Category Archives for Gas Sweetening Processes

Gas Permeation

Gas permeation is based on the mass transfer principles of gas diffusion through a permeable membrane. In its most basic form, a membrane separation system consists of a vessel divided by a single flat membrane into a high- and a … Continue reading

19. September 2009 by Jack
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Distillation

The Ryan-Holmes distillation process uses cryogenic distillation to remove acid gases from a gas stream. This process is applied to remove CO2 for LPG separation or where it is desired to produce CO2 at high pressure for reservoir injection.

19. September 2009 by Jack
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Sulfide Scavengers

Sour gas sweetening may also be carried out continuously in the flowline by continuous injection of H^S scavengers, such as amine-aldehyde condensates. Contact time between the scavenger and the sour gas is the most critical factor in the design of … Continue reading

19. September 2009 by Jack
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Sulfa-Check

Sulfa-Check® process uses sodium nitrite (NaNO2) in aqueous solution to oxidize H2S to sulfur. This process was developed and patented by NL Treating Chemicals and is now a product of Exxon Energy Chemicals. It will generate NOX in presence of … Continue reading

19. September 2009 by Jack
Categories: Direct Conversion of H2S to Sulfur | Tags: | Leave a comment

IFP Process

The Institute Francais du Petrole has developed a process for reacting H2S with SO2 to produce water and sulfur. The overall reaction is 2H2S + 862 -» 2H2O + 3S. Figure 7-10 is a simplified diagram of the process. This … Continue reading

19. September 2009 by Jack
Categories: Direct Conversion of H2S to Sulfur | Tags: | Leave a comment

Stretford Process

An example of a process using O2 to oxidize H2S is the Stretford® process, which is licensed by the British Gas Corporation. In this process the gas stream is washed with an aqueous solution of sodium carbonate, sodium vanadate, and … Continue reading

19. September 2009 by Jack
Categories: Direct Conversion of H2S to Sulfur | Tags: | Leave a comment

LOCAT Process

The LOCAT® process is a liquid phase oxidation process based on a dilute solution of a proprietary, organically chelated iron in water that converts the hydrogen sulfide to water and elemental sulfur. The process is not reactive to CO2. A … Continue reading

19. September 2009 by Jack
Categories: Direct Conversion of H2S to Sulfur | Tags: | Leave a comment

Claus Process

This process is used to treat gas streams containing high concentrations  of H2S. The chemistry of the units involves partial oxidation of  hydrogen sulfide to sulfur dioxide and the catalyticaily promoted reaction  of H2S and SO2 to produce elemental sulfur. … Continue reading

19. September 2009 by Jack
Categories: Direct Conversion of H2S to Sulfur | Tags: | Leave a comment

Direct Conversion of H2S to Sulfur

The chemical and solvent processes previously discussed remove acid gases from the gas stream but result in a release of H2S and CO2 when the solvent is regenerated. The release of H2S to the atmosphere may be limited by environmental … Continue reading

19. September 2009 by Jack
Categories: Direct Conversion of H2S to Sulfur | Tags: | Leave a comment

Rectisol Process

The German Lurgi Company and Linde A. G. developed the Rectisol® process to use methanol to sweeten natural gas. Due to the high vapor pressure of methanol this process is usually operated at temperatures of -30 to ~100°F. It has … Continue reading

18. September 2009 by Jack
Categories: Physical Solvent Processes | Tags: | Leave a comment

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