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The BioDiesel Reddit

Biodiesel - a vegetable oil - or animal fat-based diesel fuel consisting of long-chain alkyl (methyl, ethyl, or propyl) esters. Biodiesel is typically made by chemically reacting lipids (e.g., vegetable oil, animal fat (tallow)) with an alcohol producing fatty acid esters.

Biodiesel is meant to be used in standard diesel engines and is thus distinct from the vegetable and waste oils used to fuel converted diesel engines. Biodiesel can be used alone, or blended with petrodiesel in any proportions. Biodiesel blends can also be used as heating oil.

Wikipedia: biodiesel

The home for anyone interested in the superior internal combustion engine known as the diesel, and biofuel integration. This is where we can discuss diesel vehicles in general, clean diesel advances, biodiesel, straight/waste vegetable oil vehicles, algae oil, and anything diesel related.

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Edenia Ep 15: Greeeen Growth! - The ins and outs of growing Algae

14:27 UTC


Whats the best way to measure the reaction rate of transesterification?

I am designing a plant which will adjust the rpm of the stirrer so that it keeps reaction rate at fastest and stop when reaction is complete. Raw materials are used filtered oil, KOH and methanol

08:05 UTC


I am developing a heating mechanism for a biodiesel processing chamber but I do not want to use domestic power supply but I want to optimize the heating so that I use less current as possible. I have to use a 1000W heating element, how can I use less electricity?

The heating element will need to heat up to 110C and then cool down to 60C and maintain at that temperature. Instead of direct plug in to the domestic power supply, is there some way I can make this process optimized or draw power from an alternative source? The project is to develop a 50L biodiesel processing plant. My country is facing diesel shortages and limited power supply but with an abundance of waste oil. My objective to make fuel but using less fuel, this way it is more sustainable production.

16:53 UTC


Anyone substituted gasoline for methanol in a WVO blend?

I've heard mixed reviews, but mostly good stuff from those who tried it. Most said to also put in ~5% acetone or other thinning agent with a 15% RUG 80% WVO mix. Just wondering if anyone's tried this or something similar.

6.0 Powerstroke application. Not my first rodeo.

1 Comment
01:39 UTC


What do you think of making BioDiesel with Sargassum?

Study here

I got the idea by watching this PBS story. Could be a nice industry for Caribbean nations like Haiti.

23:18 UTC


Con someone help find a small indy biodiesel conversion shop?

I found them years ago. They are based in the Pacific Northwest from what I remember. They were doing biodiesel conversions on VW Passat wagons and really doing a full teardown restoration of the vehicles while they were at it. Claimed to get 900 to 1,000 miles on one tank. Does this sound familiar to anyone? If so, would you please link me to their website or other contact info? Thank you!

1 Comment
00:36 UTC


Anyone here in Georgia (USA)?

I have an opportunity to source large quantities of WVO for free to anyone that's within a reasonable proximity to me. Will detail specs if I get any bites.

04:02 UTC


Did I accidentally make fruit flavored biodiesel?

I was messing around with some expired oil at home. I have never produced BD at scale but I have made some before. I used some coconut oil that smelled clean and titrated to 0.5 KOH and I was trying out the 80/20 method described here

On the first addition everything proceeded as normal. As the reaction was reaching the end, I decided to squirt in some of the isopropyl/turmeric indicator I made up before, as per here

Literally just for the fun of it, to see it change to the red color. I only put in a few drops, i would estimate maybe 100-500 microliters based on the titrations I was doing. And now my beaker smells like.. Idk.. fruit loops? Its a powerful smell, it almost knocks you over (but maybe thats also residual methanol). I cant stop trying to take a big whiff of this smell. Its such a fun smell. I want to drink this beaker, no joke. Its like a tropical fruit I never had before.

I thought this was very remarkable. I tried to formulate a theory of what is happening but maybe someone here could chime in what they think. My theory is that the isopropyl alcohol reacted with the triglycerides to form a powerful isopropyl ester smell compound, and I have a candidate or three:

Described as "fruity sweet winey" at 40ppm

green vegetable woody oily fruity

oily winey fruity floral
Wait - that last one comes from methanol! So is it just a whole lot of that? I cant find any references that say coconut BD smells like fruit, you'd think that would be common knowledge? Now I have to do separate smell experiments I guess.

all comments welcome

02:09 UTC


I see you all use methanol but why not ethanol?

You can even produce it yourself

20:10 UTC


Edenia Ep 13: Biodiesel and Glycerin - A successful learning experience

18:17 UTC


Easier to sell corn and buy gas?

My family has some farm land and as rent we take a third of the crop grown which is usually corn. My question is, does it make more sense to sell the corn and just buy gas, or does DIY biodiesel make any sense.

14:44 UTC


New to Biodiesel

Hello everyone. I find myself going down the rabbit hole and am trying to rid myself of consuming diesel because living In the Dominican Republic I find that the Diesel here is very “Dirty”. If anyone can help me with building a reactor I would gladly appreciate it.

17:30 UTC


Biodiesel at scale 25k+ gallons a year

Hi Guys. New to the sub. I run a fairly large real estate investment company and one of our major expenses is heating oil. I am investigating the viability of producing biodiesel at scale and was wondering if anyone has experience on this front? Of particular interest:

  1. Makes/Models/Manufacturers of at scale bio reactors.
  2. Experience acquiring used cooking oil at scale. Transportation, prep of oil if needed, etc.
  3. Anything else that would be of use.

Thanks in advance.

