Process for producing dry, sulfur-free, CH[sub 4]-enriched synthesis or fuel gas

Patent · Tue Aug 03 04:00:00 EDT 1993

OSTI ID:6368674

Child, E T; Lafferty, Jr, W L; Suggitt, R M; Jahnke, F C

A process is described for the production of a dry, sulfur-free methane enriched synthesis gas or fuel gas stream comprising: (1) cooling a particulate-free raw synthesis or fuel gas feed stream comprising H[sub 2], CO, CO[sub 2], H[sub 2]O, N[sub 2], H[sub 2]S, COS and with or without methane to a temperature in the range of about 60 F to 130 F and separating out at least a portion of water condensate; (2) mixing together said cooled raw synthesis or fuel gas from (1) and a portion of cryogenic liquefied natural gas (LNG) thereby further cooling the new synthesis or fuel gas to a temperature in the range of about [minus]75 F to 60 F; (3) directly contacting the mixture from (2) in an acid-gas removal zone with liquid acid-gas absorbent solvent thereby absorbing sulfur-containing compounds, water, and at least a portion of the CO[sub 2], and thereby producing acid-gas rich liquid absorbent solvent containing dissolved water and a dry stream of methane enriched synthesis or fuel gas; (4) separating said acid-gas rich liquid absorbent from said dry stream of methane enriched synthesis or fuel gas comprising H[sub 2], CO, CH[sub 4], and substantially no sulfur-containing gas or moisture; (5) regenerating the separated acid-gas rich liquid absorbent solvent to remove the sulfur-containing gas and the dissolved water; and (6) introducing regenerated liquid acid-gas absorbent solvent into said acid gas removal zone.

• Assignee: Texaco Inc., White Plains, NY (United States)
• Patent Number(s): A; US 5232467
• Application Number: PPN: US 7-900388
• OSTI ID: 6368674
• Country of Publication: United States
• Language: English

Related Subjects

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ADSORBENTS
ALKANES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CARBON OXYSULFIDE
CHALCOGENIDES
CHEMICAL REACTIONS
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CRYOGENIC FLUIDS
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
ENRICHMENT
EXTRACTION
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
LIQUEFIED GASES
LIQUEFIED NATURAL GAS
METHANE
MOISTURE
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NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
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SEPARATION PROCESSES
SOLVENT EXTRACTION
SULFIDES
SULFUR COMPOUNDS
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SYNTHESIS GAS
VAPORS
WATER REMOVAL
WATER VAPOR