# US 2023/0053522 A1 · Process for h2 and syngas production > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0053522 A1 - Document ID: US20230053522A1 - Status: Published application - Kind: A1 - Application number: 17/407,434 - Filed: 2021-08-20 - Published: 2023-02-23 - Earliest claimed: 2021-08-20 - Assignees: Air Products and Chemicals, Inc. - Applicants: Air Products and Chemicals, Inc. - Inventors: XIANG-DONG PENG; Henry Choisun Chan; Kelly Danielle Aguilar; Shihong Yan; Qiong Zhou; Shylaja Gowda - Web page: https://patentgrep.com/patent/US20230053522A1 ## CPC - C01B 3/36: using oxygen; using mixtures containing oxygen as gasifying agents - C01B 3/48: followed by reaction of water vapour with carbon monoxide - B01D 46/00: Filters or filtering processes specially modified for separating dispersed particles from gases or vapours (filtering elements B01D24/00-B01D35/00; filtering material B01D39/00; their regeneration outside the filters B01D41/00) - B01J 12/005: {carried out at high temperatures, e.g. by pyrolysis} - B01J 19/0013: {Controlling the temperature of the process} - C01B 3/52: by contacting with liquids; Regeneration of used liquids - B01J 2219/00087: with heat exchange elements outside the reactor - C01B 2203/0216: containing a non-catalytic steam reforming step - C01B 2203/0222: containing a non-catalytic carbon dioxide reforming step - C01B 2203/0233: the reforming step being a steam reforming step - C01B 2203/0238: the reforming step being a carbon dioxide reforming step - C01B 2203/0255: containing a non-catalytic partial oxidation step - C01B 2203/0283: containing a CO-shift step, i.e. a water gas shift step - C01B 2203/0288: containing two CO-shift steps - C01B 2203/0415: Purification by absorption in liquids - C01B 2203/043: Regenerative adsorption process in two or more beds, one for adsorption, the other for regeneration - C01B 2203/0445: Selective methanation - C01B 2203/0465: Composition of the impurity - C01B 2203/0475: the impurity being carbon dioxide - C01B 2203/0485: the impurity being a sulfur compound - C01B 2203/049: the impurity being carbon - C01B 2203/0833: Heating by indirect heat exchange with hot fluids, other than combustion gases, product gases or non-combustive exothermic reaction product gases - C01B 2203/0883: by indirect heat exchange - C01B 2203/0894: Generation of steam - C01B 2203/1241: Natural gas or methane - C01B 2203/146: At least two purification steps in series - Y02P 20/129: Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - 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) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A process for producing syngas that uses the syngas product from a partial oxidation reactor to provide all necessary heating duties, which eliminates the need for a fired heater. Soot is removed from the syngas using a dry filter to avoid a wet scrubber quenching the syngas stream and wasting the high-quality heat. Without the flue gas stream leaving a fired heater, all of the carbon dioxide produced by the reforming process is concentrated in the high-pressure syngas stream, allowing essentially complete carbon dioxide capture. ## Claims ### Claim 1 A process for producing syngas, the process comprising: reacting a preheated feed stream comprising methane and an oxidant selected from the group consisting of water and carbon dioxide with an oxygen-enriched stream to produce a first syngas stream comprising hydrogen, carbon monoxide, carbon dioxide, water, and soot; heating a boiler feed water stream by indirect heat exchange with the first syngas stream to produce a steam stream and a second syngas stream; and heating one or more of the steam stream and a mixed feed stream by indirect heat exchange with the second syngas stream to produce a third syngas stream, wherein the mixed feed stream comprises methane and an oxidant selected from the group consisting of water and carbon dioxide; wherein the preheated feed stream comprises the mixed feed stream. ### Claim 2 (depends on 1) The process of claim 1, wherein the temperature of the second syngas stream is between 345° C. and 455° C. ### Claim 3 (depends on 1) The process of claim 1, further comprising reacting the water and carbon monoxide in the third syngas stream to produce a shifted syngas stream; and heating one or more of the steam stream and the mixed feed stream by indirect heat exchange with the shifted syngas stream to produce a second shifted syngas stream. ### Claim 4 (depends on 1) The process of claim 1, further comprising removing soot from the third syngas stream without contacting the third syngas stream with liquid water. ### Claim 5 An apparatus for producing syngas, the apparatus comprising: a partial oxidation reactor configured to react a preheated feed stream with an oxygen-enriched stream to produce a first syngas stream comprising hydrogen, carbon monoxide, carbon dioxide, water, and soot; a first heat exchanger system for heating a boiler feed water by indirect heat exchange with the first syngas stream to produce a steam stream and a second syngas stream; a second heat exchanger system for heating one or more of the steam stream and a mixed feed stream by indirect heat exchange with the second syngas stream to produce a third syngas stream; wherein when the second heat exchanger system heats the mixed feed stream the second heat exchanger system is in fluid flow communication with the partial oxidation reactor. ### Claim 6 (depends on 5) The apparatus of claim 5, further comprising a shift reactor configured to accept the third syngas stream or a stream derived from the third syngas stream to produce a shifted syngas stream, wherein the shift reactor comprises a shift catalyst for reacting water with carbon dioxide to produce hydrogen and carbon monoxide; and a third heat exchanger for heating one or more of the steam stream and the mixed feed stream by indirect heat exchange with the shifted syngas stream to produce a second shifted syngas stream. ### Claim 7 (depends on 5) The apparatus of claim 5, further comprising a soot removal system configured to remove soot from the third syngas stream without contacting the third syngas stream with liquid water. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein the soot removal system comprises a dry filter.