incorporation of graphite into the complex hydride significantly enhances the rate of hydrogen absorbtion and desorption and lowers the desorption temperature needed to release stored hydrogen.

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Cayce, SC, United States of America

Charles E Holland