L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

American Air Liquide, Inc.

Air Liquide Industrial U.S. LP

Yudong Chen

Christian Monereau

Trapti Chaubey

Edgar S Sanders, Jr

Pascal Tessier

Glenn Fair

Guillaume Rodrigues

Robert A Gagliano

Richard Pawulski

Sylvain Houle

Brian Fillion

Graeme William Norval

Edgar S Sanders

An apparatus and method for purifying a raw hydrogen gas stream of chloramines and chlorine is provided. The explosive chloramines compounds can be effectively captured by the carbon adsorbent without accumulating on the carbon surface. Rather, the chloramines are converted via decomposition, into non-explosive products with catalytic effect of the carbon material. Chlorine reacts with impregnated reducing agent on the carbon surface to form the solid products, which can be adsorbed on the carbon surface. The purified hydrogen gas contains little to no trace of chloramines and chlorine impurities, thereby making the hydrogen gas suitable for liquid hydrogen production.

Purification of hydrogen

A Temperature Swing Adsorption method for separating a first component, comprising a more adsorbable component, from a feed stream comprising more than 50 mol % of a second component, comprising a less adsorbable component, is provided. The method includes providing an adsorbent structure suitable for adsorbing the first component, the structure being of the parallel passage contactor type, and cyclically implementing the following steps. Passing the feed stream through the adsorbent structure thus adsorbing the first component and producing a stream depleted in the first component and enriched in the second component. Heating the adsorbent structure to desorb the adsorbed first component by means of circulating a heating stream enriched in the first component at a temperature suitable for regeneration. And cooling the structure by means of passing through it more than 50% of the stream enriched in the second component produced in the step a).

RTSA method using adsorbent structure for CO2 capture from low pressure and low concentration sources

A structured adsorbent sheet, is provided including a nano-adsorbent powder, and a binder material, wherein the nano-adsorbent powder is combined with the binder material to form an adsorbent material, and a porous electrical heating substrate, wherein the adsorbent material is applied to the porous electrical heating substrate thereby forming a structured adsorbent sheet. A structured adsorbent module is provided, including a plurality of stacked structured adsorbent sheets, configured to produce a plurality of fluid passages, wherein the plurality of fluid passages have a cross-sectional shape in the direction of a fluid stream. The structured adsorbent module may have a cross-sectional shape that is trapezoidal, rectangle, square, triangular or sinusoidal. A structured adsorbent bed is provided, including a plurality of modules, stacking the modules, thereby providing a plurality of process fluid passages, and a process fluid inlet and a process fluid outlet, in fluid communication with the plurality of process fluid.

Method of using a structured adsorbent bed for capture of CO2 from low pressure and low pressure concentration sources

A concentrated carbon dioxide stream is produced during a hydrogen pressure swing adsorption unit cycle by fractionating the carbon dioxide removed from the adsorbent in the adsorption beds during the regeneration of the adsorption beds. Thereby providing a cost efficient process for producing merchant carbon dioxide.

Process for the recovery of a concentrated carbon dioxide stream

The present invention provides for various processes for recovering high purity gaseous hydrogen and high purity gaseous carbon dioxide from the gas stream produced using steam hydrocarbon reforming, especially steam methane reforming, utilizing a Hpressure swing adsorption unit in combination with either a COpressure swing adsorption unit in combination with a membrane separation unit or a COpressure vacuum swing adsorption unit in combination with a membrane separation unit. The present invention further relates to a process for optimizing the recovery of carbon dioxide from waste gas streams produced during the hydrogen purification step of a steam hydrocarbon reforming/water gas shift reactor/Hpressure swing adsorption unit utilizing either a COpressure swing adsorption unit in combination with a membrane separation unit or a COpressure vacuum swing adsorption unit in combination with a membrane separation unit. The present invention even further relates to the apparatus necessary to carry out the various processes of the present invention.

Processes for the recovery of high purity hydrogen and high purity carbon dioxide

The present invention relates to various processes for recovering high purity gaseous hydrogen and high purity gaseous carbon dioxide from the gas stream produced using steam hydrocarbon reforming, especially steam methane reforming, utilizing a Hpressure swing adsorption unit followed by either a COvacuum swing adsorption unit or a COvacuum swing adsorption unit in combination with an additional COpressure swing adsorption unit. By using an uncoupled HPSA and COVSA unit it is possible to produce high purity Hand high purity CO. The present invention further relates to a process for optimizing the recovery of COfrom waste gas streams produced during the hydrogen purification step of a steam hydrocarbon reforming/Hpressure swing adsorption unit utilizing either a COvacuum swing adsorption unit or a COvacuum swing adsorption unit in combination with a COpressure swing adsorption unit. The present invention even further relates to the apparatus necessary to carry out the various processes of the present invention.

The present invention provides a process for decreasing or eliminating unwanted hydrocarbon and oxygenate products caused by FTS reactions in a syngas treatment unit by utilizing heat exchangers and optionally associated pipes that are substantially fabricated of a metal material selected from the group consisting of iron, nickel, cobalt, carbon steel or stainless steel and having deposited on the metal surfaces that will come in contact with the coldbox overhead gas stream an inert coating selected from the group consisting of silicon based materials, zinc based materials, tin based materials, chromium based materials, polymers, ceramics and mixtures thereof for heating up gas streams having a mixture of hydrogen and carbon monoxide and obtained from a front end purification unit/cold box unit.

Process for decreasing or eliminating unwanted hydrocarbon and oxygenate products caused by Fisher Tropsch Synthesis reactions in a syngas treatment unit

The present invention provides a process for decreasing or eliminating unwanted hydrocarbon and oxygenate products caused by FTS reactions in a syngas treatment unit by utilizing heat exchangers and optionally associated pipes that are substantially fabricated of a material selected from the group consisting of chromium containing alloys and carbon steel for heating up gas streams having a carbon monoxide partial pressure greater than one bar obtained from a front end purification unit/cold box unit.

Process for decreasing or eliminating unwanted hydrocarbon and oxygenate products caused by Fisher Tropsch synthesis reactions in a syngas treatment unit

The present invention provides a process for decreasing or eliminating unwanted hydrocarbon and oxygenate products caused by FTS reactions in a syngas treatment unit by utilizing heat exchangers and optionally associated pipes that are substantially fabricated of a material selected from the group consisting of chromium containing alloys and carbon steel for heating up gas streams having a carbon monoxide partial pressure of less than or equal to one bar and obtained from a front end purification unit/cold box unit.

A system and method of purifying gaseous carbon dioxide from a gaseous mixture obtained at low pressure from a flue gas by passing the gaseous mixture through a vacuum swing adsorption unit and then a gas purification unit to produce carbon dioxide having a purity of approximately 97% by volume or more.

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Garnet Valley, PA, United States of America

Yudong Chen