Christian,
I don't have PS121 anywhere on file. So I can't say with any
certainty anything other than one was the interim standard and
6751 is the final standard.
As for carbon residue, it's the measure of the carbon depositing
tendencies of a fuel oil, considered to be an approximation.
We haven't received the standard for the particular test method,
so it's pretty difficult to guestimate how critical your variance
would be or if closed cup is the or an accepted method.
Just call me a mushroom at the moment.
Todd Swearingen
- Original Message -
From: Christian [EMAIL PROTECTED]
To: biofuel@yahoogroups.com
Sent: Sunday, June 09, 2002 2:31 PM
Subject: [biofuel] Re: (Todd)
Thanks Todd.
I assume all other values the same as PS121?
i.e., Sulfur, copper stri corrosion, cloud point, carbon residue,
carbon
residue (Ramsbottom), Acid nmber Free glycerin.
One question: I tested my carbon residue (closed cup) and it
added up to
0,0711% (as opposed to 0,05 specified by ASTM). How critical is
this, and
where does this residue come from?
Thanks again,
Christian
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Sent: Sunday, June 09, 2002 2:21 PM
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Date: Sun, 9 Jun 2002 13:18:07 -0400
Subject: Re: ASTM Flash point was Re: [biofuel] water (Keith)
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Christian,
Here are the specs.
Flash point (closed cup): 130*C minimum (150*C average)
Water and sediment: 0.050 % by volume, maximum
Kinematic viscosity at 40*C: 1.9 - 6.0 mm2/s
Sulfated ash: 0.020 % by mass, maximum
Sulfur: 0.05 % by mass, maximum
Cetane: 47 minimum
Carbon residue: 0.050 % by mass, maximum
Total glycerine (free glycerine and unconverted glycerides
combined): 0.240 % by mass, maximum
Phosphorous content: 0.001 % by mass, maximum
- Original Message -
From: Christian [EMAIL PROTECTED]
To: biofuel@yahoogroups.com
Sent: Sunday, June 09, 2002 1:04 PM
Subject: Re: ASTM Flash point was Re: [biofuel] water (Keith)
Todd,
I«ve just asked Keith, but I just as well might ask you.
Could you send me the BD specs as per ASTM D6751?
I«m still working with PS121 (which I have), but it seems some
values have
been revised.
Thanks,
Christian
- Original Message -
From: Appal Energy [EMAIL PROTECTED]
To: biofuel@yahoogroups.com
Sent: Sunday, June 09, 2002 1:54 PM
Subject: ASTM Flash point was Re: [biofuel] water (Keith)
Flash Point: Above 118¼C (ASTM PS121 specifies higher than
100¼C, so I
didn«t go much further)
The new ASTM D-6751 standard specifies 130 deg C, I don't
know
why.
Germany and Czech specify 110, all others 100. Maybe it's
all
just
politics, the rapeseed vs soy game.
Christian and Keith,
As per ASTM D-6751, paragraph X1.21:
The flash point for biodiesel is used as the mechanism to
limit
the level of unreacted alcohol remaining in the finished
fuel.
As per ASTM D-6751, paragraph X1.22:
The flash point specification for biodiesel is also of
importance in connection with legal requirements and safety
precautions involved in fuel handling and storage, and is
normally specified to meet insurance and fire regulations.
Paragraph X1.23 discusses wide variability with the accepted
test
method. This resulted in 130*C being chosen to insure that a
low
end flash point of 100*C is never compromised. Improvements
to
testing are being evaluated, which could result in a revised
standard at some point in the future.
Todd Swearingen
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