Talk:Supercritical fluid

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Natural occurences - submarine volcanoes[edit]

This section is rubbish. It confuses two very different natural phenomena - volcanoes and hydrothermal circulation, which can be closely related but are not the same thing at all. I'm going to attempt to completely re-write this.

139.166.247.131 (talk) 15:24, 6 February 2014 (UTC)

Graph[edit]

What's with the graph? Cleanup this articles, requires. Wobblies 21:40, 14 June 2007 (UTC)

Supercritical Fluid Articles[edit]

The articles on this subject are a bit haphazard, with some duplicate articles (critical point drying and supercritical drying are synonomous, yet each has an article), and much duplicated information in different articles. For example, there is supercritical fluid, supercritical carbon dioxide, critical temperature and critical point, all of which essentially begin by describing the same thing. I am considering major editing on these topics to create a more logical structure, linking to eachother in a more logical way. I would start with this article, and use it as a "hub" to get to the others. This would involve cleaning up and editing to clarify the descriptions of the graphs, adding some more sub headings, particularly under "applications", with a brief discription. I would link these brief descriptions to existing articles in most cases, where there is one, and create a new one where there was not, to be added later. Some articles could be replaced with a link to this article (e.g. supercritical carbon dioxide, critical point, critical temperature) and a new link created for critical pressure. (The critical point article is particularly unclear, as it contains different meanings of critical point in the same article, requiring disambiguation?) I am fairly new to this, and don't want to step on toes, is this the right way to go about it? Stainless316 12:01, 16 November 2007 (UTC)

Edit Supercritical Fluids[edit]

I have changed the article in line with my previous comment. I have tried to keep the information as it was previously, and included all the applications, added a new article under "supercritical fluid extraction". Work is ongoing, any comments welcome.Stainless316 (talk) 11:02, 7 January 2008 (UTC)

merge from supercritical fluid[edit]

I have added tag suggesting merging supercritical CO2 into this article. In fact i have already added most of the content from there into this article, so all it needs is re-directing. —Preceding unsigned comment added by Stainless316 (talkcontribs) 20:10, 11 December 2008 (UTC)

Room pressure supercritical fluid[edit]

  • Is there any supercritical fluid at pressure?--MathFacts (talk) 15:01, 23 July 2009 (UTC)
  • The "therefore" in the part which describes the property of in the high-pressured tank does not make sense. The logic ought to be like :a) nitrogen (or compressed air) in a gas cylinder above this pressure is actually a supercritical fluid and b)nitrogen in a gas cylinder behave like a kind of ordinary gas --> they are called "permanent gases".

mislabeled vertical axis?[edit]

Am I confused or is the diagram mislabeled? In both the "supercritical fluid" and "supercritical carbon dioxide" articles, the diagram has a vertical axis in P(bars), and shows the critical point of CO2 at about 7 bars. The text in both places gives the critical pressure as 7.38 MPa, aka 73.8 bars. I'm not confident enough in this area to go altering the diagram (which in any case would require me to learn how to edit SVG), but it certainly looks to me like the diagram is wrong. I'd love an explanation one way or the other. Paleolith (talk) 17:31, 12 March 2012 (UTC)

re: Carbon capture and storage and enhanced oil recovery[edit]

The section titled Carbon capture and storage and enhanced oil recovery contains the following sentence:

'....The CO2 is separated from other flue gases either pre- or post-combustion.....'

Separating CO2 from other flue gases pre- combustion does not make sense, for two reasons. First, flue gas describes the gas created by combustion, so there is no pre- combustion flue gas. Second, CO2 is present only in minute quantities prior to combustion, so it isn't really available to be separated pre- combustion. — Preceding unsigned comment added by 24.250.167.105 (talk) 17:42, 23 September 2012 (UTC)

Thermodynamics of supercritical fluids[edit]

I feel something strange in the style of the text while reading the second paragraph of this section. And there is a duplicate reference in it as well. Maybe someone else smells the fish? 82.31.160.48 (talk) 00:51, 8 August 2014 (UTC) Let me stress it again - I feel that Mr. Bolmatov might be trying to use Wikipedia to promote himself a bit.131.227.125.163 (talk) 13:12, 16 January 2015 (UTC)

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Natural occurrence/ Planetary atmospheres[edit]

This section describes temperatures being far above the critical point but then goes on to describe a smooth transition to liquid. There should be no liquid above the critical temperature. 2600:387:2:805:0:0:0:86 (talk) 03:07, 28 November 2016 (UTC) BGriffin