Uhde Gmbh

Krupp Uhde Gmbh

Thyssenkrupp Industrial Solutions Ag

Vincent Liu

Michael Wyschofsky

Thilo Von Trotha

Bernd Mielke

Marcus Michel

Michael Blumenfeld

A process is described for purifying synthesis gas by means of a pressure swing adsorption unit which is desorbed by a vacuum produced by a so-called ejector, which is driven by steam generated by a heat exchanger which uses the heat in the flue gas duct or in the useful-gas duct for the generation of steam. The pressure swing adsorption unit is operated advantageously in cyclic turns of adsorption under excess pressure, depressurization desorption and vacuum desorption and the gas desorbed by the ejector being cooled in a cooler so that the contained steam can be condensed and discharged or is advantageously returned to the feed gas for the synthesis gas production. The foreign gas desorbed by the pressure swing adsorption unit, which contains at least partly not yet consumed fuel gas, is recycled to the fuel gas. In an advantageous embodiment, the vacuum from the ejector is stored in an intermediate tank and applied to the pressure swing adsorption unit according to the vacuum desorption cycle. Also disclosed is a device for running this process.

Process and device for the separation of foreign gases from a reducing useful gas by steam-driven pressure swing adsorption

The invention relates to a method for extracting hydrogen from a gas containing methane, especially natural gas. Hydrocarbons contained in the gas are catalytically broken down in a reformer () by steam in order to form hydrogen, carbon monoxide and carbon dioxide. Catalytic conversion of the obtained carbon monoxide with steam occurs in a downstream conversion step in order to form carbon monoxide and water. Carbon dioxide is removed from the converted gas flow () by gas washing (), and the washed hydrogen-rich gas flow () is subsequently divided in a pressure-swing adsorption system () into a product gas flow () made of hydrogen and a waste gas flow (). The waste gas flow () is introduced with hydrogen (), which is separated from the gas flow () after gas washing, into a reformer () which is essentially a carbon-free combustible gas, and is combusted there. The invention also relates to a system for carrying out the method.

Method for extracting hydrogen from a gas that contains methane, especially natural gas, and system for carrying out said method

The invention relates to a process for the absorptive separation of NHand CHfrom a gas under high pressure, which at least contains NH, H, Nand CH, using a high-boiling, physically acting and regenerable solvent which contains homologues of alkylene glycol-alkyl-ether and which also may contain water, the absorbed components NH, H, Nand CHbeing separated from the laden solvent in at least two further process steps at different pressure rates, thereby withdrawing at least one NH-rich and at least one CH-rich gas fraction from the solvent. This process is particularly suitable to be incorporated as unit in an ammonia production plant.

Method for the absorptive outward transfer of ammonia and methane out of synthesis gas

Process for the production of synthesis gas in conjunction with a pressure swing adsorption unit

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Bochum, Germany

Vincent Liu