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Natural Science Forum / Physics / Research / July 2008Q:Negative water pressure electrolysis?
This was posted on Sci.math but with little response so sorry for cross posting. Is this the right Usenet group for this question? Q:Negative water pressure electralosis! Posted: Jul 3, 2008 12:56 PM on Sci.math Negative water pressure (Stretching water). Were there ever any experiments conducted for extracting hydrogen through electrolysis from sea water using a negative water pressure device? If so did it improve the efficiency of producing hydrogen. Also where would the hydrogen and oxygen go, would it rise to the top? If possible, would it reduce the negative pressure of the salt water as more hydrogen and oxygen bonds are broken until the water reaches atmospheric pressure? I googled it and found nothing! Dan > This was posted on Sci.math but with little response so sorry for cross > posting. Is this the right Usenet group for this question? [quoted text clipped - 13 lines] > > I googled it and found nothing! I would have thought that negative water pressure would have lasted until the first few bubbles of gas re-pressurised it.  SignatureDirk http://www.transcendence.me.uk/ - Transcendence UK Remote Viewing classes in London > This was posted on Sci.math but with little response so sorry for cross > posting. Is this the right Usenet group for this question? [quoted text clipped - 13 lines] > > I googled it and found nothing! It's a silly thing (scam). You cannot get the pressure below the vapor pressure of water. Reaction rate increases with concentration. Increasing the size of bubbles for a given mass of gaseous products blocks electrode area. You do not electrolyze saline, you electrolyze aqueous carbonate or hydroxide. Chloride to chlorine rather than water to oxygen. Seawater is loaded with biological crud that fouls electrodes. http://www.mazepath.com/uncleal/htoo.htm Civilization knows what it is doing, Enviro-whiners do not. Do not invest against thermodynamics. SignatureUncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/lajos.htm#a2 On Jul 5, 5:36 pm, fasttrac...@att.net wrote: > This was posted on Sci.math but with little response so sorry for cross > posting. Is this the right Usenet group for this question? [quoted text clipped - 15 lines] > > Dan Are you sure you don't just mean positive pressure which is less than atmospheric? To produce negative pressure you would need something like a very strong cylinder with plunger at the bottom having >~ a ton of weight hanging off it for every square foot of surface area. First thing to bear in mind is that the boiling point of water drops as pressure drops, so the water will rapidly boil. Secondly, from PV=nRT, as pressure drops to zero, volume of resultant steam expands to infinity, unless its temperature drops to absolute zero. > On Jul 5, 5:36 pm, fasttrac...@att.net wrote: > [quoted text clipped - 33 lines] > > - Show quoted text - Yes I did mean negative pressure as you explained it above! By reading yours and other post the water could not be sea water but fresh water treated with the right ingredients for the most efficient electrolysis. There is a point in negative pressure that the volume increases but the pressure remains the same on a certain plateau, then as the negative pressure increases byound this plateau the volume begins to increase again until it reaches the critical point of negative pressure where the water will become like a water droplet in a vacuum. See ----- The hydogen bond network. The second page @ this site gives a good example of this with a graph. So hypothetically at any point in negative water pressure can electrolysis be preformed up to but not including the the water droplet in a vacumn stage? If this is possible then would it be less or more efficient for electrolysis then water pressure at sea level? Dan On Jul 13, 7:53 pm, fasttrac...@att.net wrote: > > On Jul 5, 5:36 pm, fasttrac...@att.net wrote: > [quoted text clipped - 49 lines] > > The second page @ this site gives a good example of this with a graph. There is no way to tell which site you mean. How do you prevent this water from vaporising while still at positive but low pressure? It seems to me that this could at best be a temporary effect if you reduce pressure quickly enough..........hence not exploitable in the way you envisage. |
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