16:29 UTC


can all plant-based oil be used as biofuel?

Sorry if this isn't an appropriate question for this forum but figured I'd give it a shot.

I make skin care products and unfortunately have several gallons of oil (avocado, olive, borage, jojoba, sunflower) that went rancid before I had a chance to use them. I called an oil recycling facility near me but they said they only take used cooking oil, but it didn't sound like she was 100% certain.

These are all plant-based oils, although not food grade. Are these recyclable? What do you suggest I do with nearly 10 gallons of oil?

21:39 UTC


On farm biodiesel production

So I've purchased a seed oil expeller and am having great success at getting oil for biodiesel feedstock from various commodities, however I'm not sure what to do with the meal byproduct. I've been told that it is a great source of protein for various animals, but some of the vets are telling my potential cow farmers to avoid it. I understand that cow food is not just one thing. Some mixing of distillers grain (corn minus the starch) is required and silage. Anyone who does on farm feed care to chime in and educate a farming novice?

20:41 UTC


Ethanol based biodiesel.

Exploring the realm of biodiesel manufacturing for if times get a little rough. Plenty of information online about Methanol based biodiesel and the production and purification processes but I'm finding little to none about ethanol.

I'm assuming with the ethanol it doesn't require the same washing process as methanol but just finding no information online to follow. Wondering if anyone can point me in the right direction or if they have experience in using ethanol themselves.

01:44 UTC


Model of car that's most reliable.

So you have to drive a pre 2006 engine in a diesel? Time to research.

02:52 UTC


New to bio diesel 3.0 diesel jeep. Running 99.9 from pacific bio diesel they say it’s the same as petroleum but have lost economy . 280k miles would it be the fuel or high mileage . 23mpg dropped to 21 on bio diesel. Anything I could be doing?

16:58 UTC


Newbie to Diesel

Just bought my first diesel; a 2015 VW Touareg TDI. I want to start running b50 and up, anyone have any experience with it in the 3.0L V6 TDI?

03:28 UTC


anyone run WVO and off-road diesel mix?

Have heard one of the easiest ways to run WVO in an older diesel motor is to filter it well, then mix it 50/50 with off road diesel. Has anyone used this method?

17:44 UTC


Cost per gallon

What is the current cost per gallon to refine bio diesel from used vegetable oil?

19:10 UTC


Attack of the Gel

So my most recent batch of biodiesel (50 gallons) gelled up after washing it once. Gel has never happened to me like this before. It's legit almost the consistency of Jell-O. This is like the 10th (lye-methanol-wvo) batch I've made and only did three things differently this time...

  1. mixed 130g of lye (520g total) in 4 half-gallon blenderfuls of methanol, later adding half the (now/then) meth-oxide to the remaining 4 gallons of methanol, letting them sit and react for around 20 minutes each before combining the 10 gallons of meth-oxide with the 40 gallons of oil. I normally do the meth-oxide mix in smaller batches.
  2. The weather was colder this time. I cant remember exactly how cold it was that night but I think high-50's...first time I needed long sleeves to be comfortable while making biodiesel. I mix this stuff in an open-air barn in Northeast Georgia. My wvo is a mix of peanut and canola oil.
  3. After mixing it thoroughly with my corded drill for a solid 5 minutes, I let the batch sit for 24 hours before washing it. It seemed to have mixed well (no separation, gelling, etc). While washing it, the spray coming out of the hose nozzle caused an abnormal amount of suds to bubble up upon contact with the biodiesel... Like if I didnt stop spraying the vat would have overflowed with suds.
  4. There was slightly more unfiltered sediment in this wvo than usual. I had just gotten about 110 gallons of new (used) oil that day, and added it to the 300 gallon tote I keep behind the barn. Later that evening (right before mixing), I got the oil from the bottom nozzle of the tote, where/when I assume shit had settled. 24 hours after washing it, I siphoned off 7-ish gallons of waste sludge-water from the bottom of the batch. Only had added 5-ish gallons of water to wash it a day before.

Sorry for the long post. What have I done wrong and how can I fix it? Any/all input appreciated.

1 Comment
02:42 UTC


Hilux and biodiesel

Just picked up a 92 Hilux with a 2L-II, joined the group to learn more about making my own biodiesel from WVO without cratering my engine.

Have heard filtered WVO mixed 50/50 with off road diesel runs well, any truth to this?

19:03 UTC


2015 chevy LML

Alright. Say hypothetically I wanted to run bio in this. It would also have a FASS fuel system, and have undergone the weightloss program (hypothetically), and a CAI~ not sure if any of that is even a factor.

What else would one have to do to reliably run biodiesel? Like home made stuff.

Thanks again, appreciate the input.

16:49 UTC


looking to try my hand at production, can I use Klean Strip denatured alcohol?

My question is mostly, what kind of adulterants and additives do I not want to have when processing. I plan on doing some small scale tests to try my hand before I venture into a larger production, so what is easily available to me at the moment is preferred. I've found Klean Strip Denatured Alcohol Camp Fuel to be my best option at the moment. The SDS shows a concentration of 30%-40% ethanol and 50%-60% methanol, will this mixture work or should I try to use purer non-mixed alcohols?

Also, I am having a hard time finding proper ratios online, do you have any set ratios oil-lye-ester.

13:36 UTC


Considering converting

I’ve got a VW TDI and looking for tips on getting started with the conversion. Anything specific topics or processes I should research first?

How much did it cost to convert your vehicle? Do you have a hard time finding any specific thing?

15:59 UTC

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