Re: scCO2 storage

From: clutchbabe (clutchbabe_at_hotmail.com)
Date: 12/29/04 

Date: 29 Dec 2004 12:45:09 -0800

MARK-TA, you are an unhelpful ass. This is a legitimate question and I
can safely assume you only exist in the academic area otherwise you
would know that companies in American survive in todays economy by
adapting. This means becoming "expert on the topic" enough to discern
whether quoting a request is feasible or not. As I mentioned I am not
a chemist but I have been able to find that the common way to get scCO2
is to store at CO2 and pump to scCO2, however, I cannot simply tell a
customer we cannot do something because it hasn't been done. However,
as Uncle Al has provided useful information as to a safety risk that
would not have otherwise known per se, I can tell them we will not be
able to quote a scCO2 storage system due to safety concerns implied by
the stored chemistry. You have no class and I seriously hope you find
a way to stay in academia, if you have made it that far, as you
certainly will not survive in a professional arena.
mark_tarka@yahoo.com wrote:
> clutchbabe wrote:
>
> "Crutchbabe"?
>
> > I work for a small company who has been asked to provide a quote
for
>
> Uhm, yeh.
>
> > some pressure vessels (enough to store 70 cubic meters of
> supercritical
> > CO2 at 20MPa).
>
> You don't _store_ SCCO2, you use normal tanks
> of CO2 that feed a pump associated with your
> equipment; that pump creates the SCF as you
> need it.
>
> > I am not a chemist, and have been having some trouble
> > finding simple information to guide me in this task, I am hoping
> > someone may be willing to provide some answers or direct me to a
> place
> > to find them. (Uncle Al, I am specifically hoping you answer)
>
> That's what UA meant to say :-)
>
> > First of all, how to you find the temperature at 20MPa prior to
> > providing the heat to make scCO2? Besides a pressure relief valve,
> are
> > there any other special pieces needed for the vessel (i.e. does it
> need
> > to be insulated etc). Does scCO2 or regular CO2 have material
> > restrictions (i.e. SST vessels or will carbon steel work).
Basically,
> I
> > have designed 31 pressure vessels (36" i.d. x 10ft long, 4" thick)
to
> > withstand the pressure and I am wondering if there is more to it
then
> > that. The end-user will be supplying the scCO2, the bank of
vessels
> > will be manifolded together so that all fill or empty at the same
> time.
>
> Of course, UA and I could be wrong and your end-
> user will die while using your equipment. Do you
> have adaquate liability insurance?
>
> > I have proposed a low pressure tank with a pump to them but it was
> not
> > an acceptable solution. They must have it this way...
>
> "They" are, of course, morons (assuming that
> this is a legitimate post; unlikely, given
> the state of the art in the industry at this
> time :-)
>
>
> Mark (Then there was the time I had to
> use SCCO2 to extract the essence
> of plaid fabric in order to discern
> the manufacturer; it was a criminal
> case -- the girl shot the man in the
> back while he was sleeping. Of the
> 28 bullets striking the victim, 3
> passed through his boxer shorts,
> plaid, and the threads carried into
> the body were part of the D.A.'s
> evidence against her -- she had
> worn the shorts earlier and the
> fabric contained stains from her
> anus and vagina :-)

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