Talk:Claus process

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Contents

[edit] Reasons for reverting edit by User:Otispa about Morpholine

I believe the edit about Morpholine was well intentioned. I reverted it because:

  • It was completely out of context. This is an article about the Claus process ... it is not about problems with the DGA process.
  • It was very poorly formatted by someone who seems not to have taken the time to learn how to write as per the Wikipedia manual of style.
  • The subject matter would be better written as a separate article on the DGA process. At best it only deserves a sentence or two in this article.
  • The edit refers to a "Case History" ... but includes no reference as to who wrote that case history or where it was obtained.

If User:Otispa would create a personal sandbox and write a brief article (in that sandbox) about the DGA process and its problems, I would be happy to help him format it in Wikipedia style. I would also be happy to boil it down into one or two sentences for inclusion in this article. But first, I would need to have a reference to back up the "Case History." - mbeychok 00:30, 13 February 2007 (UTC)

[edit] History?

I'm working on a project to design a unit using this process, so I appreciate the writeup. One thing I've not been able to find is, why is this called the "Claus Process"? I would guess a pretty smart guy named Claus figured this out. Does anyone have any more historical information that could be added to the article? Thanks. Ultimate ed 13:30, 8 June 2007 (UTC)

The process was invented by Carl Friedrich Claus, a chemist working in England. A British patent was issued to him in 1883. The process was later significantly modified by a German company called I.G.Fabenindustrie A.G. See this online citation [1] - mbeychok 16:34, 8 June 2007 (UTC)

[edit] how to remove H2S from sour gas containing less than 25% H2S

Claus process is only applicable for rich H2S content (above 25%)sour gas. What processes are used to remove lower H2S content sour gas? Pangsm 14:25, 24 August 2007 (UTC)

The SulFerox process (licensed by Shell Oil) is said to be suitable for sulfur conversion/recovery from gas streams containing very low concentrations of H2S. I am not sure, but I believe that the LoCat process (licensed by Merichem) is also suitable for such applications. - mbeychok 15:58, 24 August 2007 (UTC)
I'm a little late on this one here, but the >25% H2S in the feed is for the standard, straight-through set up. There are mutliple configurations that you can use for a Claus plant that will allow you to operate with a leaner feed. 15-30% H2S feeds can be handled with either a split flow configuration or "straight through" with an air/feed preheat. 10-15% H2S feeds can be handled with a split flow configuration AND a preheat. 5-10% feeds need a split flow configuration, feed/air preheat, and fuel addition. (Or a direct oxidation method like Mbeychok mentioned). Feeds of <5% require a direct oxidation method (or need to be fed to an amine treatment unit and recycled back to the Claus plant in higher concentrations). These rules of thumb are from the Gas Processors Association Handbook.
...I guess I should actually just add this to the article...Goatchze (talk) 19:36, 4 February 2008 (UTC)

[edit] Purification beyond 97%

The article says this process eliminates 97% of the H2S. Does anyone know how the tail gas purification process works? How about Shell Claus Offgas Treating (SCOT)? I believe 3% H2S is still too high for the gas to be used as fuel under US environmental regs. —Preceding unsigned comment added by 138.32.32.166 (talk) 09:34, 25 March 2008 (UTC)

97% refers to the recovery of H2S to elemental sulfur in the two bed Claus unit itself, NOT recovery from the original sulfur containing stream. Typically the tail gas is incinerated and is not used as a fuel. Addition of tail gas treaters can increase recovery to the 99+% range. SCOT converts any remaining sulfur species back to H2S so that they can be absorbed in an amine column and recycled back as Claus feed. Goatchze (talk) 19:36, 7 May 2008 (UTC)