bbjordan
Snow Monkey
A little bit of organic chemistry.
They sure want to distance themselves from "biodiesel", but they say it is made from animal fat. Hmmm...animals are not bio?
So it would appear that they start with animal fat or stearic acid and create a stearic ester.
The acid CH3(CH2)16COOH is called octadecanoic acid, but the old name is still commonly used. This is stearic acid. Starts like this:
The red part gets removed and a Methanol or an Ethanol group gets added in its place. And winds up looking like this:
Compare to diesel:
Ok, so what about biodiesel? Well biodiesel covers a wide range of Methyl Esters usually from oil seeds like soybeans or canola.
The main fatty acids in the oils are oleic (56.80-64.92%), linoleic (17.11-20.92%) and palmitic (4.18-5.01%) acids. They start out like this:
Oleic acid
Linoleic acid
Palmitic acid
As you can see they are similar, but different. The stearic ester is saturated (all the middle carbon bonds have hydrogens). Oleic ester is monounsaturate (it has one double carbon bond). Linoleic ester is a polyunsaturate ( it has more than one double carbon bond). Clear as mud now?
In the end, as fuel, they are all esters. Esters eat rubber. You may want to put a return cap o-ring or two in a jar of HPR and see what happens to them.
With a cetane rating of 75 you will probably want to retard your timing a bit to take full advantage of that. I noticed when I was running biodiesel with a cetane rating of 60 I had to retard the timing. I even disconnected the Cold Advance Solenoid because the engine just rattled too much!
You could try a 20% mix of HPR to #2 diesel and see how it goes...
They sure want to distance themselves from "biodiesel", but they say it is made from animal fat. Hmmm...animals are not bio?
So it would appear that they start with animal fat or stearic acid and create a stearic ester.
The acid CH3(CH2)16COOH is called octadecanoic acid, but the old name is still commonly used. This is stearic acid. Starts like this:
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The red part gets removed and a Methanol or an Ethanol group gets added in its place. And winds up looking like this:
You must be registered for see images attach
Compare to diesel:
You must be registered for see images attach
Ok, so what about biodiesel? Well biodiesel covers a wide range of Methyl Esters usually from oil seeds like soybeans or canola.
The main fatty acids in the oils are oleic (56.80-64.92%), linoleic (17.11-20.92%) and palmitic (4.18-5.01%) acids. They start out like this:
Oleic acid
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Linoleic acid
You must be registered for see images attach
Palmitic acid
You must be registered for see images attach
As you can see they are similar, but different. The stearic ester is saturated (all the middle carbon bonds have hydrogens). Oleic ester is monounsaturate (it has one double carbon bond). Linoleic ester is a polyunsaturate ( it has more than one double carbon bond). Clear as mud now?
In the end, as fuel, they are all esters. Esters eat rubber. You may want to put a return cap o-ring or two in a jar of HPR and see what happens to them.
With a cetane rating of 75 you will probably want to retard your timing a bit to take full advantage of that. I noticed when I was running biodiesel with a cetane rating of 60 I had to retard the timing. I even disconnected the Cold Advance Solenoid because the engine just rattled too much!
You could try a 20% mix of HPR to #2 diesel and see how it goes...