Hello Jan:
All the oils have some diferences, depending of
quantity of carbon chain and the quantity of single,
double or triple bond between the carbon atoms.
This 2 features will be the most important for quality
oil and will be determinatings for 2 parameters:
IODINE NUMBER: this is one kind of measure to know how
satured or insatured (quantity of single, double or
triple bond between the carbon atoms)is an oil.
The oils with high iodine number has lower gelling
temperatures and the inverse. The norm E DIN 51606
limit this number in 115, but I thinck that is a
"political" limitation, because with this limit the
rapeseed is able to biodiesel and sunflower and
soybean aren«t. The europeans don«t want introduce the
soybean cultivation in Europe. In USA this parameter
don«t exist.
CETANE NUMBER: this is a important parameter of
efficience in the combustion, and is determinated by
the long of the chains, it«s uniformity and the
saturation of the oil.
When a oil is more satured have more cetane number but
higher gelling temperatures.
When a oil is more insatured have less cetane number
but lower gelling temperatures.
Look at this information:
This are diferent oils with their melting temperatures
as: oil, methil esters, ethil esters and their Iodine
Numbers and Cetane numbers.
______________________________________________________
| Melting Range¼C |Iodine |Cetane |
Oil/Fat | Methil Ester | Ethil Ester |number |number |
------------------------------------------------------
Rapeseed oil, h. eruc.| 5 | 0 | -2 |97 to 105 | 55 |
Rapeseed oil, i. eruc.| -5 |-10 |-12 |110 to 115| 58 |
Sunflower oil |-18 |-12 |-14 |125 to 135| 52 |
Olive oil |-12 | -6 | -8 | 77 to 94 | 60 |
Soybean oil |-12 |-10 |-12 |125 to 140| 53 |
Cotton seed oil | 0 | -5 | -8 |100 to 115| 55 |
Corn oil | -5 |-10 |-12 |115 to 124| 53 |
Coconut oil |20 to 24| -9 | -6 | 8 to 10 | 70 |
Palmkernel oil |20 to 26| -8 | -8 | 12 to 18 | 70 |
Palmoil |30 to 38| 14 | 10 | 44 to 58 | 65 |
Palm oleine |20 to 25| 5 | 3 | 85 to 95 | 65 |
Palm stearine |35 to 40| 21 | 18 | 20 to 45 | 85 |
Tallow |35 to 40| 16 | 12 | 50 to 60 | 75 |
Lard |32 to 36| 14 | 10 | 60 to 70 | 65 |
------------------------------------------------------
Best regards,
Mauro Ariel Knudsen.
Argentinean Biodieseler
--- Jan_Sur—wka <[EMAIL PROTECTED]> escribi—: > Hi
to all,
>
> I have an economic problem:
>
> Observing the prices of different oils on Agro
> Exchange (e.g in Rotterdam) I found that
> different oils have different prices:
> For example:
> Rapeseed oil: cost 430 Euro/tonne
> Coconut oil: 230 Euro/tonne
> Soyebean oil: 355 Euro/tonne
>
> Which means that the best source for biodiesel
> should be the cheapest oil.
> It is really the case ? What are differences (if
> any) of biodiesels produced from different oils ???
> Can anyone from the group attempt to address this
> issue , please ?
>
> jan
> [EMAIL PROTECTED]
>
>
> Biofuels at Journey to Forever
> http://journeytoforever.org/biofuel.html
> Biofuel at WebConX
> http://www.webconx.com/2000/biofuel/biofuel.htm
> To unsubscribe from this group, send an email to:
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>
>
>
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>
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