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Sulfur recovery - claus process

Applications: The Claus process has been developed to recover elemental sulfur from H2S containing gases originating from gas treating plants such as alkanolamine units or physical solvent plants. Modern Claus plants should be able to process H2S/NH3 containing gases as well, originating from Sour Water Strippers.

Description: The Claus process is based on the combustion of part of the H2S to SO2 and the subsequent reaction between the remaining H2S and the SO2 produced, forming sulfur. There are two main varieties of the Claus process: straight through and split flow. The straight through process is used for feed gas containing more than 50% H2S while split flow is applied for gases containing 50 to 15% H2S. The sulfur recovery process consists of a thermal stage (combustion chamber, waste heat boiler) and two or three catalytic reaction stages (reheater, reactor and condenser). In the thermal stage, the Claus reaction takes place at a high temperature level (950-1350°C). The sulfur produced in this stage is condensed either in the waste heat boiler or in the condenser. Subsequently, the gas is reheated to a temperature of 200-300°C before introduction into each reactor stage. The heat generated from the reactions is used for steam production. In the thermal stage, a choice can be made between the production of LP, MP or HP steam. In the sulfur condensers LP steam is generated. The tail gas is sent to an incinerator or tail gas treater.

Other Literature

Plant control - advanced burner control (plus)

Applications: The design intent is to have accurate SRU tail gas quality control in order to optimize sulfur recovery. ABC provides that. It is clearly superior over conventional SRU control and has always been Jacobs Comprimo®’s control system of choice for the EUROCLAUS®/SUPERCLAUS® ...


Sulfur recovery - claus process

Applications: The Claus process has been developed to recover elemental sulfur from H2S containing gases originating from gas treating plants such as alkanolamine units or physical solvent plants. Modern Claus plants should be able to process H2S/NH3 containing gases as well, originating from Sour Water ...


Sulfur recovery - EUROCLAUS® process

Applications: The EUROCLAUS® process recovers elemental sulfur from H2S-containing gases originating from gas treating and sour water stripper plants. The EUROCLAUS® process is an improvement of the SUPERCLAUS® process. Yields from 99.3 up to 99.5% overall sulfur recovery, without any further ...


Gas treating (refinery / natural gas) ADIP process

Applications: The ADIP process is a regenerative process developed to selectively reduce H2S in gas to very low concentrations in the presence of CO2. The ADIP process uses an aqueous solution of diisopropanol amine (DIPA) or the aqueous solution of methyldiethanol amine (MDEA). MDEA is used for those ...


Liquid hydrocarbon treating (LPG/PP/BB) - ADIP process

Applications: Besides its use as a regenerative process for the reduction of H2S to very low levels in gases, the ADIP process is also used to selectively reduce H2S and COS to very low levels in liquid hydrocarbons, such as propane-propylene (PP), butanebutene (BB), LPG and NGLs. The process is based ...


Claus tail gas treating - low temperature SCOT process

Applications: The Shell Claus Off -gas Treating (SCOT) process has been developed to remove sulfur compounds from Claus tail gas to comply with stringent air emissions regulations. The conventional SCOT process is able to easily meet less than 250 ppmv total sulfur in the SCOT off gas, which corresponds ...


Claus tail gas treating - SCOT process

Applications: The Shell Claus Off -gas Treating (SCOT) process has been developed to remove sulfur compounds from Claus tail gas to comply with stringent air emissions regulations. The standard SCOT process is able to easily meet less than 250 ppmv total sulfur in the SCOT off gas, which corresponds ...


Sulfur recovery - subdewpoint - SUPERCLAUS® process

Applications: The SubDewPoint (SDP)-SUPERCLAUS® combi-process is a convenient solution for existing SDP units to increase the overall sulfur recovery to at least 99.5% without any further tail gas clean up.

Description: The SDP-SUPERCLAUS® process adds the selective oxidation stage ...


Sulfur handling - Shell sulfur degassing process

Applications: The Shell Sulfur Degassing Process has been developed to remove H2S and H2Sx from liquid sulfur eliminating potential toxic and explosion hazards associated with handling, transport and storage of liquid sulfur. Elemental sulfur produced by the Claus process contains both physically dissolved ...


Sour water stripper

Applications: Many process units throughout a refinery generate significant quantities of sour water. Sour water collected within a refinery contains both H2S and NH3. These components are present as ammonium hydrosulfide (NH4HS) within the sour water. NH4HS is the salt of a weak base and a weak acid. ...