# US 11,298,648 B2 · Method and installation for obtaining hydrogen > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,648 B2 - Document ID: US11298648B2 - Status: Granted - Kind: B2 - Application number: 16/343,201 - Filed: 2017-10-04 - Published: 2019-08-15 - Granted: 2022-04-12 - Earliest claimed: 2016-10-18 - Assignees: Linde Aktiengesellschaft - Applicants: Linde Aktiengesellschaft - Inventors: Volker Goke; Christian Voss - Web page: https://patentgrep.com/patent/US11298648B2 ## CPC - B01D 53/047: Pressure swing adsorption - B01D 53/229: {Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)} - B01D 53/323: {by electrostatic effects or by high-voltage electric fields} - B01D 53/8671: {Removing components of defined structure not provided for in B01D53/8603 - B01D53/8668} - B01D 53/869: {Multiple step processes} - C01B 3/50: Separation of hydrogen or hydrogen-containing gases from gaseous mixtures, e.g. purification - C01B 3/56: by contacting with solids; Regeneration of used solids - B01D 2255/1021: Platinum - B01D 2255/1023: Palladium - B01D 2255/20715: Zirconium - B01D 2255/20761: Copper - B01D 2255/20792: Zinc - B01D 2255/2092: Aluminium - B01D 2256/16: Hydrogen - B01D 2257/104: Oxygen - B01D 2259/818: Employing electrical discharges or the generation of a plasma - C01B 2203/0465: Composition of the impurity - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} ## Abstract The invention relates to a process for recovering hydrogen (b) from crude gas (a) from a coke oven (110) in which the crude gas (a) produced in the coke oven (110) is initially compressed and in which impurities are subsequently removed from the crude gas (a) by pressure swing adsorption, wherein oxygen is depleted from the crude gas (a) using nonthermal plasma prior to the pressure swing adsorption, and to a plant for recovering hydrogen from crude gas. ## Claims ### Claim 1 A process for recovering hydrogen from crude gas from a coke oven, said process comprising: initially compressing a crude gas produced in the coke oven, removing impurities from the crude gas by pressure swing adsorption, and depleting oxygen from the crude gas using nonthermal plasma prior to the pressure swing adsorption. ### Claim 2 (depends on 1) The process as claimed in claim 1, wherein oxygen is depleted from the crude gas by using the nonthermal plasma to activate a catalytic oxygen removal. ### Claim 3 (depends on 2) The process as claimed in claim 2, wherein the catalytic oxygen removal is performed using platinum and/or palladium and/or copper and/or zinc as catalyst. ### Claim 4 (depends on 2) The process as claimed in claim 2, wherein the catalytic oxygen removal is performed using at least one catalyst arranged in a plasma field of the nonthermal plasma or downstream of a plasma field of the nonthermal plasma with respect to a stream of the crude gas. ### Claim 5 (depends on 2) The process as claimed in claim 2, wherein the catalytic oxygen removal is performed using platinum and/or palladium and/or copper and/or zinc as catalyst on aluminum or aluminum oxide. ### Claim 6 (depends on 1) The process as claimed in claim 1, wherein the nonthermal plasma is produced by dielectric barrier discharge or using microwaves. ### Claim 7 (depends on 1) The process as claimed in claim 1, wherein the crude gas is pretreated before the pressure swing adsorption and after the crude gas is compressed. ### Claim 8 (depends on 7) The process as claimed in claim 7, wherein oxygen is depleted from the crude gas using the nonthermal plasma before the crude gas is pretreated and before the pressure swing adsorption. ### Claim 9 (depends on 7) The process as claimed in claim 7, wherein oxygen is depleted from the crude gas using the nonthermal plasma after the crude gas is pretreated and before the pressure swing adsorption. ### Claim 10 (depends on 1) The process as claimed in claim 1, wherein oxygen is depleted from the crude gas using the nonthermal plasma after the crude gas is compressed. ### Claim 11 (depends on 1) The process as claimed in claim 1, wherein oxygen is depleted from the crude gas using the nonthermal plasma before the crude gas is compressed. ### Claim 12 (depends on 1) The process as claimed in claim 1, wherein the crude gas is pretreated, before the pressure swing adsorption and after the crude gas is compressed, by adsorptive or catalytic means. ### Claim 13 (depends on 1) The process as claimed in claim 1, wherein the crude gas is pretreated, before the pressure swing adsorption and after the crude gas is compressed, regeneratively or nonregeneratively. ### Claim 14 (depends on 1) The process as claimed in claim 1, wherein the crude gas is pretreated, before the pressure swing adsorption and after the crude gas is compressed, using a membrane process for removal of impurities. ### Claim 15 (depends on 14) The process as claimed in claim 14, wherein oxygen is depleted from the crude gas using the nonthermal plasma before the crude gas is pretreated and before the pressure swing adsorption. ### Claim 16 (depends on 14) The process as claimed in claim 14, wherein oxygen is depleted from the crude gas using the nonthermal plasma after the crude gas is pretreated and before the pressure swing adsorption. ### Claim 17 A plant for recovering hydrogen from crude gas comprising: a coke oven in which the crude gas is producible, a compression means to which the crude gas from the coke oven is suppliable and which is adapted for compressing the crude gas, a pressure swing adsorber to which the crude gas is suppliable after exiting the compression means and which is adapted for removing impurities from the crude gas and providing hydrogen, and a plasma generator arranged upstream of the pressure swing adsorber and adapted for producing nonthermal plasma in the crude gas. ### Claim 18 (depends on 17) The plant as claimed in claim 17, further comprising at least one catalyst for removal of oxygen from the crude gas, said catalyst being arranged in a plasma field of nonthermal plasma producible by the plasma generator or being arranged downstream of a plasma field of nonthermal plasma producible by the plasma generator with respect to a stream of the crude gas. ### Claim 19 (depends on 17) The plant as claimed in claim 17, further comprising a pretreatment means through which the crude gas is conductible before the crude gas is supplied to the pressure swing adsorber. ### Claim 20 A plant for recovering hydrogen from crude gas comprising: a coke oven in which the crude gas is producible, a compressor to which the crude gas from the coke oven is suppliable and which is adapted for compressing the crude gas, a pressure swing adsorber to which the crude gas is suppliable after exiting the compressor and which is adapted for removing impurities from the crude gas and providing hydrogen, and a plasma generator arranged upstream of the pressure swing adsorber and adapted for producing nonthermal plasma in the crude gas.