Hydrogen sulfide concentrator for acid gas removal systems

Patent · Tue Dec 30 04:00:00 EST 1980

OSTI ID:6556220

Hegarty, W P; Nicholas, D M

A novel method is disclosed for treating a contaminated gas such as a contaminated natural gas or a synthesis product gas from the partial oxidation of petroleum or coal to concentrate and remove hydrogen sulfide at a reduced energy and capital requirement. Hydrogen sulfide in the contaminated stream is absorbed to form a hydrogen sulfide rich solvent which includes co-absorbed carbon dioxide, which is then removed to prevent dilution of the concentrated hydrogen sulfide formed when the solvent is regenerated. The solvent leaving the hydrogen sulfide absorber is heated before entering a high pressure stripper column wherein the co-absorbed carbon dioxide is stripped from the solvent, preferably by stripping with nitrogen or a portion of the product gas, and the carbon dioxide is recycled to the hydrogen sulfide absorber. The co2 stripper is operated at a pressure not substantially below the pressure of the hydrogen sulfide absorber , eliminating the need for large compressors required in conventional methods to recycle the carbon dioxide.

• Assignee: Air Products And Chemicals Inc
• Patent Number(s): US 4242108
• OSTI ID: 6556220
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
02 PETROLEUM
020400 -- Petroleum-- Processing
03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL GASIFICATION
DESULFURIZATION
ENERGY CONSUMPTION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
NATURAL GAS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
REMOVAL
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS GAS
THERMOCHEMICAL PROCESSES