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Chatter / Re: BBB 2025
« Last post by dgs on May 16, 2025, 06:25:51 PM »I'll be there. will bring the usual vin fuel and kerro.
Recent Posts
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Chemistry and process / Re: Chemists! Is using 50% KOH & 50% NaOH in 2 Stage Process stage 1 OK?
« Last post by neisel on May 15, 2025, 12:39:21 PM »Bump!
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Chatter / Re: BBB 2025
« Last post by Head Womble on May 13, 2025, 07:29:44 PM »That's a good reason to change the date.
Sadly I'm booked into an archery competition that weekend
I normally let Carl know via Whatsap, but my phone died and I lost all my old contacts, so if anyone else has his number please let him know.
Sadly I'm booked into an archery competition that weekend
I normally let Carl know via Whatsap, but my phone died and I lost all my old contacts, so if anyone else has his number please let him know.
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Chemistry and process / Re: Chemists! Is using 50% KOH & 50% NaOH in 2 Stage Process stage 1 OK?
« Last post by neisel on May 13, 2025, 08:07:25 AM »Yes, it was glyc washed.
What do you find odd about the S1 chem percentages?
What do you find odd about the S1 chem percentages?
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Chemistry and process / Re: Chemists! Is using 50% KOH & 50% NaOH in 2 Stage Process stage 1 OK?
« Last post by dgs on May 12, 2025, 10:28:44 AM » Well done. although I'm a bit puzzled about the % of chems you used noteably methanol in S1.
Presumably your oil was glyc washed.
Presumably your oil was glyc washed.
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Chemistry and process / Re: Chemists! Is using 50% KOH & 50% NaOH in 2 Stage Process stage 1 OK?
« Last post by nigelb on May 11, 2025, 05:03:31 PM »Isn't shed alchemy brilliant.
Not so good when it goes wrong but if those episodes are kept to a minimum it's happy days.
Not so good when it goes wrong but if those episodes are kept to a minimum it's happy days.
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Chemistry and process / Re: Chemists! Is using 50% KOH & 50% NaOH in 2 Stage Process stage 1 OK?
« Last post by neisel on May 11, 2025, 11:42:13 AM »I suppose making bio has turned us all into chemists to one degree or another, though I'am a v. amateurish, ignorant, incompetent one.
I went ahead & as you predicted it turned out fine. 145L of WVO consumed 450grms of KOH & 350 of NaOH with 16L of v. meth, followed by S2's 150 grms of NaOH & 4.6L of methanol mixed up a treat. 100% conversion, no explosions, no fires, no soap. Easy peasy.
I went ahead & as you predicted it turned out fine. 145L of WVO consumed 450grms of KOH & 350 of NaOH with 16L of v. meth, followed by S2's 150 grms of NaOH & 4.6L of methanol mixed up a treat. 100% conversion, no explosions, no fires, no soap. Easy peasy.
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Chemistry and process / Re: Chemists! Is using 50% KOH & 50% NaOH in 2 Stage Process stage 1 OK?
« Last post by dgs on May 11, 2025, 09:49:22 AM » Can non chemists also answer this?
It's fine. I've been doing it for years.
Dissolve the potassium first, then add the Sodium when it's warm, it dissolves quicker.
The glyc is always liqiud except for cold snaps in Winter when it can go partially solid. As you say its more viscous than just using KOH.
It's fine. I've been doing it for years.
Dissolve the potassium first, then add the Sodium when it's warm, it dissolves quicker.
The glyc is always liqiud except for cold snaps in Winter when it can go partially solid. As you say its more viscous than just using KOH.
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Chemistry and process / Chemists! Is using 50% KOH & 50% NaOH in 2 Stage Process stage 1 OK?
« Last post by neisel on May 10, 2025, 10:01:32 AM »By OK I mean safety wise really. It's not going to blow up or spontaneously combust, is it?
I'm running low on KOH & am wondering if I can stretch it out to last this fuel making season by using 50% NaOH in my first stage instead of 100% KOH.
I use 100% NaOH in Stage 2 as I water wash & am not concerned with the viscosity of the glyc since it gets washed away before it gets even remotely hard.
Presumably the glyc in my 50/50 scenario would be more runny than that produced by straight NaOH & less runny than straight KOH glyc?
I'm running low on KOH & am wondering if I can stretch it out to last this fuel making season by using 50% NaOH in my first stage instead of 100% KOH.
I use 100% NaOH in Stage 2 as I water wash & am not concerned with the viscosity of the glyc since it gets washed away before it gets even remotely hard.
Presumably the glyc in my 50/50 scenario would be more runny than that produced by straight NaOH & less runny than straight KOH glyc?
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Vehicles / Re: Volkswagen T5 2.5tdi 2007 on bio ?
« Last post by Davedewhurst on May 07, 2025, 08:54:28 AM »4 years late but not too sure mate
did you try it? how did you get on?
Wondering the same as my T4 is now dead
Cheers
did you try it? how did you get on?
Wondering the same as my T4 is now dead
Cheers