Process for producing dry, sulfur-free, CH[sub 4]-enriched synthesis or fuel gas
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):
- US 5232467; A
- Application Number:
- PPN: US 7-900388
- OSTI ID:
- 6368674
- Resource Relation:
- Patent File Date: 18 Jun 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
ADSORBENTS
REGENERATION
FUEL GAS
DESULFURIZATION
WATER REMOVAL
SYNTHESIS GAS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXYSULFIDE
COOLING
CRYOGENIC FLUIDS
ENRICHMENT
HYDROGEN
HYDROGEN SULFIDES
LIQUEFIED NATURAL GAS
METHANE
MOISTURE
NITROGEN
SOLVENT EXTRACTION
SULFUR CONTENT
WATER VAPOR
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENERGY SOURCES
EXTRACTION
FLUIDS
FOSSIL FUELS
FUELS
GAS FUELS
GASES
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUEFIED GASES
NATURAL GAS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REMOVAL
SEPARATION PROCESSES
SULFIDES
SULFUR COMPOUNDS
VAPORS
030300* - Natural Gas- Drilling
Production
& Processing
010402 - Coal
Lignite
& Peat- Purification & Upgrading