Hi,
Thanks, for the feedback.
My goal in getting into working with biodiesel is to produce enough for myself
as well as potentially selling it on a small scale. Continous processing
looked very attractive because I would not have to store all that much product
at any one time. I am not quite ready to give up on the idea yet, I was just
wondering if there are any other serious papers or info on the web regarding
the processing of wvo into biodiesel using methods other than the acid/based
methanol...
Please do not in anyway take this to mean that I am being arrogant and assuming
that I can do better than anyone here, I just like to have as much information
as possible. I will probably end up making the same decision as others in this
list have made, but it would not be like me to just accept the generaly
accepted practice. If that was the case I would not be looking at biodiesel or
any alternative energy for that matter..
I agree that supercritical methanol is dangerous, but I think we should be
clear that the 24000+ psi injector pump on every volkswagen TDI or any direct
injection engine is not a dangeours thing. If a fuel line on a diesel
brakes/leaks you do not get the type of high pressure stream like the ones used
for cutting stone. Just because you have pressure does not mean that you have
flow and without flow even pressures in the area of 100 KPsi are not dangerous
when we are talking about uncompressable fluids. The problems would arise from
the supercritical methanol, when exposed to the atmosphere at such a high temp
it would expand very rapidly and potentially explode.
Thanks,
-Rui
PS: Water cutting is not considered an obscure technology as it is widely used
in precision cutting of hard materials.
--- kirk [EMAIL PROTECTED] wrote:
Biofuels has many powerful
enemies, who'd no doubt be most delighted if we started killing
ourselves (and others), they'd kick us with it for years to come.
++
If biofuel becomes a big enough threat I am sure they will arrange some
demonstrations to encourage laws to outlaw home production.
They use the law to control competition.
Kirk
-Original Message-
From: Keith Addison [mailto:[EMAIL PROTECTED]
Sent: Wednesday, February 05, 2003 11:01 AM
To: biofuel@yahoogroups.com
Subject: RE: [biofuel] Introduction and some questions - Newbie
Hi Kirk
There is an out of print book Novel Drilling Technoques that in the
second
edition talks about cutting sandstone at several meters per second with
liquid pressures of that magnitude. Granite I think was 7cm per second if
memory serves.
Obscure technology.
Anyway, you can lose a lot more than just soft tissue. Even a couple
hundred
psi can inject you like a hypodermic needle. Probably wouldn't be a good
thing to happen.
Probably not very good, no. Then add the not very friendly nature of
supercritical methanol at 350 deg C (BP 65 deg C). NIMBY thankyou.
I wonder why Philip Hill has put that thing on his website. He's
aiming at small-scale folks after all, it's no use to them - well, it
might be, but anyone capable of making something of it in a safe and
responsible manner sure isn't going to be buying any plastic biod
processors from Philip Hill. Whereas there's a good chance someone
who isn't capable might be tempted to blow his head off. DIY
biodiesel has been remarkably accident-free so far, I think it's
maybe worth a bit of vigilance and foresight to help keep it that
way, short of being a squeaky-kleen nanny. Biofuels has many powerful
enemies, who'd no doubt be most delighted if we started killing
ourselves (and others), they'd kick us with it for years to come.
Best
Keith
=
-
Rui Fernandes
[EMAIL PROTECTED]
Boston - USA
-
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