Scribd
Upload
257 views1 page

Sulphur Recovery Unit

The document discusses a sulphur recovery unit (SRU), which extracts elemental sulphur from hydrogen sulfide (H2S) gas. H2S is separated from crude oil during processing and sent to the SRU. The SRU uses the Claus process to combust some H2S to form sulfur dioxide, then react the sulfur dioxide with the remaining H2S to form elemental sulfur and steam using a catalyst. Up to 97% of the H2S can be converted to sulfur using multiple reactors in this process. Any remaining H2S in the tail gas may also be removed using a tail gas treatment absorber.

Uploaded by

Kmt_Ae
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
257 views1 page

Sulphur Recovery Unit

The document discusses a sulphur recovery unit (SRU), which extracts elemental sulphur from hydrogen sulfide (H2S) gas. H2S is separated from crude oil during processing and sent to the SRU. The SRU uses the Claus process to combust some H2S to form sulfur dioxide, then react the sulfur dioxide with the remaining H2S to form elemental sulfur and steam using a catalyst. Up to 97% of the H2S can be converted to sulfur using multiple reactors in this process. Any remaining H2S in the tail gas may also be removed using a tail gas treatment absorber.

Uploaded by

Kmt_Ae
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 1

e nggcyclo pe dia.

co m

http://www.enggcyclo pedia.co m/2011/05/sulphur-reco very-unit/

Sulphur Recovery Unit

Usually crude oil extracted f rom geological sources is accompanied by hydrogen sulphide gas (H2S). T his H2S is separated f rom rest of the oil at the atmospheric distillation unit along with lighter hydrocarbons and collectively termed as sour gas. H2S is separated f rom hydrocarbons at the amine treatment unit and H2S rich gas f low is sent to sulphur recovery unit (SRU) f or extracting elemental sulphur f rom H2S gas. T he basic process used in SRU is Claus Process which involves combustion of a part of H 2S gas to f orm SO2. Later this SO2 is reacted (conversion) with H2S in presence of catalyst (Cobalt / molybdenum / aluminum oxide ) to f orm elemental sulphur and steam. T he main chemical reactions involved are: 2H2S + 3O2 2SO2 + 2H2O (Combustion reaction) 4H2S + 2SO2 6S + 4H2O (Conversion reaction) Note that around one third of the H2S is f irst combusted and then reacted with rest of the H2S to give elemental sulphur and steam as end products. Generally upto 97% of H2S to elemental sulphur is achievable with the use of multiple conversion reactors. If the remaining H2S has to be removed f rom the tail gas due to environmental concerns, the remaining tail gas can be sent to a Tail Gas Treatment (T GT ) absorber.

You might also like