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- Path: sparky!uunet!spool.mu.edu!agate!usenet.ins.cwru.edu!po.CWRU.Edu!aas7
- From: aas7@po.CWRU.Edu (Andrew A. Spencer)
- Newsgroups: rec.autos
- Subject: Re: Hydrogen & NOx's (Was: Rotary vs Pist.)
- Date: 22 Nov 1992 00:53:13 GMT
- Organization: Case Western Reserve University, Cleveland, OH (USA)
- Lines: 60
- Message-ID: <1emllpINNo33@usenet.INS.CWRU.Edu>
- References: <1992Nov22.000808.14684@infonode.ingr.com>
- Reply-To: aas7@po.CWRU.Edu (Andrew A. Spencer)
- NNTP-Posting-Host: slc5.ins.cwru.edu
-
-
- In a previous article, greg@cherokee.NoSubdomain.NoDomain (Greg Moritz) says:
-
- >ramiro@rrunner.NoSubdomain.NoDomain (Ramiro Reinoso) says:
- >
- >RR> ... I saw a display ... demonstrated that rotary engines are more
- >RR> suitablefor hydrogen fuel because the combustion chamber section
- >RR> was not the same as the intake chamber section. ...
- >
- >RR> And as far as emissions, when you burn hydrogen you end up with
- >RR> water vapor (very environmentally friendly).
- > ^^^^^^^^^^^
- >aas7@po.CWRU.Edu (Andrew A. Spencer) responded:
- >
- >AS> ... with some various complications...it sounds great..but..you have
- >AS> to inject water into the combustion chamber in order to keep certain
- >AS> nasties like nitrogen(NOx's) mostly from also deciding to steal some
- >AS> of the H's O's... it sounds realy great..but..not only would we have
- >AS> to come up with tanks practicle for a car to carry H..but also tote
- >AS> around water ...
- >
- >... but mwp@iconix.oz.au (Michael Paddon) added:
- >
- >MP> The resulting water would be vapour at exhaust temperatures;
- > ^^^^^ ^^^^^^
- >MP> ie. no we wouldn't have to "tote" it around.
- >
- >... and aas7@po.CWRU.Edu (Andrew A. Spencer) corrected:
- >
- >AS> you didn't read what i wrote, did you? like i said, you have to inject
- >AS> water into a H powered IC motor to get H2O out, otherwise you will get
- >AS> some nasty undesirable other byproducts. ...
- >
- >I think that there is a misconception as to where the NOx emissions come
- >from. The makeup of the air around us is about 80% Nitrogen and 20%
- >Oxygen (approximately). Since that N2 gets into the combustion chamber
- >and is heated up, it gets to participate in the chemical reaction with
- >the Gasoline, Hydrogen, Methanol, Natural Gas, or whatever you are using
- >as fuel.
- >
- >I believe that this misconception arises from the NASA rockets that burn
- >Hydrogen that is mixed with *pure* Oxygen. Those do indeed give off pure
- >water vapour ( which is then dumped into the atmosphere at high
- >temperature which then probably reacts with the air ... ).
- >
- >Do you know how the injected water prevents NOx's from forming?
- >Couldn't an H2 powered car use a Cat-converter?
- >
- no, i am not sure, they just said that it worked(either that, or i fell
- asleep just before they mentioned it :-) but my guess would fall among the
- lowering of temperature..but i am not for certain. they just said that
- this is what finally worked. in other words, no, it is not a hard and
- fast fact nor a rule, but the point being that H powered vehicles with
- IC motors simply are not as wonderful as they sound, and do have certain
- complications, emmisions still being one of them, since nothing is perfect.
- DREW
- --
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